mysql中的两个表，如何从这些表中获取数据

Question

I have two tables..

Client Bills - Contains bill infor for clients

from billRecievedFromClient - contains the amount we receievd from client for a bill

mysql> select * from clientBills;

+------------+------------+------------+------------+

| date | clientCode | billNumber | billAmount |

+------------+------------+------------+------------+

| 2012-02-17 | C0001 | B0001 | 1200.00 |

| 2012-02-17 | C0001 | B0002 | 1000.00 |

| 2012-02-17 | C0002 | B0003 | 1233.00 |

| 2012-02-18 | C0003 | B0004 | 12000.00 |

| 2012-02-18 | C0001 | B0005 | 400.00 |

+------------+------------+------------+------------+

mysql> select * from billRecievedFromClient;

+------------+--------------+---------------+--------+---------+

| Date | receivedCode | forBillNumber | amount | remarks |

+------------+--------------+---------------+--------+---------+

| 2012-02-18 | R0001 | B0001 | 200.00 | CASH |

| 2012-02-18 | R0002 | B0001 | 300.00 | CASH |

| 2012-02-18 | R0003 | B0002 | 300.00 | CASH |

| 2012-02-18 | R0004 | B0003 | 233.00 | CASH |

| 2012-02-18 | R0005 | B0001 | 700.00 | CASH |

+------------+--------------+---------------+--------+---------+

Now i want Information Like this --- ie for client C0001 , there are 3 bills. And he made payment for one bill completelly, for one bill partially and one bill complete amount is due..

+------------+------------+------------------------------------+

| billNumber | billAmount | SUM(billRecievedFromClient.amount) |

+------------+------------+------------------------------------+

| B0001 | 1200.00 | 1200.00 |

| B0002 | 1000.00 | 300.00 |

| B0005 | 400.00 | 00.00 |

+------------+------------+------------------------------------+

remember since he not started payment for third bill, there wont be any entry for that in second table..

What can be the query for this??

please suggest..

Thanks a lot!!

Answer 1

Use LEFT JOIN

SELECT *, SUM(t2.amount) FROM clientBills t1 LEFT JOIN billRecievedFromClient t2 ON t1.billNumber = t2.forBillNumber

Anyway There won't be record for non started bills. But if u want NULL record for non started bills u can add at the end of query : GROUP BY t1.billNumber