diff --git a/src/app/components/components.module.ts b/src/app/components/components.module.ts
index fee6f6d5..1c9b8ae1 100644
--- a/src/app/components/components.module.ts
+++ b/src/app/components/components.module.ts
@@ -37,8 +37,9 @@ import {JsonTextComponent} from './data-view/json-text/json-text.component';
 import {NgxJsonViewerModule} from 'ngx-json-viewer';
 import {JsonEditorComponent} from './json/json-editor.component';
 import {JsonElemComponent} from './json/json-elem/json-elem.component';
+import {ListPickerComponent} from './list-picker/list-picker.component';
+import {DragDropModule} from '@angular/cdk/drag-drop';
 import {DataGraphComponent} from './data-view/data-graph/data-graph.component';
-import {MultipleSwitchPipe} from './data-view/multiple-switch.pipe';
 import {DatesPipeModule} from './data-view/shared-module';
 
 //import 'hammerjs';
@@ -49,6 +50,7 @@ import {DatesPipeModule} from './data-view/shared-module';
         RouterModule,
         CommonModule,
         ChartsModule,
+        DragDropModule,
         TypeaheadModule.forRoot(),
         AppBreadcrumbModule.forRoot(),
         TreeModule,
@@ -73,6 +75,7 @@ import {DatesPipeModule} from './data-view/shared-module';
         InformationManagerComponent,
         RenderItemComponent,
         InputComponent,
+        ListPickerComponent,
         EditorComponent,
         JsonEditorComponent,
         DataViewComponent,
@@ -99,10 +102,11 @@ import {DatesPipeModule} from './data-view/shared-module';
         ToastComponent,
         InformationManagerComponent,
         InputComponent,
+        ListPickerComponent,
         JsonEditorComponent,
         EditorComponent,
         DeleteConfirmComponent
     ]
 })
 export class ComponentsModule {
-}
+}
\ No newline at end of file
diff --git a/src/app/components/list-picker/list-picker.component.html b/src/app/components/list-picker/list-picker.component.html
new file mode 100644
index 00000000..b2442409
--- /dev/null
+++ b/src/app/components/list-picker/list-picker.component.html
@@ -0,0 +1,21 @@
+<div class="source-column">
+  <span>{{ sourceTitle }}</span>
+  <div class="list-container">
+    <div *ngFor="let option of _getSourceOptions()" class="list-item" (click)="_onAddOption(option)">
+      <span>{{ option[labelProperty] }}</span>
+      <em class="fa fa-solid fa-chevron-right"></em>
+    </div>
+  </div>
+</div>
+
+<div class="target-column">
+  <span>{{ targetTitle }}</span>
+  <div id="target-container" class="list-container" cdkDropList (cdkDropListDropped)="_onMoveOption($event)">
+    <div *ngFor="let option of _value;  let first = first;  let last = last;" class="list-item"
+      (click)="_onRemoveOption(option)" cdkDrag [cdkDragData]="option" [cdkDragDisabled]="disableSort"
+      cdkDragBoundary="#target-container">
+      <span>
+        <em *ngIf="!disableSort" class="fa fa-solid fa-sort"></em> {{ option[labelProperty] }}</span>
+    </div>
+  </div>
+</div>
\ No newline at end of file
diff --git a/src/app/components/list-picker/list-picker.component.scss b/src/app/components/list-picker/list-picker.component.scss
new file mode 100644
index 00000000..0c67e34c
--- /dev/null
+++ b/src/app/components/list-picker/list-picker.component.scss
@@ -0,0 +1,66 @@
+.app-list-picker {
+    display: flex;
+    gap: 10px;
+
+    .source-column,
+    .target-column {
+        display: flex;
+        flex-direction: column;
+    }
+
+    .list-container {
+        min-width: 200px;
+        min-height: 200px;
+        max-height: 200px;
+        border: 1px #e4e7ea solid;
+        flex: 1 1 auto;
+        border-radius: 0.2rem;
+        overflow-y: scroll;
+    }
+    
+    .list-container .list-item:not(.cdk-drag-dragging) {
+        opacity: 1;
+        padding: 0.2rem 0.5rem;
+        transition: all 0.2s;
+        display: flex;
+        align-items: center;
+        justify-content: space-between;
+        border: 1px var(--white) solid;
+        border-radius: 0;
+        box-shadow: none;
+        border: 1x var(--white) solid;
+        background: var(--white);
+
+        em {
+            color: var(--gray);
+            font-size: 10px;
+        }
+    }
+
+    .list-container .list-item:not(.cdk-drag-dragging):hover {
+        background: var(--light);
+        cursor: pointer;
+    }
+
+    .list-container .list-item.cdk-drag-placeholder {
+        opacity: 0.2;
+    }
+}
+
+.cdk-drag.list-item { 
+    opacity: 1;
+    padding: 0.2rem 0.5rem;
+    transition: all 0.1s;
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    background: var(--light);
+    border: 1px var(--gray) solid;
+    border-radius: 0.2rem;
+    box-shadow: 0px 0px 5px var(--light);
+    
+    em {
+        color: var(--gray);
+        font-size: 10px;
+    }
+}
\ No newline at end of file
diff --git a/src/app/components/list-picker/list-picker.component.ts b/src/app/components/list-picker/list-picker.component.ts
new file mode 100644
index 00000000..3d234e7e
--- /dev/null
+++ b/src/app/components/list-picker/list-picker.component.ts
@@ -0,0 +1,116 @@
+import { CdkDragDrop, moveItemInArray } from '@angular/cdk/drag-drop';
+import { Component, EventEmitter, forwardRef, HostBinding, Input, Output, ViewEncapsulation } from '@angular/core';
+import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';
+
+/**
+ * ListPickerComponent is used to select multiple values from a list of options.
+ */
+@Component({
+  selector: 'app-list-picker',
+  templateUrl: './list-picker.component.html',
+  styleUrls: ['./list-picker.component.scss'],
+  encapsulation: ViewEncapsulation.None,
+  providers: [
+    {
+      provide: NG_VALUE_ACCESSOR,
+      useExisting: forwardRef(() => ListPickerComponent),
+      multi: true,
+    },
+  ],
+})
+export class ListPickerComponent<T> implements ControlValueAccessor {
+  
+  @HostBinding("class")
+  classes = ["app-list-picker"]
+
+  /**
+   * Title of the source options
+   */
+  @Input()
+  sourceTitle = "Source";
+
+  /**
+   * Title of the target options
+   */
+  @Input()
+  targetTitle = "Target";
+
+  /**
+   * An array of objects to display as the available options.
+   */
+  @Input()
+  sourceOptions: Array<T>
+
+  /**
+   * Name of the label field of an option.
+   */
+  @Input()
+  labelProperty: keyof T | null;
+
+  /**
+   * Number of maximum options that can be selected.
+   */
+  @Input()
+  selectionLimit = Infinity;
+
+  /**
+   * Disable drag and drop sorting
+   */
+  @Input()
+  disableSort = false;
+
+  /**
+   * Callback to invoke when selection limit is reached.
+   */
+  @Output()
+  selectionLimitReached = new EventEmitter<void>();
+
+  _value: Array<T> | null;
+
+  _disabled: boolean;
+
+  _onChange: (value: Array<T>) => void
+
+  _onTouched: () => void
+
+  writeValue(value: Array<T>): void {
+   this._value = value
+  }
+
+  registerOnChange(fn: (value: Array<T>) => void): void {
+    this._onChange = fn
+  }
+
+  registerOnTouched(fn:  () => void): void {
+    this._onTouched = fn
+  }
+
+  setDisabledState?(isDisabled: boolean): void {
+   this._disabled = isDisabled;
+  }
+
+  _getSourceOptions = () => {
+    return this.sourceOptions?.filter(option => !this._value?.includes(option));
+  }
+
+  _onAddOption = (option: T) => {
+    this._onTouched();
+    if((this._value?.length ?? 0) < this.selectionLimit) {
+      this._value = [...this._value ?? [], option];
+      this._onChange(this._value);
+    } else {
+      this.selectionLimitReached.emit()
+    }
+  }
+
+  _onRemoveOption = (option: T) => {
+    this._value?.splice( this._value?.indexOf(option), 1);
+    this._onChange(this._value);
+    this._onTouched();
+  }
+
+
+  _onMoveOption = (event: CdkDragDrop<T, any>) => {
+    moveItemInArray(this._value, event.previousIndex, event.currentIndex);
+  }
+}
diff --git a/src/app/models/ui-request.model.ts b/src/app/models/ui-request.model.ts
index 7b022c23..ea436410 100644
--- a/src/app/models/ui-request.model.ts
+++ b/src/app/models/ui-request.model.ts
@@ -230,6 +230,26 @@ export class ColumnRequest extends UIRequest {
   }
 }
 
+
+/**
+ * Merge columns within a relational namespace.
+ * Used for request where you want to merge multiple columns of a table.
+ */
+export class MergeColumnsRequest extends UIRequest {
+  sourceColumns: DbColumn[];
+  targetColumnName: string;
+  joinString: string;
+  tableType: string;
+  constructor( tableId: string, sourceColumns: DbColumn[],  targetColumnName: string, joinString: string, tableType:string = 'table' ) {
+    super();
+    this.tableId = tableId;
+    this.sourceColumns = sourceColumns;
+    this.targetColumnName = targetColumnName;
+    this.joinString = joinString;   
+    this.tableType = tableType;
+  }
+}
+
 export class MaterializedRequest extends UIRequest{
   constructor(tableId: string) {
     super();
@@ -271,6 +291,24 @@ export class EditTableRequest {
   }
 }
 
+/**
+ * Transfer a table from one namespace to another.
+ * Used for request where you want to transfer a table
+ */
+ export class TransferTableRequest {
+  table: string;
+  sourceSchema: string;
+  targetSchema: string;
+  primaryKeyNames: string;
+
+  constructor( table: string, sourceNamespaceName: string, targetNamespaceName: string, primaryKeyNames: string ) {
+    this.table = table;
+    this.sourceSchema = sourceNamespaceName;
+    this.targetSchema = targetNamespaceName;
+    this.primaryKeyNames = primaryKeyNames;
+  }
+}
+
 export class EditCollectionRequest {
   database: string;
   collection: string;
diff --git a/src/app/services/crud.service.ts b/src/app/services/crud.service.ts
index b9933953..9940416f 100644
--- a/src/app/services/crud.service.ts
+++ b/src/app/services/crud.service.ts
@@ -5,8 +5,7 @@ import {
   Index,
   ModifyPartitionRequest,
   PartitionFunctionModel,
-  PartitioningRequest,
-  ResultSet
+  PartitioningRequest
 } from '../components/data-view/models/result-set.model';
 import {webSocket} from 'rxjs/webSocket';
 import {
@@ -18,7 +17,9 @@ import {
   ExploreTable,
   GraphRequest,
   MaterializedRequest,
+  MergeColumnsRequest,
   MonitoringRequest,
+  TransferTableRequest,
   QueryRequest,
   RelAlgRequest,
   Schema,
@@ -204,6 +205,13 @@ export class CrudService {
     return this._http.post(`${this.httpUrl}/dropColumn`, columnRequest, this.httpOptions);
   }
 
+   /**
+   * Merge columns of a table in a relational namespace
+   */
+  mergeColumns ( columnRequest: MergeColumnsRequest ) {
+    return this._http.post(`${this.httpUrl}/mergeColumns`, columnRequest, this.httpOptions);
+  }
+
   /**
    * Get list of tables of a schema to truncate/drop them
    */
@@ -225,6 +233,13 @@ export class CrudService {
     return this._http.post(`${this.httpUrl}/createTable`, tableRequest, this.httpOptions);
   }
 
+  /**
+   * Transfer a table to another schema
+   */
+   transferTable( tableRequest: TransferTableRequest ) {
+    return this._http.post(`${this.httpUrl}/transferTable`, tableRequest, this.httpOptions);
+  }
+
   /**
    * Create a new collection
    */
@@ -618,4 +633,4 @@ export class CrudService {
       return 'is-invalid';
     }
   }
-}
+}
\ No newline at end of file
diff --git a/src/app/views/schema-editing/document-edit-collections/document-edit-collections.component.html b/src/app/views/schema-editing/document-edit-collections/document-edit-collections.component.html
index c2c7c175..903948f3 100644
--- a/src/app/views/schema-editing/document-edit-collections/document-edit-collections.component.html
+++ b/src/app/views/schema-editing/document-edit-collections/document-edit-collections.component.html
@@ -11,6 +11,7 @@ <h5>Collections in <i>{{database}}</i> [{{schemaType}}]</h5>
             <th>Collection</th>
             <th>Truncate</th>
             <th>Drop</th>
+            <th *ngIf="getAvailableSchemas().length > 0">Transfer</th>
         </tr>
     </thead>
     <tbody>
@@ -50,6 +51,26 @@ <h5>Collections in <i>{{database}}</i> [{{schemaType}}]</h5>
                     </div>
                 </div>
             </td>
+            <td *ngIf="getAvailableSchemas().length > 0">
+              <div class="input-group confirm-group" *ngIf="table.modifiable">
+                <div class="btn-group btn-group-sm" id="transferBtnGroup">
+                  <div class="btn-group btn-group-sm" dropdown placement="top right">
+                    <button dropdownToggle type="button" class="btn btn-primary dropdown-toggle"  style="min-width:140px">
+                        <span *ngIf="!getSelectedSchemaForTable(table)">Select namespace</span>
+                        <span *ngIf="getSelectedSchemaForTable(table)">{{getSelectedSchemaForTable(table)}}</span>
+                        <span class="canewret"></span>
+                    </button>
+                    <ul *dropdownMenu class="dropdown-menu dropdown-menu-right" role="menu">
+                        <ng-container *ngFor="let namespace of getAvailableSchemas()">
+                            <li role="menuitem"><a class="dropdown-item" [routerLink]="[]" (click)="selectSchemaForTable(table, namespace.name)">{{namespace.name}}</a></li>
+                        </ng-container>
+                        <li *ngIf="getAvailableSchemas().length === 0" role="menuitem"><a class="dropdown-item disabled" [routerLink]="[]">no other namespaces available</a></li>
+                    </ul>
+                  </div>
+                  <button class="btn btn-primary btn-sm" (click)="initTransferTableModal(table)">transfer</button>
+                </div>
+              </div>
+            </td>
         </tr>
     </tbody>
 </table>
@@ -189,3 +210,37 @@ <h4 class="modal-title">Export tables</h4>
     </div><!-- /.modal-content -->
   </div><!-- /.modal-dialog -->
 </div>
+
+<div bsModal #transferTableModal="bs-modal" class="modal fade" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
+  <div class="modal-dialog" role="document">
+    <div class="modal-content">
+      <form [formGroup]="transferTableForm">
+        <div class="modal-header">
+          <h4 class="modal-title">Transfer collection to relational namespace</h4>
+          <button type="button" class="close" (click)="transferTableModal.hide()" aria-label="Close">
+            <span aria-hidden="true">&times;</span>
+          </button>
+        </div>
+
+        <div class="modal-body">
+          <p>The transfer of a document-based collection to a relational namespace only works to a limited extent. Please select a field that should become the primary key.
+            Example for the input: ("id1","id2")
+          </p>
+          <div class="form-group">
+            <div class="input-group">
+              <div class="input-group-prepend"><label for="fieldName" class="input-group-text">Field</label></div>
+              <input type="text" placeholder="name" id="fieldName" class="form-control" formControlName="name"
+                     autocomplete="off">
+            </div>
+          </div>
+          <div class="modal-footer">
+            <button type="button" class="btn btn-secondary" (click)="transferTableModal.hide()">Close</button>
+            <button type="button" class="btn btn-primary" (click)="transferTable()" [disabled]="uploading">
+              Transfer
+            </button>
+          </div>
+        </div>
+      </form>
+    </div><!-- /.modal-content -->
+  </div><!-- /.modal-dialog -->
+</div>
diff --git a/src/app/views/schema-editing/document-edit-collections/document-edit-collections.component.ts b/src/app/views/schema-editing/document-edit-collections/document-edit-collections.component.ts
index aa15c042..499f5827 100644
--- a/src/app/views/schema-editing/document-edit-collections/document-edit-collections.component.ts
+++ b/src/app/views/schema-editing/document-edit-collections/document-edit-collections.component.ts
@@ -1,6 +1,6 @@
 import {Component, OnDestroy, OnInit, ViewChild} from '@angular/core';
 import {CrudService} from '../../../services/crud.service';
-import {EditCollectionRequest, EditTableRequest, SchemaRequest} from '../../../models/ui-request.model';
+import {EditCollectionRequest, EditTableRequest, SchemaRequest, TransferTableRequest} from '../../../models/ui-request.model';
 import {ActivatedRoute, Router} from '@angular/router';
 import {DbColumn, Index, PolyType, ResultSet, Status} from '../../../components/data-view/models/result-set.model';
 import {ToastDuration, ToastService} from '../../../components/toast/toast.service';
@@ -15,13 +15,18 @@ import {UtilService} from '../../../services/util.service';
 import * as $ from 'jquery';
 import {DbTable} from '../../uml/uml.model';
 
+class Namespace {
+  name: string;
+  id: string;
+}
+
 @Component({
   selector: 'app-document-edit-collections',
   templateUrl: './document-edit-collections.component.html',
   styleUrls: ['./document-edit-collections.component.scss']
 })
 export class DocumentEditCollectionsComponent implements OnInit, OnDestroy {
-
+  
   types: PolyType[] = [];
   database: string;
   schemaType: string;
@@ -34,6 +39,11 @@ export class DocumentEditCollectionsComponent implements OnInit, OnDestroy {
   selectedStore;
   creatingTable = false;
 
+  activeNamespace: string;
+  namespaces: Namespace[];
+  selectedSchemas = new Map<string, string>(); // name of the collection, name of the selected namespace
+  tableToTransfer : TableModel;
+
   //export table
   showExportButton = false;
   exportProgress = 0.0;
@@ -47,6 +57,11 @@ export class DocumentEditCollectionsComponent implements OnInit, OnDestroy {
     addDefaultValue: new FormControl(true, Validators.required)
   });
   @ViewChild('exportTableModal', {static: false}) public exportTableModal: ModalDirective;
+  transferTableForm = new FormGroup({
+    name: new FormControl('', Validators.required),
+  });
+  @ViewChild('transferTableModal', {static: false}) public transferTableModal: ModalDirective;
+
 
   constructor(
     public _crud: CrudService,
@@ -78,6 +93,7 @@ export class DocumentEditCollectionsComponent implements OnInit, OnDestroy {
     });
     this.subscriptions.add(sub2);
     this.documentListener();
+    this.updateExistingSchemas();
   }
 
   ngOnDestroy() {
@@ -380,6 +396,72 @@ export class DocumentEditCollectionsComponent implements OnInit, OnDestroy {
     );
   }
 
+  /**
+   * Transfer table (a collection) from one namepsace to another
+   */
+  transferTable() {
+    let primaryKeyNames = this.transferTableForm.controls['name'].value;
+    const req = new TransferTableRequest( this.tableToTransfer.name, this.database, this.getSelectedSchemaForTable(this.tableToTransfer), primaryKeyNames);
+    this._crud.transferTable( req ).subscribe(
+      res => {
+        const result = <ResultSet>res;
+        if (result.error) {
+          this._toast.exception(result, 'Could not transfer collection:');
+        } else {
+          this._toast.success('Transfered collection ' + this.tableToTransfer.name, result.generatedQuery);
+          this.updateExistingSchemas();
+          this.selectedSchemas.delete(this.tableToTransfer.name);
+          this._leftSidebar.setSchema(new SchemaRequest('/views/schema-editing/', true, 2, false), this._router);
+        }
+        this.getTables();
+      }, err => {
+        this._toast.error('Could not transfer collection');
+        console.log(err);
+      }
+    ).add(() => {
+      this.transferTableModal.hide();
+    });
+  }
+
+  selectSchemaForTable(table : TableModel, selectedSchema : string) {
+    this.selectedSchemas.set(table.name, selectedSchema);
+  }
+
+  getSelectedSchemaForTable(table : TableModel) {
+    return this.selectedSchemas.get(table.name);
+  }
+
+  getAvailableSchemas (): Namespace[] {
+    if(!this.namespaces) { return []; }
+    return this.namespaces.filter( (n: Namespace) => {
+      return n.name != this.database;
+    });
+  }
+
+  private updateExistingSchemas() {
+    this._crud.getSchema(new SchemaRequest('views/querying/console/', false, 1, false)).subscribe(
+        res => {
+          this.namespaces = [];
+          for (const namespace of <Namespace[]>res) {
+              this.namespaces.push(namespace);
+          }
+        }
+    );
+  }
+
+  initTransferTableModal(table : TableModel ){
+    let selectedSchema = this.getSelectedSchemaForTable(table)
+    if (selectedSchema == undefined) {
+      return;
+    }
+    this.tableToTransfer = table;
+    this.transferTableModal.show();
+  }
+
+  clearTransferTableModal(){
+    this.selectedStore = null;
+  }
+
 }
 
 class TableModel {
diff --git a/src/app/views/schema-editing/edit-columns/edit-columns.component.html b/src/app/views/schema-editing/edit-columns/edit-columns.component.html
index 02d9a0a1..0621118f 100644
--- a/src/app/views/schema-editing/edit-columns/edit-columns.component.html
+++ b/src/app/views/schema-editing/edit-columns/edit-columns.component.html
@@ -524,7 +524,35 @@ <h5 style="display: inline">Data placements</h5>
                 </div>
             </div>
         </div>
+    </div>
 
+    <div class="col-lg-12">
+        <hr>
+        <div class="mb-3" style="position: relative">
+          <h5 style="display: inline">Schema Evolutions</h5>
+        </div>
+        <div class="card">
+            <div class="card-header">
+                <span>Merge columns</span>
+            </div>
+            <div class="card-body">          
+                <p>Currently, only the merge of non-primary, varchar columns is permitted.</p> 
+                <div class="constraint-columns mb-2">
+                    <app-list-picker [sourceOptions]="mergeableColumns" [(ngModel)]="columnsToMerge" 
+                        labelProperty="name" sourceTitle="Mergeable columns" targetTitle="Columns to merge (sortable)" selectionLimit="3"></app-list-picker>
+                </div>
+                <div class="form-inline mb-2">
+                    <div class="form-group">
+                        <label for="joinString">Join string</label>
+                        <input id="joinString" type="text" class="form-control form-control-sm" [(ngModel)]="joinString">
+                        <label for="mergedColumnName">New column name</label>
+                        <input id="mergedColumnName" type="text" class="form-control form-control-sm" [(ngModel)]="mergedColumnName"
+                               [ngClass]="_crud.getValidationClass(mergedColumnName)">
+                    </div>
+                    <button class="btn btn-sm btn-primary" (click)="mergeColumns()">merge</button>
+                </div>
+            </div>
+        </div>
     </div>
 
 </div>
diff --git a/src/app/views/schema-editing/edit-columns/edit-columns.component.ts b/src/app/views/schema-editing/edit-columns/edit-columns.component.ts
index e0b68ef5..5f4377f7 100644
--- a/src/app/views/schema-editing/edit-columns/edit-columns.component.ts
+++ b/src/app/views/schema-editing/edit-columns/edit-columns.component.ts
@@ -6,7 +6,7 @@ import {CrudService} from '../../../services/crud.service';
 import {DbColumn, FieldType, Index, ModifyPartitionRequest, PartitionFunctionModel, PartitioningRequest, PolyType, ResultSet, StatisticColumnSet, StatisticTableSet, TableConstraint} from '../../../components/data-view/models/result-set.model';
 import {ToastDuration, ToastService} from '../../../components/toast/toast.service';
 import {FormControl, FormGroup, Validators} from '@angular/forms';
-import {ColumnRequest, ConstraintRequest, EditTableRequest, MaterializedRequest} from '../../../models/ui-request.model';
+import {ColumnRequest, ConstraintRequest, EditTableRequest, MaterializedRequest, MergeColumnsRequest} from '../../../models/ui-request.model';
 import {DbmsTypesService} from '../../../services/dbms-types.service';
 import {CatalogColumnPlacement, MaterializedInfos, Placements, PlacementType, Store} from '../../adapters/adapter.model';
 import {ModalDirective} from 'ngx-bootstrap/modal';
@@ -39,6 +39,12 @@ export class EditColumnsComponent implements OnInit, OnDestroy {
   confirmConstraint = -1;
   newPrimaryKey: DbColumn[];
 
+  //merge columns handling
+  mergedColumnName = '';
+  joinString = '';
+  mergeableColumns: DbColumn[];
+  columnsToMerge: DbColumn[] = [];
+
   uniqueConstraintName = '';
   proposedConstraintName = 'constraintName';
 
@@ -171,6 +177,7 @@ export class EditColumnsComponent implements OnInit, OnDestroy {
         this.partitioningRequest.column = this.resultSet.header[0].name;
         // deep copy: from: https://stackoverflow.com/questions/35504310/deep-copy-an-array-in-angular-2-typescript
         this.newPrimaryKey = this.resultSet.header.map( x => Object.assign({}, x));
+        this.mergeableColumns = this.resultSet.header.filter(x => x.dataType == 'VARCHAR' && !x.primary).map( x => Object.assign({}, x));
       }, err => {
         this._toast.error('Could not load columns of the table.', null, ToastDuration.INFINITE);
         console.log(err);
@@ -462,6 +469,50 @@ export class EditColumnsComponent implements OnInit, OnDestroy {
     );
   }
 
+  mergeColumns() {
+
+    if( this.columnsToMerge?.length < 2 ) {
+      this._toast.warn('Please select at least 2 columns to merge.', 'merged colum name');
+      return;
+    }
+    if( this.mergedColumnName === '' ) {
+      this._toast.warn('Please provide a name for the merged column.', 'merged colum name');
+      return;
+    }
+    if( ! this._crud.nameIsValid( this.mergedColumnName ) ){
+      this._toast.warn(this._crud.invalidNameMessage('column'), 'invalid column name');
+      return;
+    }
+
+    if( this.resultSet.header
+        .filter( h => !this.columnsToMerge.map(h => h.name).includes(h.name))
+        .filter( h => h.name === this.mergedColumnName )
+        .length > 0 ) {
+      this._toast.warn( 'There already exists a column with this name. However, it is allowed to select one of the names of the columns to be merged', 
+      'invalid column name' );
+      return;
+    }
+
+    const req = new MergeColumnsRequest( this.tableId, this.columnsToMerge, this.mergedColumnName, this.joinString)
+    this._crud.mergeColumns( req ).subscribe(
+      res => {
+        const result = <ResultSet> res;
+        if( result.error === undefined ){
+          this.getColumns();
+          this.getPlacementsAndPartitions();
+          this.mergedColumnName = '';
+          this.columnsToMerge = [];
+          this.joinString = '';
+        } else {
+          this._toast.exception(result, null, 'server error', ToastDuration.INFINITE);
+        }
+      }, err => {
+        this._toast.error('An error occurred on the server.', null, ToastDuration.INFINITE);
+        console.log(err);
+    }
+    );
+  }
+
   addUniqueConstraint(){
     if( this.uniqueConstraintName === '' ) {
       if (!this.proposedConstraintName) {
diff --git a/src/app/views/schema-editing/edit-tables/edit-tables.component.html b/src/app/views/schema-editing/edit-tables/edit-tables.component.html
index 2b23b471..fc24e8b6 100644
--- a/src/app/views/schema-editing/edit-tables/edit-tables.component.html
+++ b/src/app/views/schema-editing/edit-tables/edit-tables.component.html
@@ -11,6 +11,7 @@ <h5>Tables in <i>{{schema}}</i> [{{schemaType}}]</h5>
             <th>Table</th>
             <th>Truncate</th>
             <th>Drop</th>
+            <th *ngIf="getAvailableSchemas().length > 0">Transfer</th>
         </tr>
     </thead>
     <tbody>
@@ -50,6 +51,26 @@ <h5>Tables in <i>{{schema}}</i> [{{schemaType}}]</h5>
                     </div>
                 </div>
             </td>
+            <td *ngIf="getAvailableSchemas().length > 0">
+              <div class="input-group confirm-group" *ngIf="table.modifiable">
+                <div class="btn-group btn-group-sm" id="moveBtnGroup">
+                  <div class="btn-group btn-group-sm" dropdown placement="top right">
+                    <button dropdownToggle type="button" class="btn btn-primary dropdown-toggle"  style="min-width:140px">
+                        <span *ngIf="!getSelectedSchemaForTable(table)">Select namespace</span>
+                        <span *ngIf="getSelectedSchemaForTable(table)">{{getSelectedSchemaForTable(table)}}</span>
+                        <span class="canewret"></span>
+                    </button>
+                    <ul *dropdownMenu class="dropdown-menu dropdown-menu-right" role="menu">
+                        <ng-container *ngFor="let namespace of getAvailableSchemas()">
+                            <li role="menuitem"><a class="dropdown-item" [routerLink]="[]" (click)="selectSchemaForTable(table, namespace.name)">{{namespace.name}}</a></li>
+                        </ng-container>
+                        <li *ngIf="getAvailableSchemas().length === 0" role="menuitem"><a class="dropdown-item disabled" [routerLink]="[]">no other namespaces available</a></li>
+                    </ul>
+                  </div>
+                  <button class="btn btn-primary btn-sm" (click)="transferTable(table)">transfer</button>
+                </div>
+              </div>
+            </td>
         </tr>
     </tbody>
 </table>
diff --git a/src/app/views/schema-editing/edit-tables/edit-tables.component.ts b/src/app/views/schema-editing/edit-tables/edit-tables.component.ts
index 39cc57c4..ecfc43db 100644
--- a/src/app/views/schema-editing/edit-tables/edit-tables.component.ts
+++ b/src/app/views/schema-editing/edit-tables/edit-tables.component.ts
@@ -1,6 +1,6 @@
 import {Component, OnDestroy, OnInit, ViewChild} from '@angular/core';
 import {CrudService} from '../../../services/crud.service';
-import {EditTableRequest, SchemaRequest} from '../../../models/ui-request.model';
+import {EditTableRequest, SchemaRequest, TransferTableRequest} from '../../../models/ui-request.model';
 import {ActivatedRoute, Router} from '@angular/router';
 import {DbColumn, Index, PolyType, ResultSet, Status} from '../../../components/data-view/models/result-set.model';
 import {ToastDuration, ToastService} from '../../../components/toast/toast.service';
@@ -15,6 +15,11 @@ import {UtilService} from '../../../services/util.service';
 import * as $ from 'jquery';
 import {DbTable} from '../../uml/uml.model';
 
+class Namespace {
+  name: string;
+  id: string;
+}
+
 @Component({
   selector: 'app-edit-tables',
   templateUrl: './edit-tables.component.html',
@@ -22,6 +27,8 @@ import {DbTable} from '../../uml/uml.model';
 })
 export class EditTablesComponent implements OnInit, OnDestroy {
 
+  private readonly LOCAL_STORAGE_NAMESPACE_KEY = 'polypheny-namespace';
+
   types: PolyType[] = [];
   schema: string;
   schemaType: string;
@@ -34,6 +41,10 @@ export class EditTablesComponent implements OnInit, OnDestroy {
   selectedStore;
   creatingTable = false;
 
+  activeNamespace: string;
+  namespaces: Namespace[];
+  selectedSchemas = new Map<string, string>(); // name of the table, name of the selected namespace
+
   //export table
   showExportButton = false;
   exportProgress = 0.0;
@@ -79,6 +90,7 @@ export class EditTablesComponent implements OnInit, OnDestroy {
     });
     this.subscriptions.add(sub2);
     this.documentListener();
+    this.updateExistingSchemas();
   }
 
   ngOnDestroy() {
@@ -105,6 +117,25 @@ export class EditTablesComponent implements OnInit, OnDestroy {
     });
   }
 
+  getAvailableSchemas (): Namespace[] {
+    if(!this.namespaces) { return []; }
+    return this.namespaces.filter( (n: Namespace) => {
+      return n.name != this.schema;
+    });
+  }
+
+  private updateExistingSchemas() {
+    this._crud.getSchema(new SchemaRequest('views/querying/console/', false, 1, false)).subscribe(
+        res => {
+          this.namespaces = [];
+          for (const namespace of <Namespace[]>res) {
+              this.namespaces.push(namespace);
+          }
+        }
+    );
+  }
+
+
   getTables() {
     this._crud.getTables(new EditTableRequest(this.schema)).subscribe(
       res => {
@@ -368,6 +399,35 @@ export class EditTablesComponent implements OnInit, OnDestroy {
     }
   }
 
+  transferTable(table : TableModel) {
+    const req = new TransferTableRequest( table.name, this.schema, this.getSelectedSchemaForTable(table), null)
+    this._crud.transferTable( req ).subscribe(
+      res => {
+        const result = <ResultSet>res;
+        if (result.error) {
+          this._toast.exception(result, 'Could not transfer table:');
+        } else {
+          this._toast.success('Transfered table ' + table.name, result.generatedQuery);
+          this.updateExistingSchemas();
+          this.selectedSchemas.delete(table.name);
+          this._leftSidebar.setSchema(new SchemaRequest('/views/schema-editing/', true, 2, false), this._router);
+        }
+        this.getTables();
+      }, err => {
+        this._toast.error('Could not transfer table');
+        console.log(err);
+      }
+    );
+  }
+
+  selectSchemaForTable(table : TableModel, selectedSchema : string) {
+    this.selectedSchemas.set(table.name, selectedSchema);
+  }
+
+  getSelectedSchemaForTable(table : TableModel) {
+    return this.selectedSchemas.get(table.name);
+  }
+
   initSocket() {
     const sub = this._crud.onSocketEvent().subscribe(
       msg => {