sql - 具有大于和小于的复杂 SQL where 子句

Question

@fromValue FLOAT; @toValue FLOAT;
SELECT *
 FROM INVOICE
 WHERE TOTAL > @fromValue and TOTAL < @toValue

我有一个包含 TOTAL 列的 INVOICE 表。我想在这样的组合框中选择 3 个条件：

• 总计 < 100 --> (@fromValue = 0 ; @toValue = 100)
• 100 < 总计 < 200 --> (@fromValue = 100 ; @toValue = 200)
• 总计 > 500 --> (@fromValue =500;@toValue ???)

Answer 1

您可以传递如下变量：

DECLARE @fromValue DECIMAL(18,4), @toValue DECIMAL(18,4);

SET @fromValue = 500 ; -- depending on initial value
--SET @toValue = NULL;

SELECT *
FROM INVOICE
WHERE TOTAL BETWEEN ISNULL(@fromVALUE,0) AND ISNULL(@toValue,9999999);

Answer 2

我无法想象或理解您究竟需要什么，但是如果您想传递两（2）个值并使用它，那么：

SELECT *
FROM INVOICE
WHERE TOTAL BETWEEN @fromValue AND @toValue;

Answer 3

我一定错过了什么，因为它看起来太简单了？

SELECT 
    *
FROM
    Invoice
WHERE
    Total < 100 OR Total Between 100 and 200 OR Total > 500