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This is a comparison between notable database engines for the MySQL database management system (DBMS). A database engine (or "storage engine") is the underlying software component that a DBMS uses to create, read, update and delete (CRUD) data from a database.
Version 1.9 adds serializable isolation and version 2.0 will be fully ACID compliant. Note (2): MariaDB and MySQL provide ACID compliance through the default InnoDB storage engine. [71] [72] Note (3): "For other than InnoDB storage engines, MySQL Server parses and ignores the FOREIGN KEY and REFERENCES syntax in CREATE TABLE statements.
MariaDB (MySQL fork) – when used with XtraDB, an InnoDB fork and that is included in MariaDB sources and binaries [14] or PBXT [15] [16] MarkLogic Server – a bit of this is described in [17] MemSQL; Microsoft SQL Server – when using READ_COMMITTED_SNAPSHOT, starting with SQL Server 2005 [18] MonetDB [19]
MariaDB version numbers follow MySQL's numbering scheme up to version 5.5. Thus, MariaDB 5.5 offers all of the MySQL 5.5 features. There exists a gap in MySQL versions between 5.1 and 5.5, while MariaDB issued 5.2 and 5.3 point releases.
InnoDB is a storage engine for the database management system MySQL and MariaDB. [1] Since the release of MySQL 5.5.5 in 2010, it replaced MyISAM as MySQL's default table type. [2] [3] It provides the standard ACID-compliant transaction features, along with foreign key support (declarative referential integrity).
Create/alter table: Yes - can create table, alter its definition and data, and add new rows; Some - can only create/alter table definition, not data; Browse table: Yes - can browse table definition and data; Some - can only browse table definition; Multi-server support: Yes - can manage from the same window/session multiple servers
PHP; one of MariaDB, MySQL, PostgreSQL, SQLite [101] Yes SharePoint Foundation Windows Server IIS: Optional SQL Server SharePoint Server Windows Server or SaaS IIS or SaaS Optional SQL Server Socialtext: N/A: hosted no, all needed components included no, all needed components included Swiki: Linux, Unix, Windows, others
Each MyISAM table is stored on disk in three files (if it is not partitioned). The files have names that begin with the table name and have an extension to indicate the file type. MySQL uses a .frm file to store the definition of the table, but this file is not a part of the MyISAM engine; instead it is a part of the server.