c# - how to do inner join between two tables in sql server 2008r2 -

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i have 2 tables:

questionbank table qustion  answer1  answer2  answer3  answer4  correct_ans  sub_name  result table username  name  correctanswer totalquestions  percentage  result  sub_name

i want perform inner join between these 2 result read questionbank table , store in result table how in sql server 2008.please help.

also have code c#:

sqlcommand cmd = new sqlcommand(     @"select count(result.username) correct_ans         result              inner join questionbank on result.q_id = questionbank.q_id                     , result.user_ans = questionbank.correct_ans                     , result.username = " + username + " ");  sqlcommand cmd1 = new sqlcommand(     @"select count(q_id) totalquestions questionbank";);

what have fine (although r.username should where, not join clause); really really should parameterize, though:

using(var cmd = new sqlcommand(@" select count(r.username) correct_ans  result r inner join questionbank q on r.q_id = q.q_id , r.user_ans = q.correct_ans r.username = @username")) {     cmd.parameters.addwithvalue("username", username))     // use it; since returns single count, can use:     int correct = (int)cmd.executescalar();     //...etc }

other that: should fine. if aren't seeing matches, try query in ssms, making sure prepend like:

declare @username nvarchar(200) = 'fred';

(or whatever). when filtering on value username, immediate thought "case sensitivity" - sql server can case-sensitive or case-insensitive: configured case-sensitive, 'fred' not match 'fred' or 'fred' or 'fred'.


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