＃1241-操作数应包含phpmyadmin上的1列

Question

Nested query in Sql.

SELECT
   *,
   (SELECT `supplier_sign_up_id`,
         (
            SELECT
               email_address 
            FROM
               supplier_sign_up 
            WHERE
               supplier_sign_up_id = 42 LIMIT 1
         )
      FROM
         `suppliers_acc` 
      WHERE
         singup_login_id = 138 LIMIT 1
   )
FROM
   `singup_login` 
WHERE
   1;

It's give error-

Operand should contain 1 column(s).

How to resolve it.

Answer 1

Perhaps this does what you want:

SELECT sa.*,
       (SELECT ssu.email_address
        FROM supplier_sign_up ssu
        WHERE ssu.supplier_sign_up_id = 42
        LIMIT 1
       )
FROM suppliers_acc sa
WHERE sa.singup_login_id = 138;

I'm not sure why you are trying to return supplier_sign_up_id from the subquery. You know the value is 42. I suspect you just want email_address .

Answer 2

Try This ,

SELECT *,
    (SELECT `supplier_sign_up_id` FROM suppliers_acc WHERE singup_login_id = 138 LIMIT 1) as supplier_sign_up_id ,
    (SELECT `email_address` FROM supplier_sign_up  WHERE supplier_sign_up_id = 42 LIMIT 1 ) as email_address
FROM
   `singup_login` 
WHERE
   1;