sql分组获取第一条或者最小一条值

很多人都在问这个问题,现在记录一下 select id from test as a where id = (select min(b.id ) from test as b where a.pid = b.pid);…

sql版本 select * from (select t.CloseDate,t.ExpiryDate,t.DataTypeLookupID,ROW_NUMBER() over(partition by CloseDate,ExpiryDate,DataTypeLookupID order by CloseDate,ExpiryDate,DataTypeLookupID) as new_index from dbo.IndexVolatilityMarketData t ) a where a…

SQL 分组获取最近（大）一条记录

SELECT MAX( table.Column),.... FROM table.Name WHERE ....... GROUP BY 分组规则…

sql 分组取每组的前n条或每组的n%（百分之n)的数据

sql 分组取每组的前n条或每组的n%(百分之n)的数据 sql keyword: SELECT * ,ROW_NUMBER() OVER(partition by b.UserID order by b.UserID ) rn from b 运行结果:按UserID分组查询出每组条数,rn从1递增 UserID | rn 1 1 1 2 1 3 2 1 2 …

sql分组取第一条数据

sq分组取第一条数据的一个方法: select * from ( select row_number() over(partition by ID order by ID) as rownum , * from table ) as temp…

SQL 分组获取产品前两条记录

select * from ( select *, ROW_NUMBER() over(partition by IPAddress order by recordtime desc) as rowNum from MonitoringSystem ) A order by A.IPAddress, A.recordtime desc 如果表中的数据是以秒记录的但是显示的时候想以分钟显示怎么办 select * from MonitoringSystem where RecordTime…

SQL 分组后获取其中一个字段最大值的整条记录

--有id,name,createDate的一张表testTable--根据name分组,获取每组中createDate最大的那条记录(整条)查询出来---------------------------------------------- 创建一张表,语句如下: CREATE TABLE [dbo].[testTable] ( [id] [int] NOT NULL IDENTITY(1, 1), [name] [nchar] (10) COLLATE Chinese_PRC_CI_AS N…