Question

我有这个问题：

select  item_code, item_name, First, Second, Third, `Fourth` from (
            (SELECT t.item_code, i.item_name, t.actual_qty AS `First`, '' AS `Second`, '' AS `Third`, '' AS `Fourth` FROM tabBin t JOIN `tabItem` i ON i.name = t.item_code WHERE t.warehouse = "Finished Goods")
            UNION 
            (SELECT t.item_code, i.item_name, '' AS `First`, t.actual_qty AS `Second`, '' AS `Third`, '' AS `Fourth` FROM tabBin t JOIN `tabItem` i ON i.name = t.item_code WHERE t.warehouse = "Tank 01 - 1200 KG")
            UNION 
            (SELECT t.item_code, i.item_name, '' AS `First`, '' AS `Second`, t.actual_qty AS `Third`, '' AS `Fourth` FROM tabBin t JOIN `tabItem` i ON i.name = t.item_code WHERE t.warehouse = "Tank 02 - 1200 KG")
            UNION 
            (SELECT t.item_code, i.item_name, '' AS `First`, '' AS `Second`, '' AS `Third`, t.actual_qty AS `Fourth` FROM tabBin t JOIN `tabItem` i ON i.name = t.item_code WHERE t.warehouse = "Tank 03 - 1200 KG")) as temp
            GROUP BY temp.item_code, temp.item_name, temp.First, temp.Second, temp.Third, temp.Fourth

这是输出：

item_code  item_name  first, second, third, fourth
fg-plu        PLUM                         30.000000
fg-plu        PLUM                  40.000000   
fg-plu        PLUM           10.000000      
fg-plu        PLUM   1248.00

我希望按item_code和item_name或item_code进行分组。

Answer 1

这实际上似乎是伪装的透视查询。只需将CASE与SELECT t.item_code, i.item_name, MAX(CASE WHEN t.warehouse='Finished Goods' THEN t.actual_qty END) AS first, MAX(CASE WHEN t.warehouse='Tank 01 - 1200 KG' THEN t.actual_qty END) AS second, MAX(CASE WHEN t.warehouse='Tank 02 - 1200 KG' THEN t.actual_qty END) AS third, MAX(CASE WHEN t.warehouse='Tank 03 - 1200 KG' THEN t.actual_qty END) AS fourth FROM tabBin t INNER JOIN tabItem i ON i.name = t.item_code GROUP BY t.item_code, i.item_name表达式一起使用即可获得所需的输出：

C:\Users\powershell> .\test.ps1 -flag

Answer 2

解决了

enter code Select i.item_name,IFNULL((select b.actual_qty as i2total
       from `tabItem` as i2
            join  `tabBin` as b on b.item_code = i2.item_code AND  i2.item_code = i2.item_code
       where b.warehouse = "Finished Goods" AND  i2.item_code = i.item_code),0) foa, IFNULL((select b.actual_qty as i2total
       from `tabItem` as i2
            join  `tabBin` as b on b.item_code = i2.item_code AND  i2.item_code = i2.item_code
       where b.warehouse = "Toros" AND  i2.item_code = i.item_code),0) toros, (foa + toros) AS total FROM `tabItem` as i WHERE  i.item_group = "products" GROUP BY  i.item_name, foa, toros ;

感谢大家的帮助。

与Marionadb的UNION一起分组

2 个答案: