SQL Server中对数据截取替换的方法详解

CREATE DATABASE TEST
GO
USE TEST
GO
CREATE TABLE TestTable
(
UserName VARCHAR(50),
UserPwd VARCHAR(50)
)
GO
INSERT INTO TestTable (UserName,UserPwd) VALUES ('ASDFFFF','WWWEEE')
INSERT INTO TestTable (UserName,UserPwd) VALUES ('ASDFFFF','WWWEEE')
INSERT INTO TestTable (UserName,UserPwd) VALUES ('ASDFFFF','WWWEEE')
INSERT INTO TestTable (UserName,UserPwd) VALUES ('ASDFFFF','WWWEEE')
INSERT INTO TestTable (UserName,UserPwd) VALUES ('ASDFFFF','WWWEEE')