Read data from sql compute clause in .NET

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How can I get computed values in .NET from a sql statement like this:

SQL

select name, earning from customer
compute min(earning), max(earning)

If I execute this insinde management studio, I get the rows from customer and a secound set with the min and max values.

But with a DataReader in .NET, I can get only a table with rows from customer.

Update:
I think, there are 2 result sets from one query. But I don't know how to access to the second.

Posted 24-Oct-12 23:47pm

BlackMilan

Updated 25-Oct-12 0:48am

v2

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StianSandberg 25-Oct-12 5:55am

FYI: This feature will be removed in the next version of Microsoft SQL Server. Do not use this feature in new development work, and modify applications that currently use this feature as soon as possible. Use ROLLUP instead. For more information, see GROUP BY (Transact-SQL).

Sushil Mate 25-Oct-12 6:00am

Because they are two sql query not one.

BlackMilan 25-Oct-12 6:41am

No, I think it's one query (from reading doc), but 2 result sets.

Sushil Mate 25-Oct-12 6:43am

2 result sets means 2 queries. you need to club it together.

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Storxstar · Answer 1 · 2012-10-25T00:01:00

If you had just the computed values from sql.

C#

using (SqlConnection conn = new SqlConnection(@"YourDatabaseInfo"))
      {
        conn.Open();
        SqlDataReader myReader = null;
        SqlCommand cmd = new SqlCommand("select name, earning from customer compute min(earning) as [MinEarned], max(earning) as [MaxEarned]", conn);
        myReader = cmd.ExecuteReader();
        while (myReader.Read())
        {
int MinEarned = Convert.ToInt32(myReader["MinEarned"]);
int ManEarned= Convert.ToInt32(myReader["MaxEarned"]);
        }
mtReader.close();
conn.close();
      }

Aswathi Narayan · Answer 2 · 2012-10-25T00:06:00

Solution 2

Hi

I think this query will help you..

SQL

select name, earning,(select min(earning) from customer) as MinEarning,

(select max(earning) from customer) as MaxEarning from customer   where earning in
( (select min(earning) from customer) ,

(select max(earning) from customer))

Aswathi Narayan

Posted 25-Oct-12 0:06am

Aswathi Narayan

Updated 25-Oct-12 0:07am

v3

Comments

BlackMilan 25-Oct-12 6:46am

I can't verify this from now, but as described above I think, there are 2 result sets from one query.