SQL Server 编写自动增长的字符串型主键

1、编写标量值函数ICONVERT2STRING

CREATE FUNCTION ICONVERT2STRING(@N INT,@F INT) RETURNS VARCHAR(10) AS
BEGIN
DECLARE @M INT
DECLARE @L0 INT
DECLARE @CH VARCHAR(10)
DECLARE @ST VARCHAR(20)
SELECT @CH=''
SELECT @ST=CONVERT(VARCHAR(10),@N)
SELECT @ST=RTRIM(@ST)
SELECT @L0=LEN(@ST)
SELECT @M=1
WHILE (@M