What is rule base and cost base optimizer?

Answer Posted / chandra shekher

Rule based optimiser will optimise the query based on the
rules.

Cost based optimiser will optimise the query based on the
statistics available for the table.

Is This Answer Correct ?    4 Yes 1 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Is sql a scripting language?

690


Does view contain data?

788


what is the difference between ereg_replace() and eregi_replace()? : Sql dba

763


- Types of triggers - View - Dcl - Procedures, packages, functions - Metasolve - Can use Dcl in triggers - package case study - Cursor and its types - triggers schedule - Wrap - Why we are using fetch and for in cursor. difference?

1581


Is it possible to sort a column using a column alias?

816






What is the most restrictive isolation level? : Transact sql

768


How do you copy a table in sql?

751


What operators deal with null?

813


how to check myisam tables for errors? : Sql dba

883


How do I start sql from command line?

707


What is the difference between a database and a relational database?

765


What is sql engine in oracle?

721


How delete a row in sql?

717


Define overloaded procedure?

803


describe transaction-safe table types in mysql : sql dba

701