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How To Rename a Column in an Existing Table
How To Rename a Column in an Existing Table? - Oracle DBA FAQ - Managing Oracle Database Tables Let's say you have an existing with an existing column, but you don't like the name of that column, can you rename that column name? The answer is yes. You can use the ALTER TABLE ... RENAME COLUMN statem... 2007-05-03, 5297👍, 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, 5297👍, 0💬

How To List All Tables in Your Schema
How To List All Tables in Your Schema? - Oracle DBA FAQ - Managing Oracle Database Tables If you log in with your Oracle account, and you want to get a list of all tables in your schema, you can get it through the USER_TABLES view with a SELECT statement, as shown in the following SQL script: SQL> c... 2007-05-04, 5293👍, 0💬

How To Set a Transaction To Be READ ONLY
How To Set a Transaction To Be READ ONLY? - Oracle DBA FAQ - Understanding SQL Transaction Management If you want a transaction to be set as READ ONLY, you need to the transaction with the SET TRANSACTION READ ONLY statement. Note that a DML statement will start the transaction automatically. So you... 2007-04-17, 5292👍, 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, 5290👍, 0💬

How To Loop through a Cursor Variable
How To Loop through a Cursor Variable? - Oracle DBA FAQ - Working with Cursors in PL/SQL Once a cursor variable is opened with a query statement, it will have the same attributes as a normal cursor and it can be used in the same way a normal cursor too. The following sample script shows you how to l... 2007-04-28, 5289👍, 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 - Understanding SQL DDL Statements 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 t... 2007-04-22, 5286👍, 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, 5282👍, 0💬

How To Delete an Existing Row from a Table
How To Delete an Existing Row from a Table? - Oracle DBA FAQ - Understanding SQL DML Statements If you want to delete an existing row from a table, you can use the DELETE statement with a WHERE clause to identify that row. Here is good sample of DELETE statements: INSERT INTO fyi_links (url, id) VAL... 2007-04-21, 5275👍, 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, 5274👍, 0💬

How To Create a Stored Procedure
How To Create a Stored Procedure? - Oracle DBA FAQ - Creating Your Own PL/SQL Procedures and Functions A stored procedure is a procedure with a specified name and stored into the current database. If you want to create a stored procedure, you can use the CREATE PROCEDURE statement. The example scrip... 2007-04-26, 5264👍, 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, 5262👍, 0💬

How To Drop a Stored Function
How To Drop a Stored Function? - Oracle DBA FAQ - Creating Your Own PL/SQL Procedures and Functions If there is an existing stored function and you don't want it any more, you can remove it from the database by using the DROP FUNCTION statement as shown in the following script example: SQL> CREATE O... 2007-04-25, 5259👍, 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, 5256👍, 0💬

What Privilege Is Needed for a User to Delete Rows from Tables in Another Schema
What Privilege Is Needed for a User to Delete Rows from Tables in Another Schema? - Oracle DBA FAQ - Managing Oracle User Accounts, Schema and Privileges For a user to delete rows from tables of someone else's schema, he/she needs the DELETE ANY TABLE privilege. The following tutorial exercise gives... 2007-05-01, 5253👍, 0💬

How To Write an Inner Join with the WHERE Clause
How To Write an Inner Join with the WHERE Clause? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements If you don't want to use the INNER JOIN ... ON clause to write an inner join, you can put the join condition in the WHERE clause as shown in the following query example: SQL> SELECT d.depar... 2007-04-19, 5253👍, 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, 5252👍, 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, 5252👍, 0💬

How To Add a New Column to an Existing Table
How To Add a New Column to an Existing Table? - Oracle DBA FAQ - Managing Oracle Database Tables If you have an existing table with existing data rows, and want to add a new column to that table, you can use the ALTER TABLE ... ADD statement to do this. Here is an example script: SQL> connect HR/fyi... 2007-05-03, 5251👍, 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, 5251👍, 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, 5241👍, 0💬

How To Use Values from Other Tables in UPDATE Statements
How To Use Values from Other Tables in UPDATE Statements? - Oracle DBA FAQ - Understanding SQL DML Statements If you want to update values in one with values from another table, you can use a subquery in the SET clause. The subquery should return only one row for each row in the update table that ma... 2007-04-21, 5239👍, 0💬

How To Get Execution Statistics Reports on Query Statements
How To Get Execution Statistics Reports on Query Statements? - Oracle DBA FAQ - Introduction to Command-Line SQL*Plus Client Tool If your user account has autotrace configured by the DBA, you can use the "SET AUTOTRACE ON STATISTICS" command to turn on execution statistics reports on query statement... 2007-04-30, 5236👍, 0💬

How To Specify Default Values in INSERT Statement
How To Specify Default Values in INSERT Statement? - Oracle DBA FAQ - Understanding SQL DML Statements If a column is defined with a default value in a table, you can use the key word DEFAULT in the INSERT statement to take the default value for that column. The following tutorial exercise gives a g... 2007-04-21, 5229👍, 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