how to delete first rows in the table but not the last row in sqlserver 2005

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SQL-Server-2008

Hi all,

Iam working on SQLserver 2005 database using asp.net c#.

In my table i have 5 rows when i click on delete button it should delete first all rows except last row.

This table is incrementable, it will add rows.

This is my asp.net C# code.

C#

SqlConnection conDelete = new SqlConnection(_connString);
            SqlCommand cmdDelete = new SqlCommand();
            cmdDelete.Connection = conDelete;
          
            cmdDelete.CommandText = "Delete from UserTable where Id in (select top 3 Id from UserTable ORDER by Id asc)";
            using (cmdDelete)
            {
                conDelete.Open();

                cmdDelete.ExecuteNonQuery();
                conDelete.Close();

            }

Please help, thanks in advance.

Posted 12-Jan-14 19:19pm

Ranjith Reddy CSE

Updated 12-Jan-14 19:37pm

Karthik_Mahalingam

v2

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Karthik_Mahalingam · Answer 1 · 2014-01-12T19:48:00

Solution 1

This will delete all the rows except the last row.

SQL

Delete from UserTable where Id not in (select Id from UserTable ORDER by Id desc)";

Posted 12-Jan-14 19:48pm

Karthik_Mahalingam

Kim Togo · Answer 2 · 2014-01-12T22:16:00

Solution 2

If you just want to delete all rows except the last one. You can use MAX(..) function.
Write a SQL like this, deletes all rows where Id is less than max.

SQL

DELETE FROM UserTable WHERE Id < (SELECT MAX(Id) FROM UserTable)

Posted 12-Jan-14 22:16pm

Kim Togo