Question

我有一个case语句，可以对金额进行总计，四舍五入和加标签，但效果很好，但是数据最终以水平格式显示（每条记录有多个金额），这导致我无法在随后的语句中进行枢纽操作以垂直格式化数据（每条记录一个金额）。如果可能的话，我想在一份声明中完成。我的代码如下：

SELECT
    Field,
    ROUND(SUM(CASE
                  WHEN TYPE = 'Paid Loss'
                  THEN AMOUNT
                  ELSE 0
              END
          ), 2
    ) PAID,
    ROUND(SUM(CASE
                  WHEN TYPE = 'OS'
                  THEN AMOUNT
                  ELSE 0
              END
          ), 2
    ) OS,
    ROUND(SUM(CASE
                  WHEN TYPE <> 'Paid Exp'
                  THEN AMOUNT
                  ELSE 0
              END
          ), 2
    ) INCURRED
FROM dbo.mydatabase
GROUP BY Field;

结果是：

Field   |PAID |OS  |INCURRED
----------------------------
result1 | 1   | 20 | 10
result2 | 5   | 30 | 15

当我真正想要的是：

Field   | DATA_TYPE | AMOUNT
---------------------------
result1 | PAID      | 1
result2 | PAID      | 5
result3 | OS        | 20
result4 | OS        | 30
result5 | INCURRED  | 10
result6 | INCURRED  | 15

键将是唯一的，所以这不是问题。有人知道如何重新排列CASE，以便可以在一个语句中完成吗？谢谢！

Answer 1

这行不通吗？

SELECT Field, 'PAID' DATA_TYPE, ROUND(SUM(AMOUNT), 2) AMOUNT
FROM dbo.mydatabase
WHERE TYPE = 'Paid Loss'
GROUP BY Field

UNION ALL

SELECT Field, 'OS' DATA_TYPE, ROUND(SUM(AMOUNT), 2) AMOUNT
FROM dbo.mydatabase
WHERE TYPE = 'OS'
GROUP BY Field

UNION ALL

SELECT Field, 'INCURRED' DATA_TYPE, ROUND(SUM(AMOUNT), 2) AMOUNT
FROM dbo.mydatabase
WHERE TYPE <> 'Paid Exp'
GROUP BY Field

甚至是这样：

SELECT Field
  , (CASE
     WHEN TYPE IN ('Paid Loss', 'OS') THEN TYPE
     WHEN TYPE <> 'Paid Exp' THEN 'INCURRED'
     END) DATA_TYPE
  , ROUND(SUM(AMOUNT), 2) AMOUNT
FROM dbo.mydatabase
GROUP BY Field
  , (CASE
     WHEN TYPE IN ('Paid Loss', 'OS') THEN TYPE
     WHEN TYPE <> 'Paid Exp' THEN 'INCURRED'
     END) DATA_TYPE

具有多个字段的SSMS案例声明

1 个答案: