河北测鱼: mysql和mssql比较那个效率高呢? [阅读: 810] 2006-03-04 14:59:13 比如运行这样的语句 select top 20 from a where id not in (select top 2000 from a ) CENTER><IMG SRC='http://www.cz88.net/ip/pic_1.aspx' BORDER='0'></IMG></CENTER>