Question

delete from tbl_savedgroupmessage, tbl_savedusermessage, tbl_message where tbl_savedgroupmessage.msgid= tbl_savedusermessage.msgid= tbl_message.msgid= ‘876’

I tried this but it throws error

Answer 1

Try this one –

DELETE t1, t2, t3
FROM
  tbl_savedgroupmessage t1
JOIN tbl_savedusermessage t2
  ON t1.msgid = t2.msgid
JOIN tbl_message t3
  ON t1.msgid = t3.msgid
WHERE
  t3.msgid = '876'

Example:

CREATE TABLE table_a (
  id INT(11) DEFAULT NULL
);

CREATE TABLE table_b (
  id INT(11) DEFAULT NULL
);

INSERT INTO table_a VALUES 
  (2),
  (3),
  (1);

INSERT INTO table_b VALUES 
  (2),
  (5),
  (1);

DELETE t1, t2
FROM
  table_a t1
JOIN table_b t2
  ON t1.id = t2.id
WHERE
  t1.id = 1;


SELECT * FROM table_a;
+------+
| id   |
+------+
|    2 |
|    3 |
+------+

SELECT * FROM table_b;
+------+
| id   |
+------+
|    2 |
|    5 |
+------+