• Object Databases:These days OOP concepts have also been introduced indatabasesystems to develop a newDBMSnamed object databases. These databases store the data directly in the form of objects. However, these databases are not as popular as the traditional RDBMS. ...
A tool or function provided by the DBMS (Database Management System) that makes an execution plan visible. Execution plan: A parsed, optimized, compiled and executable SQL statement stored in the so-called SQL cache of the database. Using the explain plan the SQL execution flow of this plan...
This package provides several PL/SQL interfaces to display the plan from different sources: EXPLAIN PLAN command V$SQL_PLAN Automatic Workload Repository (AWR) SQL Tuning Set (STS) SQL Plan Baseline (SPM) Using the EXPLAIN PLAN Command and the DBMS_XPLAN.DISPLAY ...
A plan table name if you are using a table different than PLAN_TABLE A statement ID if you have set a statement ID with the EXPLAIN PLAN A format option that determines the level of detail: BASIC, SERIAL, and TYPICAL, ALL, Some examples of the use of DBMS_XPLAN to display PLAN_TA...
If you don't name the query blocks in a statement, Oracle will generate query block names for you. To see those names automatically, run an EXPLAIN PLAN on your statement followed by a query using the ALL option of DBMS_XPLAN.DISPLAY: ...
The plan table can have any name you like, but the names and data types of the columns are not flexible. You will find a script called utlxplan.sql in $ORACLE_HOME/rdbms/admin that creates a plan table with the name plan_table in the local schema. If you use this script to create...