從t-sql中只返回列中的數字值

Question

我得到了比較兩條記錄的要求： 我的表是這樣的;

EmpNo payband    ContractType 
123 band 4    permanent 
124 band 4    contract 
125 band 3    permanent 
125 band 4    permanent 
125 band 5 reviewbody permanent 

現在我想過濾重複記錄，我的第一個條件是ContractType ='永久'，然後通過高頻過濾。在上表中，EmpNo 125是一名員工，並且我想用高薪酬篩選他的記錄。得到了在payband column

些亂七八糟我想輸出，如：

EmpNo payband ContractType 
123 band 4 permanent 
125 band 5 permanent 

任何幫助嗎？感謝

Answer 1

我已經添加了邏輯，如果沒有數值，那麼任何第一支樂隊會在輸出：

DECLARE @t TABLE 
    (
     EmpNo INT , 
     payband NVARCHAR(MAX) , 
     ContractType NVARCHAR(MAX) 
    ) 

INSERT INTO @t 
VALUES (123, 'band 4', 'permanent'), 
     (124, 'band 4', 'contract'), 
     (125, 'band 3', 'permanent'), 
     (125, 'band 4 review body', 'permanent'), 
     (128, 'band', 'permanent'); 

WITH cte1 
      AS (SELECT EmpNo , 
         payband , 
         ContractType , 
         PATINDEX('%[0-9]%', payband) AS pi , 
         CHARINDEX(' ', payband, PATINDEX('%[0-9]%', payband)) AS ci 
       FROM  @t 
       WHERE ContractType = 'permanent' 
      ), 
     cte2 
      AS (SELECT * , 
         ROW_NUMBER() OVER (PARTITION BY EmpNo ORDER BY CASE 
                   WHEN pi > 0 
                   THEN CAST(SUBSTRING(payband, 
                   pi, ABS(pi - ci)) AS INT) 
                   ELSE 0 
                   END DESC) AS rn 
       FROM  cte1 
      ) 
    SELECT EmpNo , 
      payband , 
      ContractType 
    FROM cte2 
    WHERE rn = 1 

輸出：

EmpNo payband    ContractType 
123  band 4    permanent 
125  band 4 review body permanent 
128  band    permanent