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What Is Oracle
What Is Oracle? - Oracle DBA FAQ - Oracle Basic Concepts Oracle is a company. Oracle is also a database server, which manages data in a very structured way. It allows users to store and retrieve related data in a multiuser environment so that many users can concurrently access the same data. All thi... 2007-04-21, 5466👍, 0💬

How To Execute a Stored Procedure
How To Execute a Stored Procedure? - Oracle DBA FAQ - Creating Your Own PL/SQL Procedures and Functions If you want to execute a stored procedure, you can use the EXECUTE statement. The example script below shows how to executes a stored procedure: SQL> set serveroutput on; SQL> CREATE PROCEDURE Gre... 2007-04-26, 5463👍, 0💬

How To Join Two Tables in a Single Query
How To Join Two Tables in a Single Query? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements Two tables can be joined together in a query in 4 ways: Inner Join: Returns only rows from both tables that satisfy the join condition. Left Outer Join: Returns rows from both tables that satisfy t... 2007-04-20, 5461👍, 0💬

How To Work with Data Objects Interactively
How To Work with Data Objects Interactively? - Oracle DBA FAQ - Introduction to Oracle SQL Developer You can work with data objects through SQL statements in statement area. If you want to work with data objects interactively, you should use the object browser. The following tutorial steps help you ... 2007-04-27, 5460👍, 0💬

How To Check the Server Version
How To Check the Server Version? - Oracle DBA FAQ - Introduction to Oracle Database 10g Express Edition Oracle server sersion information is stored in a table called: PRODUCT_COMPONENT_VERSION. You can use a simple SELECT statement to view the version information like this: >.\bin\sqlplus Enter user... 2007-04-25, 5460👍, 0💬

What is System Global Area (SGA)
What is System Global Area (SGA)? - Oracle DBA FAQ - Oracle Basic Concepts The System Global Area (SGA) is a memory area that contains data shared between all database users such as buffer cache and a shared pool of SQL statements. The SGA is allocated in memory when an Oracle database instance is s... 2007-04-21, 5456👍, 0💬

How To Export Your Own Schema
How To Export Your Own Schema? - Oracle DBA FAQ - Loading and Exporting Data If you have a non-system user account and you want to export all data objects in the schema associated with your account, you can use the "expdp" command with the SCHEMAS parameter. Running "expdp" command with a non-system... 2007-05-01, 5454👍, 0💬

What Is a SQL*Loader Control File
What Is a SQL*Loader Control File? - Oracle DBA FAQ - Loading and Exporting Data A SQL*Loader control file a text that defines how data files should be loaded into the database. It allows you to specify: Where is the input data file. The format of the input date file. The target table where the data... 2007-04-30, 5454👍, 0💬

How To Use Regular Expression in Pattern Match Conditions
How To Use Regular Expression in Pattern Match Conditions? - Oracle DBA FAQ - Understanding SQL Basics If you have a pattern that is too complex for LIKE to handle, you can use the regular expression pattern patch function: REGEXP_LIKE(). The following script provides you some good examples: SELECT ... 2007-04-22, 5453👍, 0💬

How To Create a New Table by Selecting Rows from Another Table
How To Create a New Table by Selecting Rows from Another Table? - Oracle DBA FAQ - Managing Oracle Database Tables Let's say you have a table with many data rows, now you want to create a backup copy of this table of all rows or a subset of them, you can use the CREATE TABLE...AS SELECT statement to... 2007-05-03, 5450👍, 0💬

What Is a RECORD in PL/SQL
What Is a RECORD in PL/SQL? - Oracle DBA FAQ - Working with Database Objects in PL/SQL RECORD is a composite data type in PL/SQL. It can have many fields representing data elements with different data types. Variables of RECORD type can be designed to hold data from database table rows. To use RECOR... 2007-04-27, 5448👍, 0💬

How To Define an External Table with a Text File
How To Define an External Table with a Text File? - Oracle DBA FAQ - Loading and Exporting Data You can use the CREATE TABLE statement to create external tables. But you need to use ORGANIZATION EXTERNAL clause to specify the external file location and the data access driver. The tutorial exercise b... 2007-04-30, 5443👍, 0💬

How To Use IN Conditions
How To Use IN Conditions? - Oracle DBA FAQ - Understanding SQL Basics An IN condition is single value again a list of values. It returns TRUE, if the specified value is in the list. Otherwise, it returns FALSE. Some examples are given in the script below: SELECT CASE WHEN 3 IN (1,2,3,5) THEN 'TRUE' ... 2007-04-23, 5441👍, 0💬

What Privilege Is Needed for a User to Query Tables in Another Schema
What Privilege Is Needed for a User to Query Tables in Another Schema? - Oracle DBA FAQ - Managing Oracle User Accounts, Schema and Privileges For a user to run queries (SELECT statements) on tables of someone else's schema, he/she needs the SELECT ANY TABLE privilege. The following tutorial exercis... 2007-05-01, 5433👍, 0💬

How To Create a Stored Function
How To Create a Stored Function? - Oracle DBA FAQ - Creating Your Own PL/SQL Procedures and Functions A stored function is a function with a specified name and stored into the current database. If you want to create a stored function, you can use the CREATE FUNCTION statement. The example script bel... 2007-04-26, 5432👍, 0💬

How To Change Program Global Area (PGA)
How To Change Program Global Area (PGA)? - Oracle DBA FAQ - Introduction to Oracle Database 10g Express Edition Your 10g XE server has a default setting for Program Global Area (PGA) of 40MB. The PGA size can be changed to a new value depending on how much data a single session should be allocated. ... 2007-04-24, 5431👍, 0💬

How To Set Up SQL*Plus Output Format
How To Set Up SQL*Plus Output Format? - Oracle DBA FAQ - Understanding SQL DML Statements If you want to practice SQL statements with SQL*Plus, you need to set up your SQL*Plus output formatting parameter properly. The following SQL*Plus commands shows you some examples: COLUMN id FORMAT 9999; COLUM... 2007-04-22, 5427👍, 0💬

What Is the Data Pump Export Utility
What Is the Data Pump Export Utility? - Oracle DBA FAQ - Loading and Exporting Data Oracle Data Pump Export utility is a standalone programs that allows you to export data objects from Oracle database to operating system files called dump file set, which can be imported back to Oracle database only ... 2007-05-01, 5426👍, 0💬

How To Change User Password
How To Change User Password? - Oracle DBA FAQ - Managing Oracle User Accounts, Schema and Privileges If you want to change a user's password, you can log in as SYSTEM and use the ALTER USER command as shown in the following example: >.\bin\sqlplus /nolog SQL> connect SYSTEM/fyicenter Connected. SQL>... 2007-05-02, 5421👍, 0💬

What is Program Global Area (PGA)
What is Program Global Area (PGA)? - Oracle DBA FAQ - Oracle Basic Concepts A Program Global Area (PGA) is a memory buffer that is allocated for each individual database session and it contains session specific information such as SQL statement data or buffers used for sorting. The value specifies t... 2007-04-21, 5420👍, 0💬

Why Cursor Variables Are Easier to Use than Cursors
Why Cursor Variables Are Easier to Use than Cursors? - Oracle DBA FAQ - Working with Cursors in PL/SQL Cursor variables are easier to use than cursors because: Cursor variables are easier to define. No need to give a specific query statement. Cursor variables are easier to open. You can specify the ... 2007-04-28, 5417👍, 0💬

How To Use Existing Values in UPDATE Statements
How To Use Existing Values in UPDATE Statements? - Oracle DBA FAQ - Understanding SQL DML Statements If a row matches the WHERE clause in a UPDATE statement, existing values in this row can be used in expressions to provide new values in the SET clause. Existing values are represented by columns in ... 2007-04-21, 5417👍, 0💬

How To Retrieve Values from Data Fields in RECORD Variables
How To Retrieve Values from Data Fields in RECORD Variables? - Oracle DBA FAQ - Working with Database Objects in PL/SQL If a variable is a RECORD variable with data fields assigned values, you can retrieve those values out of its data fields by using fields names prefixed with variable name as "vari... 2007-04-27, 5415👍, 0💬

What Is the Implicit Cursor
What Is the Implicit Cursor? - Oracle DBA FAQ - Working with Database Objects in PL/SQL The implicit cursor is the cursor automatically defined by PL/SQL for you. Whenever a SQL statement is executed, this cursor will be assigned to represent the execution of this statement. This implicit cursor is ... 2007-04-27, 5409👍, 0💬

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.NET C C++ CSS DBA General HTML Java JavaScript JSP JUnit MySQL Networking Oracle Perl Perl PHP PL/SQL RSS Software QA SQL Server Struts Unix Windows XHTML XML