------------------------------------------------有id,name,createDate的一張表testTable--根據name分組,獲取每組中createDate最大的那條記錄(整條)查詢 ...
方法一 selectt .a,t .b,t .c fromtestt innerjoin seelcta,max b asbfromtestgroupbya t ont .a t .aandt .b t .b 方法二 select from select t. , row number over partition by 分組字段 order by 排序字段 desc rnfrom tablena ...
2016-12-01 19:35 0 1928 推薦指數:
------------------------------------------------有id,name,createDate的一張表testTable--根據name分組,獲取每組中createDate最大的那條記錄(整條)查詢 ...
SQL 分組后獲取其中一個字段最大值的整條記錄 方法一:(效率最高)select * from test as a where typeindex = (select max(b.typeindex) from test as b where a.type = b.type ...
方法一:(效率最高)select * from test as a where typeindex = (select max(b.typeindex) from test as b where ...
--有id,name,createDate的一張表testTable--根據name分組,獲取每組中createDate最大的那條記錄(整條)查詢出來---------------------------------------------- 創建一張表,語句如下: CREATE TABLE ...
select * from ( select last_comment, row_number() over(partition by employeeid,roadline,stationname ...
場景:sql server 2008 目標: select COUNT(*) from ID group by code 產生code列唯一的3行數據,並顯示最小的D列數據 方案1: select code,MIN(D)from ID group ...
獲取分組后取某字段最大一條記錄方法一:(效率最高)select * from test as awhere typeindex = (select max(b.typeindex)from test as bwhere a.type = b.type );方法二:(效率次之)selecta. ...
sqlserver2005前: --分組取最大最小常用sql--測試環境if OBJECT_ID('tb') is not null drop table tb;gocreate table tb( col1 int, col2 int, Fcount int)insert ...