how to rows of values in asp.net

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hi friends ia have some rows ..student fee column

i wan to calculate by using student id how much fee was payed to school so please write a query for result for addition of rows values..

like student id =1 , his payed 3 time ,1000,500,3000..iwat to display total amount =4500 in asp.net so please help ..
thank you ,..

Posted 1-Jan-16 22:02pm

Member 10575434

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koolprasad2003 · Answer 1 · 2016-01-01T22:18:00

Solution 1

You can use SUM function, returns the total sum of a numeric column. see below query snippet

SQL

SELECT SUM(fee) AS FeesPaid FROM table1 where student id =1

Hope it helps

Posted 1-Jan-16 22:18pm

koolprasad2003

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Member 10575434 2-Jan-16 4:29am

i am write like this but it is not working
sqlcon.Open();
SqlCommand cmdac = new SqlCommand("select SUM[disamount] from tbl_sjodata where svid=@visionid", sqlcon);
cmdac.Parameters.AddWithValue("@visionid",lbl_visionid.Text);
int ac = Convert.ToInt32(cmdac.ExecuteScalar());
lbl_availablecreditamount.Text = Convert.ToString(ac);
sqlcon.Close();

koolprasad2003 2-Jan-16 4:48am

First just try to run plain query in SQL Query Analyzer and see if it produce output and then try for the code, let me know if it really works