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SqlCommand com = new SqlCommand("select * from myuser where username=@UserName and password=@Pwd", con);
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com.Parameters.Add( new SqlParameter("@Pwd",Pwd));
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create PROCEDURE pagelist
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select distinct(employeeid) from orders
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select orders.EmployeeID,Employees.EmployeeID
from orders INNER JOIN Employees
on Employees.EmployeeID=orders.EmployeeID
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