简单的T-sql查询

Question

从上面的示例数据，我想编写一个查询，如果ExpRow值= 1，则将SalesAmount返回为0.0；如果ExpRow值= 2，则将ExpenseAmount返回为0.0。

Answer 1

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

Answer 2

不知道这是否正是您想要的，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]