来自https://blog.csdn.net/gaoyao99409/article/details/19003729 select m.parent_id, m.st ...
SELECT wmsys.wm concat t.org orgs, t.area nameFROM SELECT concat concat b.abbreviation, , b.org name org,a.area name area nameFROM t organization bleft join t area store aon a.store code b.unit idWHE ...
2018-07-02 17:37 0 816 推荐指数:
来自https://blog.csdn.net/gaoyao99409/article/details/19003729 select m.parent_id, m.st ...
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 ...
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 a where typeindex = (select max(b.typeindex) from test as b where a.type = b.type ...
SELECT to_char(wm_concat(to_char(name))) FROM student; 需要使用两次to_char,否则结果是clob类型 ...
); 通过archival_code分组 ,取顺序号的最大值。 ...
Oracle 把某一个字段合并到一起 column1 column2 column3 id_1 name_1 lable_1 id_1 name_1 lable_2 变为 column1 column2 column3 id_1 name_1 ...