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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, 5348👍, 0💬

How To Pass a Cursor Variable to a Procedure
How To Pass a Cursor Variable to a Procedure? - Oracle DBA FAQ - Working with Cursors in PL/SQL A cursor variable can be passed into a procedure like a normal variable. The sample script below gives you a good example: CREATE OR REPLACE PROCEDURE FYI_CENTER AS sys_cur SYS_REFCURSOR; PROCEDURE emp_pr... 2007-04-28, 5348👍, 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, 5347👍, 0💬

What Are the Oracle Built-in Data Types
What Are the Oracle Built-in Data Types? - Oracle DBA FAQ - Understanding SQL Basics There are 20 Oracle built-in data types, divided into 6 groups: Character Datatypes - CHAR, NCHAR, NVARCHAR2, VARCHAR2 Number Datatypes - NUMBER, BINARY_FLOAT, BINARY_DOUBLE Long and Row Datatypes - LONG, LONG RAW, ... 2007-04-24, 5346👍, 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, 5345👍, 0💬

How To Open a Cursor Variable
How To Open a Cursor Variable? - Oracle DBA FAQ - Working with Cursors in PL/SQL A cursor variable must be opened with a specific query statement before you can fetch data fields from its data rows. To open a cursor variable, you can use the OPEN ... FOR statement as shown in the following tutorial ... 2007-04-28, 5344👍, 0💬

How To Start an Oracle Instance
How To Start an Oracle Instance? - Oracle DBA FAQ - Creating New Database Instance Manually This is Step 6. Now you are ready to start the new Oracle Instance without any database. This instance will be used to create a database. Starting an instance without database can be done by using STARTUP NOM... 2007-04-23, 5344👍, 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, 5344👍, 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, 5343👍, 0💬

Can Group Functions Be Mixed with Non-group Selection Fields
Can Group Functions Be Mixed with Non-group Selection Fields? - Oracle DBA FAQ - Understanding SQL SELECT Query Statements If a group function is used in the SELECT clause, all other selection fields must be group level fields. Non-group fields can not be mixed with group fields in the SELECT clause... 2007-04-20, 5343👍, 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, 5339👍, 0💬

What Is a Recycle Bin
What Is a Recycle Bin? - Oracle DBA FAQ - Managing Oracle Database Tables Recycle bin is a logical storage to hold the tables that have been dropped from the database, in case it was dropped in error. Tables in recycle bin can be recovered back into database by the Flashback Drop action. Oracle data... 2007-05-04, 5338👍, 0💬

What is difference between Rename and Alias?
What is difference between Rename and Alias? Rename is actually changing the name of an object whereas Alias is giving another name (additional name) to an existing object. Rename is a permanent name given to a table or column whereas Alias is a temporary name given to a table or column which do not... 2011-12-22, 5337👍, 0💬

How To Use "startup" Command to Start Default Instance
How To Use "startup" Command to Start Default Instance? - Oracle DBA FAQ - Introduction to Oracle Database 10g Express Edition If you logged in to the server as a SYSDBA, you start the default instance with the "startup" command. Here is how to start the default instance in SQL*Plus in SYSDBA mode: ... 2007-04-24, 5329👍, 0💬

How To Do a Full Database Export
How To Do a Full Database Export? - Oracle DBA FAQ - Loading and Exporting Data If you are ready to do a full database export, you can use the FULL=y parameter on the expdp command, as shown in the following tutorial exercise: >expdp SYSTEM/fyicenter FULL=y ESTIMATE_ONLY=y Starting "SYSTEM"."SYS_EXP... 2007-05-01, 5328👍, 0💬

Can DDL Statements Be Used in PL/SQL
Can DDL Statements Be Used in PL/SQL? - Oracle DBA FAQ - Working with Database Objects in PL/SQL No, you can not run any DDL statements is PL/SQL directly. If you try to use the DROP TABLE statement inside PL/SQL, you will get a compilation error as shown below: (Connect to XE with SQL*Plus) BEGIN D... 2007-04-28, 5326👍, 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, 5324👍, 0💬

How To Define a Procedure inside Another Procedure
How To Define a Procedure inside Another Procedure? - Oracle DBA FAQ - Introduction to PL/SQL Define a procedure inside another procedure is supported by PL/SQL. The following tutorial script shows you an example: SQL> CREATE OR REPLACE PROCEDURE HR.DBA_WEEK AS 2 PROCEDURE DBA_TASK (day VARCHAR2) AS... 2007-04-26, 5322👍, 0💬

What Is NULL in PL/SQL
What Is NULL in PL/SQL? - Oracle DBA FAQ - Understanding PL/SQL Language Basics NULL is a reserved key word and it stands for two things in PL/SQL: NULL is an executable statement, and means doing nothing. NULL is a data balue, and means no value. The following sample script shows you examples of us... 2007-04-29, 5318👍, 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, 5316👍, 0💬

How To Assign a Tablespace to a Users
How To Assign a Tablespace to a Users? - Oracle DBA FAQ - Managing Oracle User Accounts, Schema and Privileges When you create a new user, Oracle will assign the SYSTEM tablespace to the user by default. If you want to change this, you can assign a different table space to a user using the ALTER USE... 2007-05-01, 5314👍, 0💬

How To Loop through Data Rows in the Implicit Curosr
How To Loop through Data Rows in the Implicit Curosr? - Oracle DBA FAQ - Working with Cursors in PL/SQL You use the FOR ... IN ... LOOP statement to loop through data rows in the implicit cursor as the following syntax: FOR row IN dml_statement LOOP (statement block with row.field) END LOOP; Here "r... 2007-04-29, 5309👍, 0💬

How To Use an Explicit Cursor without OPEN Statements
How To Use an Explicit Cursor without OPEN Statements? - Oracle DBA FAQ - Working with Cursors in PL/SQL If you want to open a cursor and loop through its data rows in quick way, you can use the FOR ... IN ... LOOP statement in the same way as the implicit cursor. The following tutorial exercise giv... 2007-04-29, 5308👍, 0💬

How To List All Indexes in Your Schema
How To List All Indexes in Your Schema? - Oracle DBA FAQ - Managing Oracle Table Indexes If you log in with your Oracle account, and you want to get a list of all indexes in your schema, you can get it through the USER_INDEXES view with a SELECT statement, as shown in the following SQL script: SELEC... 2007-05-02, 5307👍, 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