Passing parameter to a SQL query - Please help

Question

Hi All,
I am new to JDBC. I have been trying to pass an external variable to an SQL Query.
The query is
String username1="le";
PreparedStatement pstmt = null;
pstmt = c.prepareStatement("select * from users where USER_NAME like '%?%'");
     pstmt.setString(1, username1);
     pstmt.executeQuery();
     ResultSet rs = pstmt.getResultSet();
I am trying to retrieve values from the users table where the USER_NAME column value that is a String contains the supplied value username1.
I am using the question mark (?) character to pass the value from the variable username1. I am also using the '%' substitution character which matches for any number of characters. So, the above query should retrieve rows where the USER_NAME is something like "charles","leander","Elena" etc.( that contains "le")
I am getting the error:
SQLException: java.sql.SQLException: ORA-01006: bind variable does not exist
I changed the query to
PreparedStatement pstmt = null;
pstmt = c.prepareStatement("select * from users where USER_NAME like '% " + username1 + "%'");
     //pstmt.setString(1, username1);
     pstmt.executeQuery();
This time , it is not giving the error and retrieving properly.
But I want to use the original query and use the "pstmt.setString(1, username1); " . Is there any way of achieving this?
Please help.
Cheers,
charles_am

Answer 1

hi,
try this...
String username1="%le%";
pstmt = c.prepareStatement("select * from users where USER_NAME like ?")
pstmt.setString(1,username1);
cheers,
rpk