PostgreSQL 7.4.3 Documentation | ||||
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To change data (perform an INSERT,
UPDATE, or DELETE) you use
the executeUpdate()
method. This method is
similar to the method executeQuery()
used to
issue a SELECT statement, but it doesn't return
a ResultSet
; instead it returns the number
of rows affected by the INSERT,
UPDATE, or DELETE statement.
Example 31-3 illustrates the usage.
Example 31-3. Deleting Rows in JDBC
This example will issue a simple DELETE statement and print out the number of rows deleted.
int foovalue = 500; PreparedStatement st = db.prepareStatement("DELETE FROM mytable WHERE columnfoo = ?"); st.setInt(1, foovalue); int rowsDeleted = st.executeUpdate(); System.out.println(rowsDeleted + " rows deleted"); st.close();