MySQL的選擇查詢

Question

可能重複：
MySQL wildcard in select …

選擇icon_ * FROM images WHERE 1

我有三個字段，icon_small，icon_big和icon_large。如何在不手動指定它們的情況下獲得全部三項？

Answer 1

據我所知，你不能。您將不得不手動指定它們。

（見式兩份）

Answer 2

您的SELECT指定他們，但你可以通過做選擇的列清單（然後只能在dynamic SQL使用）：

select column_name from information_schema.columns 
        where table_schema = database() 
         and table_name = 'mytesttable' 
         and column_name like 'icon_%' 

Answer 3

set @qry = (select concat('select ',group_concat(column_name), ' from ' ,table_name) from 
information_schema.columns 
where table_schema = database() 
and table_name = 'your_table_name' 
and column_name like 'icon_%'); 

prepare stmt from @qry; 
execute stmt; 
deallocate prepare stmt;