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How To Write a Query with a Left Outer Join
How To Write a Query with a Left Outer Join? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements If you want to query from two tables with a left outer join, you can use the LEFT OUTER JOIN ... ON clause in the FROM clause. The following query returns output with a left outer join from two ... 2007-04-19, 5414👍, 0💬

How To Run SQL Statements with Oracle SQL Developer
How To Run SQL Statements with Oracle SQL Developer? - Oracle DBA FAQ - Introduction to Oracle SQL Developer Once a connection is established with an Oracle server, you can enter any SQL statements in the SQL Statement area. Try yourself with the following steps: Go to the SQL Statement area Enter S... 2007-04-27, 5413👍, 0💬

How To Sort the Query Output
How To Sort the Query Output? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements If you want the returning rows to be sorted, you can specify a sorting expression in the ORDER BY clause. The following select statement returns rows sorted by the values in the "manager_id" column: SQL> SELEC... 2007-04-20, 5413👍, 0💬

What Are the System Predefined User Roles
What Are the System Predefined User Roles? - Oracle DBA FAQ - Managing Oracle User Accounts, Schema and Privileges Oracle 10g XE comes with 3 predefined roles: CONNECT - Enables a user to connect to the database. Grant this role to any user or application that needs database access. RESOURCE - Enabl... 2007-05-02, 5410👍, 0💬

How To Unlock the Sample User Account
How To Unlock the Sample User Account? - Oracle DBA FAQ - Introduction to Oracle Database 10g Express Edition Your 10g XE server comes with a sample database user account called HR. But this account is locked. You must unlock it before you can use it: Log into the server home page as SYSTEM. Click t... 2007-04-24, 5410👍, 0💬

How To Create an Initialization Parameter File
How To Create an Initialization Parameter File? - Oracle DBA FAQ - Creating New Database Instance Manually This is Step 3. To run an Oracle database as an Oracle instance, you need to create an initialization parameter file, which contains a set of initialization parameters. The easiest way to creat... 2007-04-22, 5398👍, 0💬

How To Revoke CREATE SESSION Privilege from a User
How To Revoke CREATE SESSION Privilege from a User? - Oracle DBA FAQ - Managing Oracle User Accounts, Schema and Privileges If you take away the CREATE SESSION privilege from a user, you can use the REVOKE command as shown in the following example script: >.\bin\sqlplus /nolog SQL> connect SYSTEM/fy... 2007-05-01, 5394👍, 0💬

What Happens If You Use a Wrong Connect Identifier
What Happens If You Use a Wrong Connect Identifier? - Oracle DBA FAQ - Introduction to Command-Line SQL*Plus Client Tool Of course, you will get an error, if you use a wrong connect identifier. Here is an example of how SQL*Plus react to a wrong connect identifier: SQL> CONNECT fyi/retneciyf@WRONG; ... 2007-04-28, 5394👍, 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, 5393👍, 0💬

What Are DDL Statements
What Are DDL Statements? - Oracle DBA FAQ - Understanding SQL DDL Statements DDL (Data Definition Language) statements are statements to create and manage data objects in the database. The are 3 primary DDL statements: CREATE - Creating a new database object. ALTER - Altering the definition of an ex... 2007-04-22, 5393👍, 0💬

What Are the General Rules on Data Consistency
What Are the General Rules on Data Consistency? - Oracle DBA FAQ - Understanding SQL Transaction Management All SQL statements always work with a snapshot of the database to provide data consistency. For READ WRITE transactions, the snapshot is taken when each statement starts. For READ ONLY transac... 2007-04-17, 5382👍, 0💬

How To Get a List of All Background Sessions in the Database
How To Get a List of All Background Sessions in the Database? - Oracle DBA FAQ - Introduction to Oracle SQL Developer If you don't like to use a SELECT statement to get a list of all background sessions in the current database, you can use the Reports view to do this as shown in the following tutori... 2007-04-27, 5379👍, 0💬

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, 5378👍, 0💬

How To Assign Values to Data Fields in RECORD Variables
How To Assign Values to Data Fields in RECORD Variables? - Oracle DBA FAQ - Working with Database Objects in PL/SQL If a variable is a RECORD variable, you can assign values to its data fields by using fields names prefixed with variable name as "variable.field_name". Here is a sample script assigni... 2007-04-27, 5376👍, 0💬

Can the Query Output Be Sorted by Multiple Columns
Can the Query Output Be Sorted by Multiple Columns? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements You can specifying multiple columns in the ORDER BY clause as shown in the following example statement, which returns employees' salaries sorted by department and salary value: SQL> SELEC... 2007-04-20, 5376👍, 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, 5374👍, 0💬

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, 5372👍, 0💬

What Happens If Variable Names Collide with Table/Column Names
What Happens If Variable Names Collide with Table/Column Names? - Oracle DBA FAQ - Working with Database Objects in PL/SQL When a variable name collides with a column name, PL/SQL will use it as the variable if it is used where variable is allowed; It will be used as the column, if it is used where ... 2007-04-28, 5372👍, 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, 5372👍, 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, 5371👍, 0💬

How To Create a Table Interactively
How To Create a Table Interactively? - Oracle DBA FAQ - Introduction to Oracle SQL Developer If you don't want to use SQL statements to create a new table, you use SQL Developer to create one interactively. Follow the steps below to create a new table called: TIP Right-click on the Tables in the obj... 2007-04-27, 5371👍, 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, 5368👍, 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, 5368👍, 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, 5367👍, 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