This is the query I tried to write
select posts.* ,users.* FROM posts INNER JOIN users ON posts.user_id = users.id WHERE posts.user_id != '27' AND posts.pid EXISTS(SELECT post_id FROM favourites WHERE posts.pid=favourites.post_id)
This is an error
select posts.* ,users.* FROM posts INNER JOIN users ON posts.user_id = users.id WHERE posts.user_id != '27' AND posts.pid EXISTS(SELECT post_id FROM favourites WHERE posts.pid=favourites.post_id) LIMIT 0, 25 MySQL said: Documentation #1064 - You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'EXISTS(SELECT post_id FROM favourites WHERE posts.pid=favourites.post_id) LIM...' at line 6
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You must use
INinstead of ÈXISTS.The syntax of exists is different
SELECT posts.*, users.* FROM posts INNER JOIN users ON posts.user_id = users.id WHERE posts.user_id != '27' AND posts.pid IN (SELECT post_id FROM favourites WHERE posts.pid = favourites.post_id) LIMIT 0 , 25This will check if there is a favorite post id
SELECT posts.*, users.* FROM posts INNER JOIN users ON posts.user_id = users.id WHERE posts.user_id != '27' AND EXISTS (SELECT post_id FROM favourites WHERE posts.pid = favourites.post_id) LIMIT 0 , 25