我的SQL查询有什么问题？

Question

what;s wrong with my query ...

i get the error message #1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '. mail_time FROM ibc_messages m , ibc_msg_queue q AND m . id = q . msgid AND q' at line 1

SELECT distinct q.msgid, q.mail_time, m.status,
FROM ibc_msg_queue q , ibc_messages m
WHERE q.mail_time = '0000-00-00 00:00:00' AND q.msgid = m.id
ORDER BY q.msgid

Answer 1

在第三列后删除逗号

SELECT distinct q.msgid , q.mail_time,m.status FROM

Answer 2

在“ FROM”子句之前，您要使用逗号

Answer 3

You have a redundant comma ( , ) before your FROM keyword. Just remove it, and you should be fine:

SELECT distinct q.msgid , q.mail_time,m.status
FROM ibc_msg_queue q , ibc_messages m
WHERE q.mail_time = '0000-00-00 00:00:00' AND q.msgid = m.id ORDER BY q.msgid

Answer 4

You have an extra comma in there:

YOURS:

SELECT distinct q.msgid , 
       q.mail_time,
       m.status, 
FROM ibc_msg_queue q , ibc_messages m
WHERE q.mail_time = '0000-00-00 00:00:00' 
  AND q.msgid = m.id 
ORDER BY q.msgid