Sql query error while using top command

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Here I use Mysql with Asp.Net to find top 5 students.But I get the following error

SQL

conn1.Open();
                conn2.Open();
                string sql1 = "select TOP 5 `btechstudent_details`.Regd_no,Sname,Btech,Branch FROM btechstudent_details,btechstudent_academics WHERE `btechstudent_details`.Regd_no=`btechstudent_academics`.Regd_no ORDER BY Btech DESC;";
                MySqlCommand com1 = new MySqlCommand(sql1, conn1);
                MySqlDataAdapter da1 = new MySqlDataAdapter(com1);
                DataSet ds = new DataSet();
                da1.Fill(ds, "Regd_no");
                Show.DataSource = ds.Tables["Regd_no"];
                Show.DataBind();

ERROR-You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '5 `btechstudent_details`.Regd_no,Sname,Btech,Branch FROM btechstudent_details,bt' at line 1

Posted 16-Mar-15 2:04am

Somesh Dhal

Updated 16-Mar-15 2:07am

Deepu S Nair

v3

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2 solutions

Solution 2

onn1.Open();
conn2.Open();
string sql1 = "select TOP 5 btechstudent_details.Regd_no,Sname,Btech,Branch FROM btechstudent_details,btechstudent_academics WHERE btechstudent_details.Regd_no=btechstudent_academics.Regd_no ORDER BY Btech DESC;";
MySqlCommand com1 = new MySqlCommand(sql1, conn1);
MySqlDataAdapter da1 = new MySqlDataAdapter(com1);
DataSet ds = new DataSet();
da1.Fill(ds, "Regd_no");
Show.DataSource = ds.Tables["Regd_no"];
Show.DataBind();

Remove single quotes from SQL query.

Hope this will help.

Posted 16-Mar-15 2:16am

NishitSuthar

Comments

CHill60 16-Mar-15 8:29am

OP will still get error with TOP

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CHill60 · Accepted Answer · 2015-03-16T02:11:00

Solution 1

As far as I know MySQL does not support the TOP clause. The equivalent is LIMIT

So the equivalent of

SQL

SELECT TOP 5 * FROM YourTable

is

SQL

SELECT * FROM YourTable LIMIT 0,5

Posted 16-Mar-15 2:11am

CHill60

Comments

TheRealSteveJudge 16-Mar-15 8:18am

That's true. 5*