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JPQL is used to make queries against entities stored in a relational database. It is heavily inspired by SQL, and its queries resemble SQL queries in syntax, [1]: 17, §1.3 but operate against JPA entity objects rather than directly with database tables. [1]: 26, §2.2.3
iBATIS 2.0 was released in June 2004. [5] It was a complete redesign while keeping the same features. Clinton donated the iBATIS name and code to Apache Software Foundation and the project stayed in the ASF for six years. Eventually iBATIS DAO was deprecated, considering that better DAO frameworks were available, such as Spring Framework.
Major DBMSs, including SQLite, [5] MySQL, [6] Oracle, [7] IBM Db2, [8] Microsoft SQL Server [9] and PostgreSQL [10] support prepared statements. Prepared statements are normally executed through a non-SQL binary protocol for efficiency and protection from SQL injection, but with some DBMSs such as MySQL prepared statements are also available using a SQL syntax for debugging purposes.
The Spring 1.2.6 framework won a Jolt productivity award and a JAX Innovation Award in 2006. [7] [8] Spring 2.0 was released in October 2006, Spring 2.5 in November 2007, Spring 3.0 in December 2009, Spring 3.1 in December 2011, and Spring 3.2.5 in November 2013. [9] Spring Framework 4.0 was released in December 2013. [10]
SQL Developer Data Modeler operates with and models metadata. [7] Prior to SQL Developer version 3, it constituted a separate (but integrated) free [8] counterpart of SQL Developer. As of SQL Developer version 3 modeling became an integrated part of the overall tool. "Data Modeler" can produce (among other outputs) .dmd files. [9] Data Miner [10]
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An entity–attribute–value model (EAV) is a data model optimized for the space-efficient storage of sparse—or ad-hoc—property or data values, intended for situations where runtime usage patterns are arbitrary, subject to user variation, or otherwise unforeseeable using a fixed design.
32-bit kernel 2.6.x systems with option CONFIG_LBD and all 64-bit kernel 2.6.x systems have an 8 ZB limit for all file systems. [5] Android: Android is based on Linux, which determines its base limits. Internal storage: Android 2.3 and later uses the ext4 file system. [6] Android 2.2 and earlier uses the YAFFS2 file system. External storage slots: