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IBM Db2 11.1 Certification Guide
book

IBM Db2 11.1 Certification Guide

by Robert (Kent) Collins, Mohankumar Saraswatipura
June 2018
Intermediate to advanced content levelIntermediate to advanced
478 pages
10h 52m
English
Packt Publishing
Content preview from IBM Db2 11.1 Certification Guide

EXPLAIN facility tools

The EXPLAIN facility provides the capability to capture and view detailed information about the access plan chosen for a particular SQL statement. This information includes performance data that can be used to identify poorly written or executing queries.

The EXPLAIN facility uses a special set of tables to store the information about the queries. These tables can be created by running the EXPLAIN.DDL script found in the sqllib/misc directory or by executing the SYSINSTALLOBJECTS procedure:

CALL SYSPROC.SYSINSTALLOBJECTS('EXPLAIN', 'C', CAST (NULL AS VARCHAR (128)), 'DBA');

The following table showcases the different tools available within the Db2 Explain facility. The visual explain tool is a graphical interface provided ...

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Publisher Resources

ISBN: 9781788626910Other