prova den här:
DELETE FROM Posts_Table
WHERE Post_ID NOT IN
(
SELECT a.Post_ID
FROM
(
SELECT Post_Title, Post_ID
FROM Posts_Table
GROUP BY Post_Title
) a
)
prova den här:
DELETE FROM Posts_Table
WHERE Post_ID NOT IN
(
SELECT a.Post_ID
FROM
(
SELECT Post_Title, Post_ID
FROM Posts_Table
GROUP BY Post_Title
) a
)