來自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 推薦指數:
來自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 ...
------------------------------------------------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 ...
SELECT to_char(wm_concat(to_char(name))) FROM student; 需要使用兩次to_char,否則結果是clob類型 ...
); 通過archival_code分組 ,取順序號的最大值。 ...
Oracle 把某一個字段合並到一起 column1 column2 column3 id_1 name_1 lable_1 id_1 name_1 lable_2 變為 column1 column2 column3 id_1 name_1 ...