方法一:(效率最高)select * from test as a where typeindex = (select max(b.typeindex) from test as b where ...
SQL 分组后获取其中一个字段最大值的整条记录 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. from test a, select type,max typeindex typeindex from ...
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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 ...
------------------------------------------------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 ...
); 通过archival_code分组 ,取顺序号的最大值。 ...
1、 SELECT wmsys.wm_concat(t.org) orgs, t.area_nameFROM (SELECT concat(concat(b.abbreviation, '-'), ...
来自https://blog.csdn.net/gaoyao99409/article/details/19003729 select m.parent_id, m.st ...
方法一 select t1.a,t1.b,t1.c from test t1 inner join (seelct a,max(b) as b from test group ...
场景:sql server 2008 目标: select COUNT(*) from ID group by code 产生code列唯一的3行数据,并显示最小的D列数据 方案1: select code,MIN(D)from ID group ...