MSS provides built-in support for the same XA-compliant database managers as Server Enterprise Edition without MSS.
You can add support for other XA-compliant database managers. To do this, you write and compile a switch module for the database. See the database vendor's documentation for advice on how to do this.
You can configure the database managers using either the Edit Server page in Enterprise Server Administration, or the CICS XAT page in ESMAC.
The support for relational database managers enables CICS applications to issue database DDL and DML statements in the form of embedded Structured Query Language. SQL requests are structured in a similar way to CICS commands. Using them, you can create, modify and query data tables.