1. Java Prepared Statement Return Generated Keys
2. Mysql Jdbc Example
3. Java Preparedstatement Return Generated Keys

1. How to work with auto incrementing column in MySQL? What are enumerations in Java? How to retrieve values from an enum? How to handle indexes in JavaDB using JDBC program? How to drop a table from JavaDB using JDBC? How to create a table in JavaDB using JDBC? How to get the list of all drivers registered with the DriverManager using JDBC?
2. Import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.Statement; public class Main.
3. SQL Server allows only a single auto increment column per table. The ResultSet that is returned by getGeneratedKeys method will have only one column, with the returned column name of GENERATEDKEYS. If generated keys are requested on a table that has no auto increment column, the JDBC driver will return a null result set.
4. How to get primary key value (auto-generated keys) from inserted queries using JDBC? Description: When we are inserting a record into the database table and the primary key is an auto-increment or auto-generated key, then the insert query will generate it dynamically.

MySQL Connector/J 5.1 Developer Guide / JDBC Concepts / Retrieving AUTOINCREMENT Column Values through JDBC 6.4 Retrieving AUTOINCREMENT 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.

In this tutorial, you will learn how to use commit() and rollback() methods of the Connection object to control transaction. Facebook generating a release key hash download.

Setting auto-commit mode

When you connect to MySQL databases, the auto-commit mode is set to true by default. It means that the changes will be applied to the database once the statement successfully executed. In case you want to control when to commit the transaction, you call the setAutoCommit() method of the Connection object as follows:

Once you have set auto-commit mode to false , you can call commit() or rollback() methods of the Connection object to commit or rollback the transaction.

Notice that you should always call setAutoCommit() method right after you open a connection to the database.

Committing and rolling back a transaction

Once the auto-commit mode is set to false , you can commit or rollback the transaction. The flow of using those methods is as follows:

MySQL JDBC transaction example

In this example, we will insert a new record into the candidates table and also assign some of skills to the newly inserted candidate.

We will perform both inserting a candidate and assigning skills within one transaction. The steps will be as follows:

1. Insert a record into the candidates table and get the inserted ID back.
2. Insert a set of candidate ID and Skill ID into the candidate_skills table.
3. If all above operations are successfully, commit the transaction, otherwise roll it back.

Java Prepared Statement Return Generated Keys

The following is the complete example of using JDBC transaction.

Let’s check the table candidates table before we run the program.

Now, we run the program.

and check the candidates table again:

Mysql Jdbc Example

and check also the candidate_skills table to see if the assignments are there.

Java Preparedstatement Return Generated Keys

As you see we have successfully inserted data into both candidates and candidate_skills table within the same transaction.