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    <p>If it is an auto generated key, then you can use <a href="http://docs.oracle.com/javase/7/docs/api/java/sql/Statement.html#getGeneratedKeys%28%29" rel="noreferrer"><code>Statement#getGeneratedKeys()</code></a> for this. You need to call it on the same <code>Statement</code> as the one being used for the <code>INSERT</code>. You first <strong>need</strong> to create the statement using <a href="http://docs.oracle.com/javase/7/docs/api/java/sql/Statement.html#RETURN_GENERATED_KEYS" rel="noreferrer"><code>Statement.RETURN_GENERATED_KEYS</code></a> to notify the JDBC driver to return the keys. </p> <p>Here's a basic example:</p> <pre><code>public void create(User user) throws SQLException { try ( Connection connection = dataSource.getConnection(); PreparedStatement statement = connection.prepareStatement(SQL_INSERT, Statement.RETURN_GENERATED_KEYS); ) { statement.setString(1, user.getName()); statement.setString(2, user.getPassword()); statement.setString(3, user.getEmail()); // ... int affectedRows = statement.executeUpdate(); if (affectedRows == 0) { throw new SQLException("Creating user failed, no rows affected."); } try (ResultSet generatedKeys = statement.getGeneratedKeys()) { if (generatedKeys.next()) { user.setId(generatedKeys.getLong(1)); } else { throw new SQLException("Creating user failed, no ID obtained."); } } } } </code></pre> <p>Note that you're dependent on the JDBC driver as to whether it works. Currently, most of the last versions will work, but if I am correct, Oracle JDBC driver is still somewhat troublesome with this. MySQL and DB2 already supported it for ages. PostgreSQL started to support it not long ago. I can't comment about MSSQL as I've never used it.</p> <p>For Oracle, you can invoke a <code>CallableStatement</code> with a <code>RETURNING</code> clause or a <code>SELECT CURRVAL(sequencename)</code> (or whatever DB-specific syntax to do so) directly after the <code>INSERT</code> in the same transaction to obtain the last generated key. See also <a href="https://stackoverflow.com/questions/3552260/plsql-jdbc-how-to-get-last-row-id/3552353#3552353">this answer</a>.</p>
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    1. POHow to get the insert ID in JDBC?
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    1. COIt's better to get the next value in a sequence before the insert than to get the currval after the insert, because the latter might return the wrong value in a multi-threaded environment (e.g., any web app container). The JTDS MSSQL driver supports getGeneratedKeys.
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    2. CO(should clarify that I usually use Oracle, so have very low expectations of a JDBC driver's capabilities normally).
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    3. CO@JeeBee: as far as I know this doesn't apply if you're using the *same* statement (inside the same transaction). IIRC Hibernate also works that way.
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