我想在WHERE的过滤子句下使用If Else (或类似的情况确定技术:) 。这是我的示例代码。
select * from some_table
where
record_valid_flg = 1 and
if(user_param = '1')
then age > 20
else
name like 'Mr%'
end if
我怎么能弄清楚。我真的很感激任何建议..谢谢!
CASE WHEN user_param = '1' THEN age > 20 ELSE name like 'Mr%' END
尝试使用CASE;
SELECT * from some_table
WHERE record_valid_flg = 1
AND
CASE
WHEN (user_param = '1') THEN age > 20
ELSE name like 'Mr%'
END
像这样使用 CASE:
select * from some_table
where
record_valid_flg = 1
and CASE
WHEN user_param = '1' THEN age > 20
ELSE name like 'Mr%'
END;
你可以简单地这样做
SELECT
*
FROM some_table
WHERE record_valid_flg = 1
AND IF(user_param = '1', age > 20, name LIKE 'Mr%')