Data type  Range  Storage  
bigint 
 -2^63 (-9,223,372,036,854,775,808) to 2^63-1 (9,223,372,036,854,775,807), 19位有效數字
 8 Bytes

	萬用序號ID, ttyyyymmddhhnnssqqqq, TT(標籤不含在欄位內容中), (時間(14)+序號(4)=18位)

 
int 
 -2^31 (-2,147,483,648) to 2^31-1 (2,147,483,647), 10位有效數字
 4 Bytes
 
smallint 
 -2^15 (-32,768) to 2^15-1 (32,767)
 2 Bytes
 
tinyint 
 0 to 255
 1 Byte