Question

我正在使用以下带有SQL的SUM查询

SELECT SUM(cost) as total FROM sales where passport =

如何从计算中排除某些记录，例如pay = 1？

Answer 1

你的意思是这样吗？

SELECT SUM(cost) as total FROM sales where (passport = $myPassport AND paid <> 1)

Answer 2

简单地

SELECT SUM(cost) as total 
FROM sales
WHERE passport = ?
 AND paid <> 1

您可能也在这里寻找一个小组

SELECT passport, SUM(cost) as total 
FROM sales
WHERE passport = ?
 AND paid <> 1
GROUP BY passport

Answer 3

SELECT SUM(cost) as total FROM sales where passport = "12345" and paid <> 1

Answer 4

SELECT SUM(cost) as total 
FROM sales 
WHERE passport = 12345
AND paid <> 1

Answer 5

你的意思是只得到总数等于1吗？

使用：HAVING total = 1

Answer 6

有时使用这样的IF语句很有用：

CREATE PROCEDURE [dbo].[ManipulateValues]
    -- Add the parameters for the stored procedure here
    @Parameter  float

AS
BEGIN

    DECLARE @break_var as int
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    set @break_var = 0

    IF NOT(ISNUMERIC(@Parameter)=1)
    BEGIN
    SET @Parameter = NULL
    set @break_var = 1
    END

    IF @Parameter < 0.03 AND @break_var = 0
    BEGIN
    SET @Parameter = 0.029
    set @break_var = 1
    END

    IF @Parameter > 0.03 AND @break_var = 0
    BEGIN
    SET @Parameter = 0.031
    set @break_var = 1
    END

    IF @Parameter < -0.03 AND @break_var = 0
    BEGIN
    SET @Parameter = -0.031
    set @break_var = 1
    END

    IF @Parameter = 0.12 AND @break_var = 0
    BEGIN
    SET @Parameter = 0.119
    set @break_var = 1
    END

    IF @Parameter < 1 AND @break_var = 0
    BEGIN
    SET @Parameter = 0.99
    set @break_var = 1
    END


    SELECT @Parameter

END

以这种方式，当状态字段等于1时，成本将乘以0并从SUM中排除，但不会排除计数函数的行。

另一种方法是在SUM中使用select，但它不会那么有用。

从SQL SUM查询中排除某些字段

6 个答案: