SQLTXPLAIN, also known as SQLT, is a tool provided by Oracle Server Technologies Center of Expertise – ST CoE. SQLT inputs one SQL statement and outputs a set of diagnostics files. These files are commonly used to diagnose SQL statements performing poorly. SQLT connects to the database and collects execution plans, Cost-based Optimizer CBO statistics, schema objects metadata, performance statistics, configuration parameters, and similar elements that influence the performance of the SQL being analyzed.

SQLT provides 5 main methods:

  • XTRACT Method
  • XECUTE Method
  • XTRXEC Method
  • XTRSBY Method
  • XPLAIN Method

How to Download SQLT.
All About the SQLT Diagnostic Tool (Doc ID 215187.1). Download it to any directory and unzip.

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