Unsure of syntax for SQL SELECT statement, please help

Question

I am trying to execute the following SQL statement:
ResultSet rs = stB.executeQuery("SELECT quantity FROM stocklevels WHERE code=salesCode[x]");where SalesCode is an integer array and x is a counter used to loop this part of the code. I keep getting the "syntax error - missing operator" message when I run the code and get to this line, can anybody please tell me the correct syntax/form to use? Many thanks.

Answer 1

Is salesCode an array in Java or in your DB? I don't know anything about SQL arrays, so I'll assume it's in your Java code.
You want to put the value of salesCode[x] into the query--say 123456. But what you've got is like doing System.out.println("The code = salesCode[x]"); and then wondering why you're seeing "salesCode[x]" instead of "123456. You'd need to do System.out.println("The code = " + salesCode[x]); Similarly, you could take the "salesCode[x]" out of the string literal that's forming the query, in order to have it evaluated as an int and stuffed into the string as "123456". It would be better to use a PreparedStatement though: ps = con.prepareStatement("select .... where code = ?");
ps.setInt(1, salsedCode[x]);
rs = ps.executeQuery();