Question

I use jsp and sql and I want to query a table using a variable that I have already declared (entity)
here is my query:

..
String **entite**="informatique";
entite="informatique"

...
rs = st.executeQuery ("select * from User where User.id_e= &**entite** ");

entite is a variable

my question is: how to use a variable in a where clause

Answer 1

My prefered solution – Use a PreparedStatement with ? and setString(...) for parameters.

See further details here:

http://download.oracle.com/javase/tutorial/jdbc/basics/prepared.html