Question

我有这种查询，我希望按类别选择，例如区域（＆＃39; CENTRAL＆＃39;，＆＃39; EASTERN＆＃39;）为A1 和（＆＃39; NORTHERN＆＃39; SOUTHERN＆＃39;）中的地区为A2

如何在我的查询中添加它？

SELECT
  locinvaisle.Region AS Region,
  sum(sales_data.QUANTITY/1000) AS UnitMT
FROM
  sales_data
  INNER JOIN locinvaisle ON locinvaisle.Location = sales_data.LOCATION
WHERE
 sales_data.unit = 'KG'
 and
 sales_data.CUSTOMERACCOUNT not in ('CT1008','CT1009')
 group by locinvaisle.Region

Answer 1

如果您的数据库是公共数据库，例如IF，CASE，mysql，我认为您可以使用oracle或mssql：

SELECT
  CASE WHEN locinvaisle.Region = 'CENTRAL' OR locinvaisle.Region = 'EASTERN' THEN 'A1'
  CASE WHEN locinvaisle.Region = 'NORTHERN' OR locinvaisle.Region = 'SOUTHERN' THEN 'A2'
  ELSE 'Default'
  END
    AS Region,
  sum(sales_data.QUANTITY/1000) AS UnitMT
FROM
  sales_data
  INNER JOIN locinvaisle ON locinvaisle.Location = sales_data.LOCATION
WHERE
 sales_data.unit = 'KG'
 and
 sales_data.CUSTOMERACCOUNT not in ('CT1008','CT1009')
 group by Region

SQL在内连接中选择AS

1 个答案: