SQL substring、replace函数

UPDATE dbo.DEVICE_BIT_NUMBER
SET code  = substring(code,1,1) + substring(code,6,5) +substring(code,2,4) + substring(code,11,4) 
WHERE CODE LIKE '%ZNZM%';


UPDATE dbo.DEVICE_BIT_NUMBER
SET code  = replace(code ,'-','_') WHERE CODE LIKE '%ZNZM%';

SELECT substring(code,1,1) FROM DEVICE_BIT_NUMBER

注：substring获取的字符串从1开始，非0！