Type checking

Database type supports int and string.
Support them

## memorize

```golang
bool

string

int  int8  int16  int32  int64
uint uint8 uint16 uint32 uint64 uintptr

byte

rune

float32 float64

complex64 complex128
```

```SQL
:binary
:boolean
:date
:datetime
:decimal
:float
:integer
:primary_key
:string
:text
:time
:timestamp
```