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把下面SQL里的SELECT单独执行,没有问题,但是用来CREATE VIEW 就报错了.
代码如下:
CREATE OR REPLACE VIEW BLOG_V_ADMIN
(ID,NICKNAME,SEX,EMAIL,PHONE,QQ,MSN,HTTP,REGISTER_TIME,
IP,LAST_LOGIN_IP,LOGIN_TIME)
AS
SELECT
A.ID,A.NICKNAME,A.SEX,A.EMAIL,A.PHONE,A.QQ,A.MSN,A.HTTP,A.REGISTER_TIME,
B.IP AS LAST_LOGIN_IP,B.LOGIN_TIME AS LAST_LOGIN_TIME
FROM
BLOG_ADMIN A LEFT JOIN
BLOG_ADMIN_LOGIN_TRACK B ON B.ADMIN = A.ID LEFT JOIN
(SELECT ADMIN,MAX(LOGIN_TIME) AS LOGIN_TIME FROM BLOG_ADMIN_LOGIN_TRACK GROUP BY ADMIN) C ON B.ADMIN = C.ADMIN;
ERROR 1349 (HY000): View's SELECT contains a subquery in the FROM clause
这是BUG吗?见:http://bugs.mysql.com/bug.php?id=16757
木有办法,我只好这样改了:
代码如下:
CREATE OR REPLACE VIEW BLOG_V_ADMIN
(ID,NICKNAME,SEX,EMAIL,PHONE,QQ,MSN,HTTP,REGISTER_TIME,
LOGIN_TIME,LAST_LOGIN_IP)
AS
SELECT
A.ID,A.NICKNAME,A.SEX,A.EMAIL,A.PHONE,A.QQ,A.MSN,A.HTTP,A.REGISTER_TIME,
(SELECT LOGIN_TIME FROM BLOG_ADMIN_LOGIN_TRACK WHERE ADMIN = A.ID ORDER BY LOGIN_TIME DESC LIMIT 1) AS LAST_LOGIN_TIME,
(SELECT INET_NTOA(IP) FROM BLOG_ADMIN_LOGIN_TRACK WHERE ADMIN = A.ID ORDER BY LOGIN_TIME DESC LIMIT 1) AS LAST_LOGIN_IP
FROM
BLOG_ADMIN A;