66 | Does JPA have any configuration to create DDL's that are database specific that are database specific. miteshpoo Mitesh Poojari Maybe what you are looking for is the Table annotation |
66 | @SequenceGenerator and single id in whole database private long id; As I understand default strategy is Auto, which causes global ID's per database |
64 | How to check if an entity exists in a Database without loading it?How to check if an entity exists in a Database without loading it? |
64 | How do I Remove an entity from the Database ?How do I Remove an entity from the Database ? |
64 | Handling a case of searching an empty databaseHandling a case of searching an empty database |
64 | Source control of databaseSource control of database |
13 | JPA Entity Fields that do not participate in persistence and their values are never stored in the database (similar ... only transient (non persistent) entity fields with no real content to be stored in the database. Persistent ... otherwise (e.g. by using the @Transient annotation). Storing an entity object in the database does not |
13 | FROM clause (JPQL / Criteria API) the database. A query identification variable is similar to a variable of a Java enhanced for loop in ... identification variables that iterate over all the database objects of a specific entity class ... over all the Country objects in the database: SELECT c FROM Country AS c The AS keyword is optional |
13 | DELETE Queries in JPA/JPQLAs explained in chapter 2, entity objects can be deleted from the database by: Retrieving ... . Applying changes to the database by calling the commit method. JPQL DELETE queries provide ... the database, DELETE queries do not retrieve data from the database, but when executed, delete specified |
2 | Step 3: Add a Main Class the database: Right click the tutorial package in the [Package Explorer] window and select New > Class ... void main(String[] args) { // Open a database connection // (create a new database ... .createEntityManager(); // Store 1000 Point objects in the database: em.getTransaction().begin |
