Sql query with bind variables execution in Jdbc

Question

I have a sql query like this.

 select \"DEPT\".\"DEPTNO\" as \"DEPTNO1\",
\"DEPT\".\"DNAME\" as \"DNAME1\",
\"DEPT\".\"LOC\" as \"LOC1\",
\"EMP\".\"COMM\" as         


        

Answer 1

replace :deptno in your query with a ?.

and instead of instantiating statement use the following:

PreparedStatement stmt=con.prepareStatement(query);

stmt.setInt(1,deptno); //1 is for the first question mark

where deptno holds the value for which you want to execute the query.

Through PrepredStatement interface we can use parametrized query which is compiled only once and has performance advantage in comparison to the Statement interface.