How to count number of records present in a date range between a fixed time in SQL Server? - sql

Question

I need to get the number of records present in my [RecordsTable] for the last 3 months.
However the catch is I need the records which are processed between 10PM and 2AM.
For example --
07/01/2015 10PM -- 07/02/2015 2AM
07/02/2015 10PM -- 07/03/2015 2AM
07/03/2015 10PM -- 07/04/2015 2AM
The below SQL gives me the records present on any particular day starting from May,2015.
But I am not able to get the timing(10PM-2AM of next day) embedded in the SQL and need some help.
SELECT CONVERT(VARCHAR(12), RecordDate, 101),count(RecordID)
FROM [RecordsTable](NOLOCK)
WHERE RecordDate > '2015-05-01'
GROUP BY CONVERT(VARCHAR(12), RecordDate, 101)

Answer 1

MSSQL Supports both Date and Time datatypes. You can break up your where statement to reflect both date and time conditions separately.
SELECT COUNT(Records)
FROM TABLE
WHERE CONVERT(Date,DateCol) BETWEEN 'MM/DD/YYYY' AND 'MM/DD/YYYY'
AND CONVERT(Time,DateCol) BETWEEN 'HH:MM:SS' AND 'HH:MM:SS'

Answer 2

Try the following:
SELECT count(1)
FROM RecordsTable
WHERE RecordDate > '2015-05-01'
AND NOT DATEPART(hour, RecordDate) BETWEEN 2 AND 21
I assume RecordDate is a datetime or datetime2 column. between 2 and 21 will return rows where the hour for RecordDate is between 2am and 9pm, inclusive. NOT between 2 and 21 will return the reverse, giving you data for 10pm, 11pm, 12pm, and 1am. This does not include any time between 2:00am and 2:59am. If you need to include events that occurred precisely at but not after 2:00am, things get a bit tricker, but similar code based on not between would apply.

Answer 3

To get records in the last 3 months you can use two ways -- one by month looks like this
WHERE MONTH(colname) >= MONTH(GETDATE()) -3
This will get you inclusive months but not partial months. To get partial months is a bit more tricky because you could mean (for example for today) the 9th day of 3 months ago or you could mean 90 days ago. In the first case this works
WHERE colname >= dateadd(month,-3, getdate())
and for 90 days ago
WHERE colname >= dateadd(day,-90, getdate())
To get between 10PM and 2AM use this
WHERE datepart(hour,colname) >= 22 OR datepart(hour,colname) <= 2

Answer 4

Use DATEPART
SELECT COUNT(1)
FROM Table1
WHERE RecordDate > '2015-05-01'
AND (DATEPART(HOUR, RecordDate) <= 2 OR DATEPART(HOUR, RecordDate) >= 22)

Answer 5

Try this
SELECT count(*) FROM tablename where created_at>='2015-03-17 07:15:10' and created_at<='2015-07-09 02:23:50';
You can even use between
SELECT count(*) FROM tablename where created_at between '2015-03-17 07:15:10' and '2015-07-09 02:26:50';
You can use curdate() to get today's date