MSSQL中怎么實(shí)現(xiàn)多字段根據(jù)范圍求最大值

本篇文章給大家分享的是有關(guān)MSSQL中怎么實(shí)現(xiàn)多字段根據(jù)范圍求最大值，小編覺得挺實(shí)用的，因此分享給大家學(xué)習(xí)，希望大家閱讀完這篇文章后可以有所收獲，話不多說，跟著小編一起來看看吧。

-->Title:生成測試數(shù)據(jù)-->Author:wufeng4552-->Date :2009-09-21 15:08:41declare @T table([Col1] int,[Col2] int,[Col3] int,[Col4] int,[Col5] int,[Col6] int,[Col7] int)Insert @Tselect 1,10,20,30,40,50,60 union allselect 2,60,30,45,20,52,85 union allselect 3,87,56,65,41,14,21--方法1select [col1], max([col2])maxcolfrom(select [col1],[col2] from @t  union all select [col1],[col3] from @t  union all select [col1],[col4] from @t union all select [col1],[col5] from @t union all select [col1],[col6] from @t union all select [col1],[col7] from @t)Twhere [col2] between 20 and 60 --條件限制group by [col1]/*col1 maxcol----------- -----------1 602 603 56

(3 個資料列受到影響)

*/--方法2select [col1], (select max([col2])from  ( select [col2]  union all select [col3] union all select [col4] union all select [col5] union all select [col6] union all select [col7]  )T where [col2] between 20 and 60) as maxcol --指定查詢範(fàn)圍from @t/*(3 個資料列受到影響)col1 maxcol----------- -----------1 602 603 56*/

以上就是MSSQL中怎么實(shí)現(xiàn)多字段根據(jù)范圍求最大值，小編相信有部分知識點(diǎn)可能是我們?nèi)粘９ぷ鲿姷交蛴玫降?。希望你能通過這篇文章學(xué)到更多知識。更多詳情敬請關(guān)注億速云行業(yè)資訊頻道。