A method and system are provided for storing multiple instances of a CMP bean enrolled in a transaction by utilizing CMP batch operations to update multiple entries in a database table in one SQL statement only, thus avoiding multiple database roundtrips. The batch operation of CMP beans can be enabled by specifying certain options in a DTD file. As part of the batch operation feature, another option may be added to the DTD file as well, enabling the container to delay all database operations in a transaction until the commit time, automatically sort the database dependency between the operations, and send these operations to the database in a way to avoid any potential database constraint violations.