Db2 for z/OS: Exploiting Temporal Tables

Many IT systems require historical data to be kept, in addition to the current status information. Db2 10 for z/OS introduced temporal data support to provide this functionality, whereby the historical data is automatically maintained. This intensive course provides an in-depth look at how temporal tables may be created and exploited. This course also covers the concept and usage of archive tables, as subsequently introduced with Db2 11 for z/OS.

What you will learn

On successful completion of this course you will be able to:

identify applications that may benefit from using temporal tables
describe how temporal tables may be used to automatically handle historical data by using data versioning
explain the difference between system-period and application-period data versioning
define and use system and application-period temporal tables
describe and use the new period-specification clauses in the SQL language
use new utility options specific to temporal tables
describe and use archive tables'.

Who Should Attend

DBAs, application designers, application developers and support personnel.

Prerequisites

A good understanding of Db2 and experience of using SQL.

Duration

1 day

Fee (per attendee)

£660 (ex VAT)

This includes free online 24/7 access to course notes.

Hard copy course notes are available on request from rsmshop@rsm.co.uk

at £50.00 plus carriage per set.

Course Code

DBTT

Introduction to Temporal Tables

The need for historical data; traditional methods for handling historical data; temporal table support; system-period temporal tables; application-period temporal tables.

Defining System-Period Temporal Tables

Creating system-period temporal tables; Defining the system-period temporal table; ROW BEGIN, ROW END & TRANSACTION START ID columns; Defining the history table; Enabling system-period data versioning; Enabling an existing table for system-period data versioning; System-period data versioning example; Catalog tables.

Defining Application-Period Temporal Tables

Defining the application-period temporal table; Overlapping data; BUSINESS_TIME WITHOUT OVERLAPS; Modifying existing tables; Index creation; Catalog tables.

SQL Extensions for Temporal Tables

SYSTEM_TIME period-specification; FOR SYSTEM_TIME AS OF . . .; FOR SYSTEM_TIME FROM . . . TO . . .; FOR SYSTEM_TIME BETWEEN . . . AND . . .; BUSINESS_TIME period specification; FOR BUSINESS_TIME AS OF . .; FOR PORTION OF BUSINESS_TIME; Traditional UPDATE; UPDATE for time period - qualifying rows; Row category and behaviour; Row behaviour example (UPDATE); Row behaviour example (DELETE); Reasons to be cautious!!; Special registers and BIND options (DB2 11).

Archive Tables

Archiving old data; Archive tables (Db2 11 for z/OS); Defining archive tables; NSERT, UPDATE & MERGE behaviour; SELECT behaviour.

Db2 Utility Options for Temporal Tables

Utility restrictions; LISTDEF additions; LISTDEF behaviour examples; RECOVER utility; LOAD utility.

Practical Exercises

Defining temporal tables; manipulating and reporting data in temporal tables.