An enterprise bean is a Java™ component that can be combined with other resources to create Java EE applications. This topic describes assembling Enterprise JavaBeans™ (EJB) modules based on the EJB 2.x and earlier specifications.
After assembling an Enterprise JavaBeans (EJB) module that contains container-managed persistence (CMP) beans, you can prevent certain types of database-related exceptions from occurring during application run time. Using sequence grouping, you can specify the order in which entity beans update relational database tables.
By designating container managed persistence (CMP) sequence groups for entity beans, you can prevent certain types of database-related exceptions during the run time of your Enterprise JavaBeans (EJB) application. Specify in each group the order in which the beans update your relational database tables.