Indexes. They're one of the most powerful and misunderstood aspects of SQL performance. In this post we'll look at the purpose of an index, how to create and choose choose your index type. Then finish with a discussion of how to decide what to index and
The insert statement adds a new row or rows in a table in theOracle database. We generally use it after we have created a table in the database. One important point to remember is that while inserting records into a table, we must provide a value for every NOT NULL value. Let us lo...
The New Project wizard in the IDE includes a new project type for Oracle Database applications. To create an Oracle Database project, do the following:Choose File -> New Project. On the Choose Project page of the New Project wizard, select the C/C++/Fortran category and the C/C++ Data...
Use the SQL command DROP VIEW to drop a view. For example: DROP VIEW Accounts_staff;Modifying a Join View Oracle allows you, with some restrictions, to modify views that involve joins. Consider the following simple view: CREATE VIEW Emp_view AS SELECT Ename, Empno, deptno FROM Emp;...
Create an Oracle Data Guard Broker configuration for the primary database. You use thedgmgrlcommand to create the Oracle Data Guard Broker configuration. You need to know the name of the Oracle Data Guard Broker configuration that you want to create, the name of the primary database, and the...
year, then the performance is improve since oracle will scan only a single partition instead of whole table. CREATING PARTITION TABLES To create a partition table give the following statement create table sales (year number(4), product varchar2(10), ...
Oracle Database - Enterprise Edition - Version 11.2.0.3 and later: How to calculate the number of columns in a create index statement giving ORA-01793: Maximum Numbe
how to create index in table for a column vishal barot May 06, 2010 12:24AM Re: how to create index in table for a column Rick James May 08, 2010 12:35AM Sorry, you can't reply to this topic. It has been closed.Content reproduced on this site is the property of the respectiv...
and in 8i and above - DBMS_STATS.GATHER_SCHEMA_STATS The analyze table can be used to create statistics for 1 table, index or cluster. Syntax: ANALYZE table tableName {compute|estimate|delete) statistics options ANALYZE table indexName {compute|estimate|delete) statistics options ...
Prerequisites: Checkif ORACLE_HOME isAlreadySet To see if the “ORACLE_HOME” environment is set in the Windows system or not. For that purpose, open the Command Prompt and type this command given below: echo %ORACLE_HOME% If you have not seen the version in the output, it means your ...