SQL 检查时间是否在一系列时间段内

Question

我想写 SQL 来检查 Table A 中的给定时间（例如 5:24 AM）是否在 [=24= 中的以下不规则时间段之一内] B.

5:00 AM to 6:00 AM

7:30 AM to 9:15 AM

1:26 PM to 2:45 PM

4:00 PM to 4:59 PM

10:00 PM to 11:14 PM

我的计划是写这个 SQL 语句：

CASE 
   WHEN [Given Time] BETWEEN [START TIME] and [END TIME] THEN 1 
   ELSE 0 
END

但后来我意识到我需要编写 5 个连接——还有其他方法吗？

萨姆

Answer 1

请试试这个：

CASE 
   WHEN EXISTS (SELECT 1 FROM [My Time Table] 
                 WHERE [Given Time] BETWEEN [START TIME] and [END TIME]) 
   THEN 1 
   ELSE 0 
END

Answer 2

我没有看到 CASE 声明或 JOIN 的单一原因。这应该足够了。

DECLARE @YourTime time = '05:42'

SELECT
   *
FROM 
   YourTable
WHERE
   @YourTime between [Start Time] and [End Time]

或者更明确地说...

...
WHERE 
   [Start Time] <= @YourTime 
   AND [End Time] >= @YourTime

SQL 检查时间是否在一系列时间段内

SQL checking if time within a series of timebands

sql-server

datetime

between