标签：style blog color ar div log sp on c
空格比较时 空字符串跟任意长度的半角空格字符串比较，结果都为TRUE
DECLARE @TRUSTOR VARCHAR(5) SET @TRUSTOR = ‘‘ IF @TRUSTOR IS NULL BEGIN SELECT ‘IS NULL‘ END IF @TRUSTOR = SPACE(5) BEGIN SELECT ‘‘‘‘‘ = SPACE5‘ END -- 执行结果：‘‘ = SPA
标签：style blog color ar div log sp on c
原文地址：http://www.cnblogs.com/Ryukaka/p/3937409.html
