MySql Inner Join with WHERE clause [closed]

问题

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Closed 6 years ago.

Here is my code:

 SELECT table1.f_id  FROM table1 WHERE table1.f_com_id = '430' AND      
 table1.f_status = 'Submitted' 
 INNER JOIN table2
 ON table2.f_id = table1.f_id
 where table2.f_type = 'InProcess'

I need information from table1 as all the id associated with f_com_id as 430 and status as submitted and the type should be only in process which is stored in other table(table2)

f_id is p_key and f_key in both the tables.
But this giving me errors, I think I am placing the WHERE clause wrong, how to fix it.?

Error msg: #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 'INNER JOIN table2 ON table2.f_id = ' at line 2

回答1:

Yes you are right. You have placed WHERE clause wrong. You can only use one WHERE clause in single query so try AND for multiple conditions like this:

 SELECT table1.f_id  FROM table1 
   INNER JOIN table2
     ON table2.f_id = table1.f_id
 WHERE table2.f_type = 'InProcess'
   AND f_com_id = '430'
   AND f_status = 'Submitted' 

回答2:

1. Change the INNER JOIN before the WHERE clause.
2. You have two WHEREs which is not allowed.

Try this:

SELECT table1.f_id FROM table1
  INNER JOIN table2 
     ON (table2.f_id = table1.f_id AND table2.f_type = 'InProcess') 
   WHERE table1.f_com_id = '430' AND table1.f_status = 'Submitted'

回答3:

You could only write one where clause.

 SELECT table1.f_id  FROM table1
 INNER JOIN table2
 ON table2.f_id = table1.f_id
 where table1.f_com_id = '430' AND      
 table1.f_status = 'Submitted' AND table2.f_type = 'InProcess'

回答4:

You are using two WHERE clauses but only one is allowed. Use it like this:

SELECT table1.f_id FROM table1
INNER JOIN table2 ON table2.f_id = table1.f_id
WHERE
  table1.f_com_id = '430'
  AND table1.f_status = 'Submitted'
  AND table2.f_type = 'InProcess'

来源：https://stackoverflow.com/questions/12364602/mysql-inner-join-with-where-clause