1、 SELECT wmsys.wm_concat(t.org) orgs, t.area_nameFROM (SELECT concat(concat(b.abbreviation, '-'), ...
来自https: blog.csdn.net gaoyao article details select m.parent id, m.start date,wmsys.wm concat m.cleck name As name,wmsys.wm concat m.userId As userId, max rowid as rid from select t.parent id, to cha ...
2018-07-02 16:47 0 1925 推荐指数:
1、 SELECT wmsys.wm_concat(t.org) orgs, t.area_nameFROM (SELECT concat(concat(b.abbreviation, '-'), ...
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 ...