Our goal is to retrieve the name of all professors in a particular department from the Professor table given by
Professor(Id: INTEGER, Name: STRING, DeptId: DEPTS)
The department will be supplied at run time. Assume a connection object, con, has been
created.
(a) Write the JDBC statement used to create a prepared statement object pre for this query.
If the statement involves a host variable, give its value at the time the JDBC statement is
executed.
(b) Suppose we want to get the names of all professors in the CS Department using the prepared statement object pre. What JDBC statements must be executed to put these names
in a results set, res.
(c) What JDBC statement must be executed to fetch the rst name from res?
(a) Write the JDBC statement used to create a prepared statement object pre for this query.
If the statement involves a host variable, give its value at the time the JDBC statement is
executed.
Solution:
PreparedStatement pre = con.prepareStatement
( ``SELECT P.Name FROM Professor P WHERE P.DeptId = ?'')
(b) Suppose we want to get the names of all professors in the CS Department using the prepared statement object pre. What JDBC statements must be executed to put these names
in a results set, res.
Solution:
pre.setString(1, ``CS'') (or pre.setString(``DeptId'', ``CS'') )
ResultSet res = pre.executeQuery( )
(c) What JDBC statement must be executed to fetch the rst name from res?
Solution:
name = res.getString(1) (or name = res.getString(``Name'') )
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