原文:
mssql sqlserver 验证整型函数分享
转自:http://www.maomao365.com/?p=6227
摘要:
下文将制作一个isnumber验证整型的函数，供在sql脚本中做数值判断，如下所示:
例:
实现原理:判断 是否包含特殊字符，是否全部为0-9的自然数组成
CREATE FUNCTION dbo.check_number ( /*验证一字符串类型是否为整型数值类型*/ @checkTmp VARCHAR(100) ) RETURNS BIT BEGIN DECLARE @tmp BIT IF LEFT(@checkTmp, 1) = '-' SET @checkTmp = SUBSTRING(@checkTmp, 2, LEN(@checkTmp)) IF (PATINDEX('%[^0-9-]%', @checkTmp) = 0 AND CHARINDEX('-', @checkTmp) <= 1 AND @checkTmp NOT IN ('.', '-', '+', '^') AND LEN(@checkTmp)>0 AND @checkTmp NOT LIKE '%-%') SET @tmp = 1 ELSE SET @tmp = 0 RETURN @tmp END GO /*数据验证*/ SELECT '878' [测试数值],dbo.check_number('999') [测试返回值]; SELECT 'testData' [测试数值],dbo.check_number('abc') [测试返回值]; SELECT '8-8' [测试数值],dbo.check_number('9+9') [测试返回值]; SELECT '8.9' [测试数值],dbo.check_number('$9.9') [测试返回值]; SELECT 'maomao365.com' [测试数值],dbo.check_number('maomao365.com') [测试返回值]; go drop function check_number
