Question

I’m trying to cross-check a row that exists in two tables using a MySQL query in phpmyadmin and then, if a userID is found in both tables, insert their userID and user name into another table. Here’s my code:

INSERT INTO userswithoutmeetings
SELECT user.userID
IF('user.userID'='meeting.userID');

I keep getting plagued by this error:

#1064 - You have an error in your SQL syntax; check the manual that corresponds
 to your MySQL server version for the right syntax to use near    
'IF('user.userID'='meeting.userID')' at line 3

Other statements I’ve tried have worked but not deposited the values in the table.

Answer 1

Something like

INSERT INTO userswithoutmeetings(userId,userName)
SELECT DISTINCT a.userId, a.userName
FROM table1 a 
INNER JOIN table2 b ON (a.userId = b.userId)