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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, 5118👍, 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, 5118👍, 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, 5116👍, 0💬

How To Call a Stored Function with Parameters
How To Call a Stored Function with Parameters? - Oracle DBA FAQ - Creating Your Own PL/SQL Procedures and Functions You can define a function that takes parameters, provide values to those parameters when calling the function. Here is a good example of a function with a parameter: SQL> CREATE OR REP... 2007-04-25, 5115👍, 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, 5114👍, 0💬

How To Define a Cursor Variable
How To Define a Cursor Variable? - Oracle DBA FAQ - Working with Cursors in PL/SQL To define cursor variable, you must decide which REF CURSOR data type to use. There are 3 ways to select a REF CURSOR data type: Define your own specific REF CURSOR types using the TYPE ... RETURN statement. Define yo... 2007-04-28, 5113👍, 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, 5110👍, 0💬

How To Insert a Record into a Table
How To Insert a Record into a Table? - 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 insert a row to this table with this RECORD variable using the INSERT statement as shown in the example below: CREATE TAB... 2007-04-26, 5110👍, 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, 5089👍, 0💬

How To Define a Data Field as NOT NULL
How To Define a Data Field as NOT NULL? - Oracle DBA FAQ - Working with Database Objects in PL/SQL When defining a specific RECORD type, you can define a data field as NOT NULL to make sure variables with this RECORD type to always have values in this field. A field defined as NOT NULL must have a d... 2007-04-27, 5087👍, 0💬

How To Assign Data of the Deleted Row to Variables
How To Assign Data of the Deleted Row to Variables? - Oracle DBA FAQ - Working with Database Objects in PL/SQL If a DELETE statement is deleting a single row, you can assign column values of the deleted row to variables by using the RETURNING clause, which an extension of DELETE statements for PL/SQ... 2007-04-27, 5071👍, 0💬

How To Use Attributes of the Implicit Cursor
How To Use Attributes of the Implicit Cursor? - Oracle DBA FAQ - Working with Cursors in PL/SQL Right after executing a DML statement, you retrieve any attribute of the implicit cursor by using SQL%attribute_name, as shown in the following tutorial exercise: CREATE TABLE student (id NUMBER(5) PRIMAR... 2007-04-29, 5056👍, 0💬

How To Retrieve Data from an Cursor to a RECORD
How To Retrieve Data from an Cursor to a RECORD? - Oracle DBA FAQ - Working with Cursors in PL/SQL If you have a cursor opened ready to use, you can also use the FETCH statement to retrieve data from the cursor into a RECORD variable as shown in the tutorial exercise below: CREATE OR REPLACE PROCEDU... 2007-04-29, 5052👍, 0💬

How To Use FETCH Statement in a Loop
How To Use FETCH Statement in a Loop? - Oracle DBA FAQ - Working with Cursors in PL/SQL If you have a cursor opened ready to use, you can also use the FETCH statement in a loop to retrieve data from the cursor more efficiently. But you need to remember to use an EXIT statement break the loop when th... 2007-04-29, 5045👍, 0💬

How To Define an Explicit Cursor
How To Define an Explicit Cursor? - Oracle DBA FAQ - Working with Cursors in PL/SQL An explicit cursor must be defined in the declaration part of a procedure or function with the CURSOR ... IS statement as shown in the following sample script: DECLARE CURSOR c_list IS SELECT * FROM countries; CURSOR... 2007-04-29, 5037👍, 0💬

How To Create a Stored Program Unit
How To Create a Stored Program Unit? - Oracle DBA FAQ - Introduction to PL/SQL If you want to create a stored program unit, you can use the CREATE PROCEDURE or FUNTION statement. The example script below creates a stored program unit: SQL> set serveroutput on; SQL> CREATE PROCEDURE Hello AS 2 BEGIN ... 2007-04-25, 5026👍, 0💬

How To Define a Specific RECORD Type
How To Define a Specific RECORD Type? - Oracle DBA FAQ - Working with Database Objects in PL/SQL If you want to define a specific RECORD type, you need to use the TYPE ... IS RECORD statement in the declaration part of any procedure or function. The following example script defines a RECORD type cal... 2007-04-27, 5022👍, 0💬

What Is PL/SQL
What Is PL/SQL? - Oracle DBA FAQ - Introduction to PL/SQL PL/SQL is a modern, block-structured programming language. It provides several features that make developing powerful database applications very convenient. For example, PL/SQL provides procedural constructs, such as loops and conditional sta... 2007-04-25, 5009👍, 0💬

How Many Anonymous Blocks Can Be Defined
How Many Anonymous Blocks Can Be Defined? - Oracle DBA FAQ - Introduction to PL/SQL An anonymous block is stored in the user's current session without any name. So you can only define one anonymous block at any time. If you define another anonymous block, the new block will replace the previously de... 2007-04-25, 5004👍, 0💬

What Is the Implicit Cursor
What Is the Implicit Cursor? - Oracle DBA FAQ - Working with Cursors in PL/SQL There is only one implicitly cursor in a session. 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... 2007-04-29, 4985👍, 0💬

Can Variables Be Used in SQL Statements
Can Variables Be Used in SQL Statements? - Oracle DBA FAQ - Working with Database Objects in PL/SQL Yes, you can use variables in SQL statements as part of any expressions. The tutorial script provides you some good examples: (Connect to XE with SQL*Plus) CREATE TABLE student (id NUMBER(5) PRIMARY K... 2007-04-28, 4984👍, 0💬

How To Use SQL Statements in PL/SQL
How To Use SQL Statements in PL/SQL? - Oracle DBA FAQ - Introduction to PL/SQL SQL DML (Data Manipulation Language) statements can be included in PL/SQL code blocks directly without any changes. See the script below for examples: SQL> CREATE TABLE tip (id NUMBER(5) PRIMARY KEY, 2 subject VARCHAR(80)... 2007-04-25, 4979👍, 0💬

How To Define a Variable to Match a Table Column Data Type
How To Define a Variable to Match a Table Column Data Type? - Oracle DBA FAQ - Working with Database Objects in PL/SQL If you have a table, and want to define some variables to have exactly the same data types as some columns in that table, you can use table_name.column_name%TYPE as data types to de... 2007-04-26, 4970👍, 0💬

What Are the Types PL/SQL Code Blocks
What Are the Types PL/SQL Code Blocks? - Oracle DBA FAQ - Introduction to PL/SQL There are 3 types of PL/SQL code blocks: Anonymous Block - A block of codes with no name. It may contain a declaration part, an execution part, and exception handlers. Stored Program Unit - A block of codes with a name.... 2007-04-25, 4963👍, 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