Multiple-table Delete Limit

I'm trying to run following query but it throws an error. DELETE b FROM parim_lang a JOIN parim_lang b ON b.lang_hash = a.lang_hash AND b.lang_language = SUBSTRING(a.la

Solution 1:

Try :

DELETE
FROM parim_lang a
WHERE a.lang_hash IN (
SELECT a.lang_hash 
FROM parim_lang a
JOIN parim_lang b 
    ON b.lang_hash = a.lang_hash 
    AND b.lang_language = SUBSTRING(a.lang_google_translation, LOCATE('-', a.lang_google_translation) + 1)
WHERE a.lang_google_translation REGEXP '^[a-z]+-[a-z]+' ) LIMIT 20