MySQL的选择查询

Question

可能重复：
MySQL wildcard in select …

选择icon_ * FROM images WHERE 1

我有三个字段，icon_small，icon_big和icon_large。如何在不手动指定它们的情况下获得全部三项？

Answer 1

据我所知，你不能。您将不得不手动指定它们。

（见式两份）

Answer 2

您的SELECT指定他们，但你可以通过做选择的列清单（然后只能在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;