SQL Where子句基于另一个参数的条件赋值

Question

我需要生成一个报告，用户可以在单选按钮中选择所有问题，未解决问题或已解决的问题。在我看来，我有一个isClosed位列。如果我没有All Issues单选框，我就会这样做：

SELECT *
FROM MyView
WHERE isClosed = @ViewClosedRecords

但是我需要在isClosed = @ViewClosedRecords时移除@ViewAllRecords = true条件。我该怎么做？

Answer 1

SELECT *
FROM MyView
WHERE @ViewAllRecords OR isClosed = @ViewClosedRecords

善，

丹

Answer 2

select *
from MyView
WHERE isClosed = @ViewClosedRecords
OR @ViewAllRecords

当用户在单选按钮中选择“所有问题”时，将@ViewAllRecords参数设置为true。

Answer 3

WHERE
(@ViewAllRecords = false AND isClosed = @ViewClosedRecords)
OR 
(@ViewAllRecords = true)

Answer 4

以下内容将为您提供isClosed = @ViewClosedRecords的所有行。如果@ViewAllRecords = true则会返回所有行并忽略isClosed。

SELECT *
FROM MyView
WHERE isClosed = @ViewClosedRecords
   OR @ViewAllRecords = true

Answer 5

WHERE (@ViewAllRecords <> true AND isClosed = @ViewClosedRecords)