Prepared statement with wildcard not returning certain rows but query returns all rows?

Question

I'm using JTDS as a driver to connect to SQL server.

Here's the query that's giving me problems:

SELECT EmpID,FirstName,LastName,CompanyName,DepartmentName,JobTitle,HireDate FROM Employees where UPPER(FirstName) LIKE 'KEVIN%'

It returns 2 rows on SQL Server. One that has 'KEVIN' in upper case and another that has 'Kevin' like so. I used the wildcard to make sure I get both results. In my EmployeeDAO class I'm using the following:

        ps = con.prepareStatement("SELECT EmpID,FirstName,LastName,CompanyName,"
                + "DepartmentName,JobTitle,HireDate FROM Employees WHERE UPPER(FirstName) LIKE ?");
        ps.setString(1, FirstName + "%");
        rs = ps.executeQuery();

And then of course I put KEVIN on my main. It only returns ONE row, which is the 'Kevin' row.

How do I fix this so it returns all rows?

Answer 1

Default collation of the SQL Server installation is SQL_Latin1_General_CP1_CI_AS and it is not case sensitive.

Change collation of the query:

SELECT Col1
FROM Table1
WHERE Col1 COLLATE Latin1_General_CS_AS LIKE 'KEVIN%'

Answer 2

Your query looks fine (although I would uppercase the parameter value before setting it, to make it more robust). The problem is just in the way how you're collecting the rows from the ResultSet . Likely you're plain overriding the previous row with the next row so that you end up with only one row (the last one) in your collection.