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10 Reasons for the Success of Db2 for z/OS

Db2 for z/OS has proven successful for decades not because of any single feature, but because it consistently delivers on the things that matter most for mission-critical enterprise computing. The biggest reasons fall into a few clear and convincing categories.…

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Don't Forget About Histogram Statistics in Db2 for z/OS

There are a lot of options and parameters to consider when putting together your RUNSTATS jobs to collect statistics on your Db2 data. For those who do not know, RUNSTATS is a Db2 for z/OS utility program that is used to collect information about characteristics of tables and indexes, and storing that data in the Db2 Catalog where it can be used by the Db2 Optimizer to formulate SQL access…

A Few Details on the TRUNCATE Statement

TRUNCATE is a simple, yet frequently forgotten way to remove data from your Db2 tables.

The TRUNCATE statement is simply a quick way to remove allof the data from a table. The table can be in any type of table space. And the table can be a declared global temporary table. If the tablecontains LOB or XML columns, the corresponding table spaces and indexes arealso truncated.

For clarification, consider the following example:…