If generated keys are requested on a table that has no auto increment column, the JDBC driver will return a null result set. When you insert rows by executeUpdate or execute an INSERT statement or an INSERT within SELECT statement, you need to indicate that you will want to. Returning generated keys in MySql with JDBC PreparedStatement duplicate This question already has an answer here: I'm programming with plain JDBC a DAO layer because I only have 61.38 MB on Java Memory in my Tomcat (service hosting).

1. Mysql Insert Return Id
2. Mysql Insert Statement
3. Mysql Insert Statement Return Generated Keys In Java
4. Mysql Insert Statement Return Generated Keys 2016

6.4 Retrieving AUTO_INCREMENT Column Values through JDBC

Before version 3.0 of the JDBC API, there was no standard way of retrieving key values from databases that supported auto increment or identity columns. With older JDBC drivers for MySQL, you could always use a MySQL-specific method on the Statement interface, or issue the query SELECT LAST_INSERT_ID() after issuing an INSERT to a table that had an AUTO_INCREMENT key. Using the MySQL-specific method call isn't portable, and issuing a SELECT to get the AUTO_INCREMENT key's value requires another round-trip to the database, which isn't as efficient as possible. The following code snippets demonstrate the three different ways to retrieve AUTO_INCREMENT values. First, we demonstrate the use of the new JDBC 3.0 method getGeneratedKeys() which is now the preferred method to use if you need to retrieve AUTO_INCREMENT keys and have access to JDBC 3.0. The second example shows how you can retrieve the same value using a standard SELECT LAST_INSERT_ID() query. The final example shows how updatable result sets can retrieve the AUTO_INCREMENT value when using the insertRow() method.

Example 6.8 Connector/J: Retrieving AUTO_INCREMENT column values using Statement.getGeneratedKeys()

Example 6.9 Connector/J: Retrieving AUTO_INCREMENT column values using SELECT LAST_INSERT_ID()

Example 6.10 Connector/J: Retrieving AUTO_INCREMENT column values in Updatable ResultSets

Running the preceding example code should produce the following output:

At times, it can be tricky to use the SELECT LAST_INSERT_ID() query, as that function's value is scoped to a connection. So, if some other query happens on the same connection, the value is overwritten. On the other hand, the getGeneratedKeys() method is scoped by the Statement instance, so it can be used even if other queries happen on the same connection, but not on the same Statement instance.

In this tutorial, you will learn how to use PreparedStatement object to insert data into MySQL table.

Mysql Insert Return Id

In the previous tutorial, we have shown you how to use the PreparedStatement object to update data. When you call the executeUpdate() method, you get the number of rows affected. When you insert a record into a table, you may want to get the inserted ID back to the program for further processing. Let’s see how we can do it.

First, as always, you open a new connection to MySQL. You can utilized the utility class MySQLJDBCUtil that we developed in the previous tutorial.

Then, you construct an INSERT statement with placeholders and create a new PreparedStatement object by calling the prepareStatement() method of the Connection object. You pass the INSERT statement as the first argument and an integer with value Statement.RETURN_GENERATED_KEYS as the the second argument to the method. The second argument instructs JDBC to give the inserted ID back.

Next, you supply values for placeholders by calling setYYY() method of the PreparedStatement object.

Mysql Insert Statement

After that, you call the executeUpdate() method to execute the INSERT statement. This method returns the number of rows affected. We check the return value to see if the record has been inserted successfully.

Finally, to get the inserted id, you call the getGeneratedKeys() method of the PreparedStatement object. The method returns a ResultSet . You just need to get data out of this ResultSet as follows:

Mysql Insert Statement Return Generated Keys In Java

The following is the complete example of inserting data into the candidates table and get the inserted ID back.

Let’s run the program.

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Mysql Insert Statement Return Generated Keys 2016

It shows that you have successfully inserted a new candidate into the candidates table with id 134.

In this tutorial, we have shown you how to use PreparedStatement object to insert a new record into a MySQL table and get the inserted ID back for further processing.