add an entire version mysql_allcode

mysql_allcode.txt

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+SET SQL_SAFE_UPDATES = 0;
+
+-- 创建公司数据库表格
+DROP TABLE `student`;
+
+CREATE TABLE `employee`(
+	`emp_id` INT PRIMARY KEY,
+    `name` VARCHAR(20),
+    `birth_date` DATE,
+    `sex` VARCHAR(1),
+    `salary` INT,
+    `branch_id` INT,
+    `sup_id` int
+    );
+
+CREATE TABLE `branch`(
+	`branch_id` INT PRIMARY KEY,
+    `branch_name` VARCHAR(20),
+    `manager_id` INT,
+    FOREIGN KEY (`manager_id`) REFERENCES `employee` (`emp_id`) ON DELETE SET NULL
+);
+
+ALTER TABLE `employee`
+ADD FOREIGN KEY(`branch_id`)
+REFERENCES `branch`(`branch_id`)
+ON DELETE SET NULL;
+
+ALTER TABLE `employee`
+ADD FOREIGN KEY(`sup_id`)
+REFERENCES `employee`(`emp_id`)
+ON DELETE SET NULL;
+
+CREATE TABLE `client`(
+	`client_id` INT PRIMARY KEY,
+    `client_name` VARCHAR(20),
+    `phone` VARCHAR(20)
+);
+
+CREATE TABLE `works_with`(
+	`emp_id` INT,
+    `client_id` INT,
+    `total_sales` INT,
+    PRIMARY KEY(`emp_id`,`client_id`),
+    FOREIGN KEY(`emp_id`) REFERENCES `employee`(`emp_id`) ON DELETE SET NULL,
+    FOREIGN KEY(`client_id`) REFERENCES `client`(`client_id`) ON DELETE CASCADE
+);
+
+INSERT INTO `branch` VALUES(1, '研发', NULL);
+INSERT INTO `branch` VALUES(2, '行政', NULL);
+INSERT INTO `branch` VALUES(3, '资讯', NULL);
+
+select * from `branch`;
+
+
+INSERT INTO `employee` VALUES(206, '小黄', '1998-10-08', 'F', 50000, 1, NULL);
+INSERT INTO `employee` VALUES(207, '小绿', '1985-09-16', 'M', 29000, 2, 206);
+INSERT INTO `employee` VALUES(208, '小黑', '2000-12-19', 'M', 35000, 3, 206);
+INSERT INTO `employee` VALUES(209, '小白', '1997-01-22', 'F', 39000, 3, 207);
+INSERT INTO `employee` VALUES(210, '小兰', '1942-11-10', 'F', 84000, 1, 207);
+
+select * from `Employee`;
+
+UPDATE `branch`
+SET `manager_id` = 206
+WHERE `branch_id` = 1;
+
+UPDATE `branch`
+SET `manager_id` = 207
+WHERE `branch_id` = 2;
+
+UPDATE `branch`
+SET `manager_id` = 208
+WHERE `branch_id` = 3;
+
+INSERT INTO `client` VALUES(400, '阿狗', '254354335');
+INSERT INTO `client` VALUES(401, '阿猫', '25633899');
+INSERT INTO `client` VALUES(402, '旺来', '45354345');
+INSERT INTO `client` VALUES(403, '露西', '54354365');
+INSERT INTO `client` VALUES(404, '艾瑞克', '18783783');
+
+
+INSERT INTO `works_with` VALUES(206, 400, '70000');
+INSERT INTO `works_with` VALUES(207, 401, '24000');
+INSERT INTO `works_with` VALUES(208, 402, '9800');
+INSERT INTO `works_with` VALUES(208, 403, '24000');
+INSERT INTO `works_with` VALUES(210, 404, '87940');
+
+-- 1.1 去得员工的资料
+SELECT * FROM `employee`;
+
+-- 1.2 取得客户资料
+SELECT * FROM `client`;
+
+-- 2.1 按薪水从低到高取得员工资料
+SELECT * FROM `employee` ORDER BY `salary`;
+
+-- 2.2 按薪水从高到低取得员工资料
+SELECT * FROM `employee` ORDER BY `salary` DESC;
+
+-- 2.3 按性别从低到高取得员工资料(A是最小的，Z是最大的)
+SELECT * FROM `employee` ORDER BY `sex`;
+
+-- 2.4 按性别从低到高的薪水，取得员工资料
+SELECT * FROM `employee` ORDER BY `sex`, `salary` DESC;
+
+-- 2.5. 取得薪水前3高的员工
+SELECT * FROM `employee` ORDER BY `SALARY` DESC LIMIT 3;
+
+-- 2.6 取得所有员工名字
+SELECT `name` FROM `employee`;
+
+-- 3.1 员工性别去重
+SELECT DISTINCT `sex` FROM `employee`;
+
+-- 4.1 取得员工人数
+SELECT COUNT(*) FROM `employee`;
+
+-- 4.2 去Employee这个表里看，有sup_id的属性的record有几笔
+SELECT COUNT(`sup_id`) FROM `employee`;
+
+-- 4.3 取得出生于1970-01-01之后的女性员工人数
+SELECT COUNT(*) FROM `employee` WHERE `birth_date` > '1970-01-01' AND `sex` = 'F';
+
+-- 4.4 取得所有员工的平均薪水
+SELECT AVG(`salary`) FROM `employee`;
+
+-- 4.5 取得所有员工的薪水总和
+SELECT SUM(`salary`) FROM `employee`;
+
+-- 4.6 取得薪水最高的员工
+SELECT MAX(`salary`) FROM `employee`;
+
+-- 4.7 取得薪水最低的员工
+SELECT MIN(`salary`) FROM `employee`;
+
+-- Wildcard
+SELECT * FROM `client` WHERE `cliEnt_name` LIKE '%艾%';
+
+SELECT * FROM `employee` WHERE `birth_date` LIKE'_____09%';
+
+SELECT `name`, `sex` FROM `employee` UNION SELECT `client_name` FROM `client` UNION SELECT `branch_name` FROM `branch`;
+
+SELECT `emp_id` AS `total_id`, `name` AS `total_name` FROM `employee` UNION SELECT `client_id`, `client_name` FROM `client`;
+
+SELECT `salary` AS `total_money` FROM `employee` UNION SELECT `total_sales` FROM `works_with`;
+
+-- 新写一句话
+INSERT INTO `branch` VALUES(4, '偷懒', NULL);
+
+-- 取得部门所有经理的名字
+SELECT `emp_id`, `name`, `branch_name` 
+FROM `employee` RIGHT JOIN `branch` 
+ON `employee`.`emp_id` = `branch`.`manager_id`;
+
+SELECT `name` FROM `employee` WHERE `emp_id`= (
+	SELECT `manager_id`
+    FROM `branch` 
+    WHERE `branch_name` = '研发'
+);
+
+
+SELECT `name`
+FROM `employee`
+WHERE `emp_id` IN(
+	SELECT `emp_id`
+	FROM `works_with`
+	WHERE `total_sales` > 50000
+);
+
+DELETE FROM `employee`
+WHERE `emp_id` = 207;
+
+SELECT * FROM `branch`;
+
+SELECT * FROM `works_with`;
+