DB2 Developer's Guide by Craig S. Mullins

By Craig S. Mullins

Study the easiest thoughts and tips from specialist writer Craig Mullins. follow those real-world items of recommendation, undocumented assistance, strategies, initiatives, and methods on your personal database administration procedure. Mullins grants what you want to take your DB2 improvement to the subsequent level.Written via a developer for builders, DB2 Developer¿s consultant, 5th variation presents a solutions-oriented method of studying the root and services of this most modern model of the world¿s no 1 database administration system.LEARN THE techniques AND construct THE functions * enforce cutting edge shortcuts, counsel, methods, innovations, and improvement instructions to optimize all points of DB2 improvement and management * comprehend the tips for binding DB2 program plans and applications * Use specialist recommendation to enforce allotted DB2 functions * attach your DB2 databases to the realm extensive net * overview exhaustive insurance of V6 topics¿including triggers, user-defined services, saved strategy extensions, predictive governing, hiperspace bufferpools, the REBUILD software, the DSSIZE parameter, user-defined detailed forms, auxiliary tables, and extra * learn implementation info and information for big gadgets to shop multimedia data¿such as audio, video, and images¿in your DB2 for OS/390 databases (BLOBs, CLOBs, DBCLOBs, and DB2 extenders) * find out how and why to exploit the hot clarify tables - DSN_STATEMNT_TABLE and DSN_FUNCTION_TABLE * observe the way to enforce a procedural DBA functionality to control triggers, saved systems, and UDFs"

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6. For example, INSTALL SYSOPR is composed of IMAGCOPY authority for the DB2 Catalog and SYSOPR authority, which in turn is composed of the DISPLAY, RECOVER, STOPALL, and TRACE authorities. The effective administration of these levels of security often is a job in itself. Most organizations simplify authorization to DB2 objects using secondary authids. With secondary authids, sets of similar users can be assigned to an authorization group, and security can be granted to the group. In this way, fewer GRANT and REVOKE statements are required to administer DB2 security.

STATIC SQL UPDATE STATEMENT IF SQLCODE < 0 PERFORM ERROR_ROUTINE. OPEN-CSR. EXEC SQL OPEN CSR1 END-EXEC. CLOSE-CSR. EXEC SQL CLOSE CSR1 OPEN & CLOSE CURSOR STATEMENTS END-EXEC. To embed static SQL in a host program, you must prepare for the impedance mismatch between a high-level language and SQL. Impedance mismatch refers to the difference between set-at-a-time processing and record-at-a-time processing. High-level languages access data one record at a time, whereas SQL accesses data at a set level.

A database holds no data of its own, but exists to group DB2 objects. A database can function also as a unit of start and stop for the DB2 objects defined to it or as a unit of control for the administration of DB2 security. INDEX A DB2 object that consists of one or more VSAM data sets. To achieve more efficient access to DB2 tables, these data sets contain pointers ordered based on the value of data in specified columns of that table. STOGROUP A series of DASD volumes assigned a unique name and used to allocate VSAM data sets for DB2 objects.

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