![]() |
| Home | Tech FAQ | Interview Questions | Placement Papers | Tech Articles | Learn | Freelance Projects | Online Testing | Geeks Talk | Job Postings | Knowledge Base | Site Search | Add/Ask Question |
![]() Related Questions A Read-Only transaction ensures that the results of each query executed in the transaction are consistant with respect to the same point in time. Latest Answer : it will reads the data firsrt and then executes the transaction ... The goal of the optimizer is to choose the most efficient way to execute a SQL statement. Latest Answer : The optimizer determines the most efficient way to use the tables and indexes to complete the request made by an SQL statement after considering many factors related to the objects referenced and the conditions specified in the query. ... What are the values that can be specified for OPTIMIZER_GOAL parameter of the ALTER SESSION Command ? CHOOSE,ALL_ROWS,FIRST_ROWS and RULE. What is the effect of setting the value "CHOOSE" for OPTIMIZER_GOAL, parameter of the ALTER SESSION Command ? The Optimizer chooses Cost_based approach and optimizes with the goal of best throughput if statistics for atleast one of the tables accessed by the SQL statement exist in the data dictionary. Latest Answer : generally we use partinioning for large databases ( if a huge collection of data is there). indexing is the first most process to fast query result, ... Read Answers (1) | Asked by : rocksteady
Sponsored Links
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||