mysql需要从一个表中获取数据,其中id与另一表中的列值相同。但是必须从另一个表中仅获取列值,其ID与其他两个表中的列值相同(IN
)。
表如下:
带有列的表名sales_invoices
(在下面我没有显示所有列,有一些列是问题所必需的)。
IdInvoices
| Date
带有列的表名purchase_invoices
IdInvoicesP
| Date
带有列的表名items
IdI
| IdGoodsServices
| IdInvoices
带有列的表名goods_services
IdGs
(唯一值)
这是表格之间的链接
IdGs
= IdGoodsServices
IdInvoices
(items
)= IdInvoices
(sales_invoices
)= IdInvoicesP
尝试了多种代码变体。在所有情况下,都会出错。下面是最后使用的代码。
SELECT count(DISTINCT `IdGs`) FROM `goods_services` WHERE `IdGs` IN
( SELECT `IdGoodsServices` FROM `items` WHERE `IdInvoices` IN
( SELECT `IdInvoices`, `IdInvoicesP` FROM
`sales_invoices`, `purchase_invoices` WHERE `Date` <= ? )
)
要计算在特定日期之前发出(书写)的销售和购买发票中包含的IdGs
(产品或商品/服务代码)。
goods_services
和sales_invoices
/ purchase_invoices
之间没有直接链接。表items
链接到goods_services
和(sales_invoices
/ purchase_invoices
)
上面的代码出现错误
SQLSTATE[23000]: Integrity constraint violation: 1052 Column 'Date' in where clause is ambiguous
尝试过的子-子只能从一张表中选择,得到一些结果且没有错误。
这是查询
SELECT count(DISTINCT `IdGs`) FROM `goods_services` WHERE `IdGs` IN
( SELECT `IdGoodsServices` FROM `30u2s5r_items` WHERE `IdInvoices` IN
( SELECT `IdInvoicesP` FROM
`30u2s5r_purchase_invoices` WHERE `Date` <= ? )
)
下面是工作代码(根据我到目前为止的测试)。
SELECT count(DISTINCT `IdGs`) FROM `goods_services` WHERE `IdGs` IN
(SELECT `IdGoodsServices` FROM `items` WHERE
`IdInvoices` IN
(SELECT DISTINCT `IdInvoices` FROM `sales_invoices`
WHERE `sales_invoices`.`Date` <= ? )
OR
`IdInvoices` IN
( SELECT DISTINCT `IdInvoicesP` FROM `purchase_invoices`
WHERE `purchase_invoices`.`Date` <= ? )
)
答案 0 :(得分:1)
使用Purchase_invoices.Date或sales_invoices.Date