How to get max id from shift_details (table) in SQL server in WPF C#

Question

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SQL

Select closing_date,employee_id from shift_details group by MAX(sd_id)

What I have tried:

SQL

SELECT MAX(sd_id) AS sd_id FROM shift_details

Posted 20-Oct-22 3:48am

prashanth manoj

Updated 24-Oct-22 1:30am

PIEBALDconsult

v2

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Richard Deeming 20-Oct-22 10:23am

You've forgotten to ask a question. We have no idea which part you're stuck with: writing the SQL query to get the max ID; executing that query from C#; triggering the C# code from some sort of WPF event; or something else entirely.

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CHill60 · Accepted Answer · 2022-10-24T01:30:00

Based on the SQL you have posted it looks as if you are trying to get closing_date and employee_id from shift details for the row containing the maximum sd_id.

There are many ways you can achieve this

1. Declare a variable, assign the max sd_id value to it and select from the table for that id e.g.

SQL

declare @maxid int = (SELECT MAX(sd_id) AS sd_id FROM shift_details);
Select closing_date,employee_id from shift_details 
where sd_id = @maxid;

2. Use a sub-query to get that value and filter the results on that sub-query e.g.

SQL

Select closing_date,employee_id from shift_details 
where sd_id = (SELECT MAX(sd_id) from shift_details);

3. Do an inner join on a sub-query e.g.

SQL

Select closing_date,employee_id from shift_details a
inner join (SELECT MAX(sd_id) as maxid from shift_details) b on a.sd_id = b.maxid;

4. Use a combination of ORDER BY and TOP (N.B. This is not a recommended approach, look at the execution plans if you want to see why. I'm only including it here for illustrative purposes.) e.g.

SQL

Select top 1 closing_date,employee_id from shift_details order by sd_id desc;

If this is not what you were trying to do then update your question with more information, and reply to this post and I will try to help you