Question

How to fix this error

[Err] 1093 - You can't specify target table 'user_log' for update in FROM clause

DELETE 
  user_log
FROM
  user_log
WHERE
  UpdateDate < (SELECT MAX(UpdateDate) 
    FROM user_log 
    AS lookup 
    WHERE Email = user_log.Email)

Let me know

Answer 1

if you want to delete data of table then you use:

delete from [table] where [condition].

also for max you have to group your data first.

DELETE 
FROM
  user_log
WHERE
  UpdateDate < (SELECT MAX(UpdateDate) 
    FROM user_log 
    GROUP BY Email
    HAVING Email = user_log.Email)

when you want to use a condition on a group by then you have to use having instead of where.