MYSQL 语法 - 如何在查询中使用带条件语句的 where 查询 [重复]

Question

:

Can you use an alias in the WHERE clause in mysql? (5 answers)

Using column alias in WHERE clause of MySQL query produces an error (7 answers)

Closed 7 months ago .

This is what i'm trying to query for example:

Code Example:

SELECT  IF(MAIN.PROCESS = 0,"YES","NO") AS `SUCCESS_LOG`, FROM `XLSX_UPLOAD` AS MAIN  WHERE `SUCCESS_LOG` LIKE 'NO'

Unfortunately, I cannot find what I'm doing wrong other than it's something related to the WHERE condition search.

Answer 1

Since SUCCESS_LOG is not a real field, you need to use HAVING to check on it.

HAVING `SUCCESS_LOG` LIKE 'NO'

Though, in this query, I would just check your MAIN.PROCESS (again). That would probably be more efficient.

WHERE `MAIN`.`PROCESS` = 0