在mysql中查询select语句

Question

Can we run below query in mysql

SELECT rc.*,(SELECT * 
            from tbl_restaurantMenu 
            where menuCat = rc.id) 
as menu from tbl_restaurantMenuCat as rc;

If not how can we achieve similar result

Answer 1

No, you can't do that. When you use a subquery as a value, it must only return one column and one row, so you can't use SELECT * . You should use a JOIN instead.

SELECT *
FROM tbl_restaurantMenuCat AS rc
LEFT JOIN menu AS m ON rc.id = m.menuCat

I used LEFT JOIN so that this will show restaurants even if they have no matching menus.

Answer 2

Select * will not work this way. You should go for JOIN .

Try below query:

SELECT rc.*,rm.*
FROM tbl_restaurantMenuCat rc
LEFT OUTER JOIN tbl_restaurantMenu rm ON rc.id = rm.menuCat

Hope it helps!