以下查询运行正常,但我想输入一个选项,如果返回的电子邮件是NULL,那么我输入“example@google.com”或类似的东西.我已经阅读了一些函数,比如COALESCE(EMAIL,“example@google.com”),但我不确定该函数在脚本中的位置.你能指点一下我应该在哪里注入这个功能吗?我是否正朝着正确的方向前进?谢谢.
SELECT LCASE(LOGIN_NAME) as uniqueid, CONCAT('sha-512:', PASSWD) as password, REPLACE(CONTACT_NAME, '"', '') as name, \
CONCAT('unit,', \
MAX(CASE WHEN USER_TYPE = 'custom' THEN \
'location_employee' \
WHEN (LOGIN_NAME != 'link' AND USER_TYPE = 'owner' AND (UA.PARTY_SITE_ID IS NULL OR NOT EXISTS (SELECT U2.ID FROM CUSTOMER_DATA.USER_ACCESS U2 WHERE U2.USER_ID=U.ID AND (U2.PARTY_SITE_ID IS NULL OR U2.PARTY_SITE_ID = '')) ) )THEN \
'master' \
ELSE \
'location' \
END)) AS role, \
MAX(EMAIL) as email, \
MAX(PHONE) as phone, \
MAX(FAX) as fax \
FROM ORACLE_EXPORTS.SHIP_TO ST, \
CUSTOMER_DATA.USER U \
JOIN CUSTOMER_DATA.USER_ACCESS UA ON U.ID = UA.USER_ID \
WHERE ( \
(UA.PARTY_SITE_ID IS NULL AND ST.CUSTOMER_ID = UA.CUSTOMER_ID ) \
OR \
(ST.PARTY_SITE_ID IS NOT NULL AND ST.PARTY_SITE_ID = UA.PARTY_SITE_ID ) \
) \
AND U.LOGIN_NAME IN ( ? ) \
GROUP BY LOGIN_NAME
解决方法:
使用MySQL的IFNULL功能,
IFNULL(MAX(EMAIL), "example@google.com") as email