存储过程
CREATE   PROCEDURE   Insert_EstateAge  

@EstateAge   nvarchar(64)
AS
IF   EXISTS(SELECT   EstateAgeID   FROM   EstateAge   WHERE   EstateAge   =   @EstateAge)
BEGIN
SELECT   -1
RETURN
END
INSERT   INTO   EstateAge(EstateAge)
VALUES(@EstateAge)  

SELECT   @@IDENTITY
RETURN

这是我写的存储过程，当输入     <1   或   2-3   这样的字符串就有问题了，怎么改啊？


------解决方案--------------------
CREATE PROCEDURE Insert_EstateAge

@EstateAge nvarchar(64)
AS
begin
declare @sql varchar(4000)

set @sql =
'
IF EXISTS(SELECT EstateAgeID FROM EstateAge WHERE EstateAge ' + convert(nvarchar(20), @EstateAge) + ')
BEGIN
SELECT -1
RETURN
END

INSERT INTO EstateAge(EstateAge) VALUES(@EstateAge)
SELECT @@IDENTITY
'

exec sp_executesql @sql
end
go

注意这样改的话你传入的应该是一个表达式。
比如查找等于23的情况：exec Insert_EstateAge '=23 '