By Craig S. Mullins
DB2 Developer's consultant is the field's number 1 go-to resource for on-the-job details on programming and administering DB2 on IBM z/OS mainframes. Now, three-time IBM details Champion Craig S. Mullins has completely up-to-date this vintage for DB2 v9 and v10. Mullins absolutely covers new DB2 ideas together with temporal database help; hashing; common tablespaces; pureXML; functionality, safeguard and governance advancements; new facts forms, and masses extra. utilizing present types of DB2 for z/OS, readers will the way to: * construct greater databases and purposes for CICS, IMS, batch, CAF, and RRSAF * Write trained, code-optimized DB2 SQL * enforce effective dynamic and static SQL purposes * Use binding and rebinding to optimize functions * successfully create, administer, and deal with DB2 databases and functions * layout, construct, and populate effective DB2 database constructions for on-line, batch, and information warehousing * increase the functionality of DB2 subsystems, databases, utilities, courses, and SQL stat DB2 Developer's consultant, 6th Edition builds at the new angle that has made earlier variants so precious. It combines: * Condensed, easy-to-read assurance of all crucial themes: info differently scattered via dozens of files * exact discussions of an important information inside every one subject * professional, field-tested implementation recommendation * good examples
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Additional info for DB2 Developer's Guide: A Solutions-Oriented Approach to Learning the Foundation and Capabilities of DB2 for z/OS
Example text
DB2 V2R3 is also the version that beefed up distributed support with Distributed Relational Database Architecture (DRDA). Remote unit of work distribution was not available in the initial GA version, but IBM came out with RUOW support for DB2 V2R3 in March 1992. DB2 Version 3 was announced in November 1993 and GA in December 1993. Now it may look like things sped up again here, but not really. This is when the QPP program for early support of DB2 started. QPP was announced in March 1993 and delivered to customers in June 1993.
Must define input and output files. WORKING-STORAGE SECTION. ŠŠŠŠMust declare all necessary variables. 01ŠŠEMPLOYEE-LAYOUT. ŠŠŠŠ05ŠŠEMPNOŠŠŠŠŠŠŠŠPIC X(6). ŠŠŠŠ05ŠŠFIRSTNMEŠŠŠŠŠPIC X(12). ŠŠŠŠ05ŠŠMIDINITŠŠŠŠŠŠPIC X. ŠŠŠŠ05ŠŠLASTNAMEŠŠŠŠŠPIC X(15). ŠŠŠŠ05ŠŠWORKDEPTŠŠŠŠŠPIC X(3). ŠŠŠŠ05ŠŠPHONENOŠŠŠŠŠŠPIC X(4). ŠŠŠŠ05ŠŠHIREDATEŠŠŠŠŠPIC X(10). ŠŠŠŠ05ŠŠJOBŠŠŠŠŠŠŠŠŠŠPIC X(8). ŠŠŠŠ05ŠŠEDLEVELŠŠŠŠŠŠPIC S9(4) COMP. ŠŠŠŠ05ŠŠSEXŠŠŠŠŠŠŠŠŠŠPIC X. ŠŠŠŠ05ŠŠBIRTHDATEŠŠŠŠPIC X(10). ŠŠŠŠ05ŠŠSALARYŠŠŠŠŠŠŠPIC S9(7)V99 COMP-3.
This information is encoded in the high-level language and is difficult to change after it has been programmed. SQL, on the other hand, is designed so that the programmer can specify what data is needed but cannot specify how to retrieve it. SQL is coded without embedded data-navigational instructions. 舡 These data-navigational instructions are called access paths. By forcing the DBMS to determine the optimal access path to the data, a heavy burden is removed from the programmer. In addition, the database can have a better understanding of the state of the data it stores, and thereby can produce a more efficient and dynamic access path to the data.
