Updating multiple tables in oracle
They learn about declaring variables, trapping exceptions and they also learn to declare and control cursors.In class students learn to develop, execute and manage PL\SQL stored program units like procedures, functions, packages and database triggers.
At this skill level, OCA has the foundation of knowledge that will allow him/her to act as a entry-level database administrator or application developer. As a Oracle Certified Associate, you will cultivate industry-supported skills and credentials that you will be able to transfer to future employment opportunities.With your OCA certification, you will be able to demonstrate and promote the fact that you have the necessary skills to do your job effectively and you are certified by Oracle Coprporation the leader in Database Management Systems.The following tables show the exams and the corresponding courses for OCA.This course introduces students to the fundamentals of SQL using Oracle Database 11g database technology.In this course students learn the concepts of relational databases and the powerful SQL programming language.As the number if distinct values increases, the size of the bitmap increases exponentially, such that an index with 100 values may perform thousands of times faster than a bitmap index on 1,000 distinct column values.
Also, remember that bitmap indexes are only suitable for static tables and materialized views which are updated at nigh and rebuilt after batch row loading.
The real benefit of bitmapped indexing occurs when one table includes multiple bitmapped indexes. The creation of multiple bitmapped indexes provides a very powerful method for rapidly answering difficult SQL queries.
However, combining these indexes together in a query can provide blistering response times a lot faster than the traditional method of reading each one of the 20 million rows in the base table.
This course provides the essential SQL skills that allow developers to write queries against single and multiple tables, manipulate data in tables, and create database objects.
The students also learn to use single row functions to customize output, use conversion functions and conditional expressions and use group functions to report aggregated data.
Demonstrations and hands-on practice reinforce the fundamental concepts.