簡單的T-SQL查詢

Question

從上述採樣數據，我想要寫的查詢將返回SalesAmount兩個爲0.0如果ExpRow值= 1，並返回ExpenseAmount爲0.0如果ExpRow值= 2

Answer 1

不知道這是否正是你在之後但是...

SELECT CASE([ExpRow]) WHEN 1 THEN 0 ELSE SalesAmount END AS 'SalesAmount', 
     CASE([ExpRow]) WHEN 2 THEN 0 ELSE ExpenseAmount END AS 'ExpenseAmount' 
FROM [YOUR_TABLE] 

Answer 2

SELECT 
    ExpRow, 
    ExpenseDate, 
    CASE WHEN ExpRow = 2 THEN 0 ELSE ExpenseAmount END AS ExpenseAmount, 
    CASE WHEN ExpRow = 1 THEN 0 ELSE SalesAmount END AS SalesAmount 
FROM 
    Table