Question

我有3个表名为productSaleStatus，productSalesVolume，productInfo

productSaleStatus表结构是

+-------------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------------+-------------+------+-----+---------+-------+ | productCode | int(11) | YES | | NULL | | | productName | varchar(10) | YES | | NULL | | +-------------+-------------+------+-----+---------+-------+

productSalesVolume表结构是

+-------------+-------+------+-------+------+-----------+--------------+ | productCode | sales | year | month | day | aFewWeeks | dayOfTheWeek | +-------------+-------+------+-------+------+-----------+--------------+ | 1 | 100 | 2016 | 9 | 30 | 2 | 1 | | 2 | 200 | 2016 | 10 | 30 | 2 | 1 | | 1 | 150 | 2017 | 1 | 1 | 2 | 1 | | 2 | 125 | 2017 | 1 | 2 | 2 | 1 | +-------------+-------+------+-------+------+-----------+--------------+

productInfo表结构是

+-------------+------------------+-------------+ | productCode | optimumInventory | productDate | +-------------+------------------+-------------+ | 1 | 500 | 2016-10-10 | | 2 | 1000 | 2016-10-08 | | 1 | 1500 | 2016-10-20 | | 2 | 2000 | 2017-01-01 | +-------------+------------------+-------------+

productSaleStatus的示例数据是

+-------------+-------------+ | productCode | productName | +-------------+-------------+ | 1 | test | | 2 | hello | +-------------+-------------+

productSalesVolume的示例数据是

1, test, 150, 2017, 1, 1, 1500, 2016-10-20 2, hello, 125, 2017, 1, 2, 2000, 2017-01-01

productInfo的示例数据是

it "2" do skip puts "in A-2" end

所以我想要的结果是

it "2", skip: true do puts "in A-2" end

有人可以给我写样本查询吗？

Answer 1

根据您提供的示例数据，这应该会产生您想要的结果。虽然我认为您可能需要使用完整数据集添加group by和总和sales

SELECT pi.ProductName, pss.sales, pss.month, pss.day, psv.optimumInventory, psv.productDate
FROM productSaleStatus pss
      INNER JOIN productInfo pi
         ON pss.productCode = pi.productCode
      INNER JOIN productSalesVolume psv
         ON pss.productCode = psv.productCode
WHERE pss.year = '2017'

sqlite连接查询示例

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