Question

我有一张如下表格

        RefNo | Amount | ID |  Billed      

        1       20      1      1
        1       20      2      1

        2       10      3      0                    
        2       10      4      0 
        2       10      5      0

        3       30      6      1                          
        3       30      7      0
        3       30      8      1
        3       30      9      0

我想要像下面的那样

        RefNo | Amount | ID |  Billed  | Status    

        1       20      1      1        SingleBilled
        1       20      2      1        SingleBilled

        2       10      3      0        SingleUnBilled            
        2       10      4      0        SingleUnBilled
        2       10      5      0        SingleUnBilled

        3       30      6      1        MultipleBilled                  
        3       30      7      0        MultipleBilled
        3       30      8      1        MultipleBilled
        3       30      9      0        MultipleBilled

此处状态需要基于refNo，Billed Flag 请帮帮我

Answer 1

根据您目前为止提供的信息，这些内容有所帮助......请参阅小提琴：http://sqlfiddle.com/#!3/156c1/8

SELECT a.RefNo, a.Amount, a.ID, a.Billed, 
CASE 
  WHEN b.Bill_Total = 0 THEN 'SingleUnBilled' 
  WHEN b.Bill_Count > b.Bill_Total THEN 'MultipleBilled' 
  WHEN b.Bill_Count = b.Bill_Total THEN 'SingleBilled'
  ELSE ''
END AS [Status]
FROM test a
INNER JOIN
(
  SELECT RefNo, 
  COUNT(Billed) AS Bill_Count, 
  SUM(CAST(Billed AS INT)) AS Bill_Total 
  FROM test
  GROUP BY RefNo
) b
ON a.RefNo = b.RefNo

基于给定规则重复行状态

1 个答案: