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How To Call a Stored Function
How To Call a Stored Function? - Oracle DBA FAQ - Creating Your Own PL/SQL Procedures and Functions A stored function can be called as part of expression in any PL/SQL statement. One simplest way to call a stored function is to a dummy SELECT statement as shown in the following tutorial script using... 2007-04-26, 5357👍, 0💬

What Is a Function
What Is a Function? - Oracle DBA FAQ - Understanding PL/SQL Language Basics A function is a named program unit. It consists of three parts: Declaration Part - Defining the function name, calling parameters, return value type, local variables and local procedures. Declaration part is required. Execut... 2007-04-30, 5351👍, 0💬

How To Get Execution Path Reports on Query Statements
How To Get Execution Path 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 EXPLAIN" command to turn on execution path reports on query statements. The tutorial... 2007-04-30, 5351👍, 0💬

How Many Scalar Data Types Are Supported in PL/SQL
How Many Scalar Data Types Are Supported in PL/SQL? - Oracle DBA FAQ - Understanding PL/SQL Language Basics PL/SQL supports many scalar data types divided into 4 groups: Numeric Types: BINARY_DOUBLE, BINARY_FLOAT, BINARY_INTEGER, DEC, DECIMAL, DOUBLE PRECISION, FLOAT, INT, INTEGER, NATURAL, NATURALN... 2007-04-30, 5342👍, 0💬

How To Delete All Rows a Table
How To Delete All Rows a Table? - Oracle DBA FAQ - Understanding SQL DML Statements If you want to delete all rows from a table, you have two options: Use the DELETE statement with no WHERE clause. Use the TRUNCATE TABLE statement. The TRUNCATE statement is more efficient the DELETE statement. The t... 2007-04-21, 5337👍, 0💬

How To Invoke the Data Pump Import Utitlity
How To Invoke the Data Pump Import Utitlity? - Oracle DBA FAQ - Loading and Exporting Data The Data Pump Import utility is distributed as executable file called "impdp.exe". To invoke this utility, you should go to the "bin" directory of your Oracle server installation and run the "impdp" command. H... 2007-05-01, 5336👍, 0💬

How To Use NULL as Conditions
How To Use NULL as Conditions? - Oracle DBA FAQ - Understanding SQL Basics If you want to compare values against NULL as conditions, you should use the "IS NULL" or "IS NOT NULL" operator. Do not use "=" or "&lt;>" against NULL. The sample script below shows you some good examples: SELECT 'A' IS... 2007-04-23, 5336👍, 0💬

How To Write a Left Outer Join with the WHERE Clause
How To Write a Left Outer Join with the WHERE Clause? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements If you don't want to use the LEFT OUTER JOIN ... ON clause to write a left outer join, you can use a special criteria in the WHERE clause as "left_table.column = right_table.column(+)".... 2007-04-19, 5331👍, 0💬

How To Bring a Tablespace Online
How To Bring a Tablespace Online? - Oracle DBA FAQ - Managing Oracle Tablespaces and Data Files If you have brought a tablespace offline, now you want to make it available to users again, you can use the ALTER TABLESPACE ... ONLINE statement as shown in the following script: SQL> connect HR/fyicente... 2007-05-03, 5330👍, 0💬

How To Create a Procedure Interactively
How To Create a Procedure Interactively? - Oracle DBA FAQ - Introduction to Oracle SQL Developer If you want to create a stored procedure interactively, you can use the following steps: Open you connection name, like Local_XE. Right-click Procedures. Select Create PROCEDURE. The Create Procedure win... 2007-04-28, 5322👍, 0💬

How To Create Your Own Reports in SQL Developer
How To Create Your Own Reports in SQL Developer? - Oracle DBA FAQ - Introduction to Oracle SQL Developer Oracle SQL Developer also lets you create your own reports. See the following steps on how to do this: Click menu View. Selects Reports from the menu. Open Reports. Right-click on User Defined Re... 2007-04-27, 5322👍, 0💬

What Is NULL
What Is NULL? - Oracle DBA FAQ - Understanding SQL Basics NULL is a special value representing "no value" in all data types. NULL can be used on in operations like other values. But most opertations has special rules when NULL is involved. The tutorial exercise below shows you some examples: SET NUL... 2007-04-23, 5322👍, 0💬

How To Update a Table Row with a Record
How To Update a Table Row with a Record? - Oracle DBA FAQ - Working with Database Objects in PL/SQL If you have a RECORD variable with data fields matching a table structure, you can update a row in this table with this RECORD variable using the UPDATE ... SET ROW statement as shown in the sample sc... 2007-04-26, 5320👍, 0💬

How To Rebuild an Index
How To Rebuild an Index? - Oracle DBA FAQ - Managing Oracle Table Indexes If you want to rebuild an index, you can use the "ALTER INDEX ... REBUILD statement as shown in the following SQL script: SELECT index_name, table_name, uniqueness FROM USER_INDEXES WHERE table_name = 'EMPLOYEES'; INDEX_NAME T... 2007-04-27, 5314👍, 0💬

How To Pass Parameters to Procedures
How To Pass Parameters to Procedures? - Oracle DBA FAQ - Introduction to PL/SQL Store procedures or functions can take parameters. You need to define parameters while defining the procedure, and providing values to parameters while calling the procedure. The script below shows you how to do this: SQ... 2007-04-26, 5307👍, 0💬

How To Run the Anonymous Block Again
How To Run the Anonymous Block Again? - Oracle DBA FAQ - Introduction to PL/SQL If you have an anonymous block defined in your session, you can run it any time by using the "/" command as shown in the following script: SQL> set serveroutput on; SQL> begin 2 dbms_output.put_line('This is a PL/SQL FAQ... 2007-04-25, 5301👍, 0💬

How To View the Dropped Tables in Your Recycle Bin
How To View the Dropped Tables in Your Recycle Bin? - Oracle DBA FAQ - Managing Oracle Database Tables You can look what's in your recycle bin through the predefined view called RECYCLEBIN. You can use the SELECT statement to list the dropped tables as shown in the following script: SQL> connect HR/... 2007-05-04, 5299👍, 0💬

What Is a Dead Lock
What Is a Dead Lock? - Oracle DBA FAQ - Understanding SQL Transaction Management A dead lock is phenomenon happens between two transactions with each of them holding a lock that blocks the other transaction as shown in the following diagram: (transaction 1) (transaction 2) update row X to create loc... 2007-04-17, 5294👍, 0💬

How To Do Clean Up If CREATE DATABASE Failed
How To Do Clean Up If CREATE DATABASE Failed? - Oracle DBA FAQ - Creating New Database Instance Manually To better organize data files, you should create a dedicated directory for each Oracle database. This can be done by using Windows file explorer to create the \oraclexe\oradata\fyi\ directory. Tr... 2007-04-23, 5290👍, 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, 5284👍, 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, 5283👍, 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, 5279👍, 0💬

How To Use "OUT" Parameter Properly
How To Use "OUT" Parameter Properly? - Oracle DBA FAQ - Creating Your Own PL/SQL Procedures and Functions Here are the rules about OUT parameters: A formal OUT parameter acts like an un-initialized variable. It must be assigned with new values before the end of the procedure or function. An actual O... 2007-04-21, 5279👍, 0💬

What Is SQL*Plus
What Is SQL*Plus? - Oracle DBA FAQ - Introduction to Command-Line SQL*Plus Client Tool SQL*Plus is an interactive and batch query tool that is installed with every Oracle Database Server or Client installation. It has a command-line user interface, a Windows Graphical User Interface (GUI) and the iS... 2007-04-28, 5278👍, 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