SQL 连接三个表并拆分成列

Question

我有三个table，mess_stock，mess_voucher，add_grocery。

Mess_stock下面是table,

+-----+------------+-----------------+-----------------+--------+---------+---------+------------+----------+
| sno | voucher_id | particular_name | opening_balance | inward | outward | balance | pay_amount | pay_type |
+-----+------------+-----------------+-----------------+--------+---------+---------+------------+----------+
|  49 |          5 | 4               |             100 |     10 |     100 |      10 |      10.00 |        1 |
|  50 |         17 | 5               |             111 |     10 |      20 |     101 |      60.00 |        1 |
|  51 |          7 | 3               |             123 |      2 |       1 |     124 |     300.00 |        1 |
|  52 |          7 | 1               |             123 |     20 |      20 |     123 |     500.00 |        2 |
|  53 |         14 | 8               |             100 |      5 |      95 |      10 |      60.00 |        2 |
+-----+------------+-----------------+-----------------+--------+---------+---------+------------+----------+

Mess_vouchertable低于

+------------+--------------+--------------+
| voucher_id | voucher_name | voucher_date |
+------------+--------------+--------------+
|          5 | VG1001       | 2015-02-19   |
|          6 | VG1001       | 2015-02-20   |
|          7 | VG1002       | 2015-02-20   |
|          8 | VG1002       | 2015-02-19   |
|          9 | MS1001       | 2015-02-20   |
|         10 | VG10012      | 2015-02-19   |
|         11 | 0            | 2015-02-23   |
|         12 | 1            | 2015-02-24   |
|         13 | MS1001       | 2015-02-25   |
|         14 | MS1001       | 2015-02-28   |
|         15 | VG1003       | 2015-02-28   |
|         16 | MS1001       | 2015-02-19   |
|         17 | MS1001       | 2015-02-21   |
+------------+--------------+--------------+

Add_grocerytable低于

+-----+-----------------+------------------+
| sno | particular_name | particular_price |
+-----+-----------------+------------------+
|   1 | Rice            |            25.00 |
|   3 | Mango           |           150.00 |
|   4 | Coconut         |            22.00 |
|   5 | Banana          |             6.00 |
|   6 | Raddish         |            12.00 |
|   7 | Apple           |           150.00 |
|   8 | Pumkin          |            12.00 |
+-----+-----------------+------------------+

我想对 mess_stock table 的 pay_amount 的总和进行分组。我使用了以下查询

SELECT opening_balance AS ope_stock, 
       balance AS clo_stock, 
       SUM(IF(pay_type = 1, pay_amount, 0)) mess_pay,
       SUM(IF(pay_type=2, pay_amount, 0)) est_pay 
FROM mess_stock;

效果很好。 particular_name 是 add_grocery table 的自增 id。我需要向内向外的总量。例如向内金额 10 意味着它必须使用 mess_stock table 中提供的 particular_name 从 add_grocery 获得 particular_price，同样我需要所有答案.我想按日期对它进行排序。条目的日期存储在连接到 mess_stock table.

的 mess_voucher table 中

Answer 1

试试这个它会起作用：

使用内部联接：

SELECT t2.`particular_name`,t1.`inward`,t1.`outward`,t2.`particular_price`,t3.`voucher_date` from Mess_stock t1 JOIN Add_grocery t2 ON t1.`particular_name`=t2.`sno` JOIN Mess_voucher t3 ON t3.`voucher_id`=t1.`voucher_id` ORDER BY t3.`voucher_date` DESC

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