简单的T-sql查询

Question

从上面的示例数据中，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，则返回ExpenseAmount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

不确定这是否与您完全相同，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]