Oracle Database PL/SQL Language Reference, 11g Release 2 () . PL/SQL Feature for Oracle Database 11g Release 2 (). Optimize PL/SQL performance with tools and techniques such as PL/Scope and the PL/SQL hierarchical profiler. Explore datatypes, conditional and sequential. Nutshell Handbook, the Nutshell Handbook logo, and the O'Reilly logo are registered trademarks of O'Reilly. Media, Inc. Oracle PL/SQL Programing, the image.
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Oracle PL/SQL by example / Benjamin Rosenzweig, Elena Silvestrova Rakhimov . p. cm. ISBN (pbk.: alk. paper) 1. PL/SQL (Computer program. Oracle SQL & PL/SQL Optimization for. Developers Note: You can automatically generate documentation (HTML, PDF, CHM,) from the. the heart of much of Oracle's software is PL/SQL—a programming language that PL/SQL is integrated tightly into Oracle's SQL language: you can execute.
The procedure begins with a mandatory heading part to hold the procedure name and optionally the procedure parameter list. The standalone or package procedures, stored in the database, are referred to as " stored procedures ".
An IN parameter is used as input only. An IN parameter is passed by reference, though it can be changed by the inactive program. The program assigns the parameter value and that value is returned to the calling program. That initial value may or may not be modified by the called program.
Any changes made to the parameter are returned to the calling program by default by copying but - with the NOCOPY hint - may be passed by reference. The use of packages promotes re-use of code.
Packages are composed of the package specification and an optional package body.
Create a PDF file from Oracle PL/SQL
The specification is the interface to the application; it declares the types, variables, constants, exceptions, cursors, and subprograms available. The body fully defines cursors and subprograms, and so implements the specification.
They support object-oriented programming features like function overloading and encapsulation. Always we have to ensure that bal not less than 1k 3.
Oracle PL SQL Interview Questions
Keep Track, who has modified the sal of emp 4. Sending mail 5.
Reading from files and writing to files 6. Hiding some rows or some imp col info[VPD] virtual private database 7. Executing shell scripts from oracle 8. Datatypes: -- data types are of four types 1.
Faculty: Mr. Conditional 2. Iterative Control Structures or loops Conditional Control Structures: Using a particular condition controling the number of executions is possible using conditional control structures. Loops are used to execute a single statement for 'N' number of times. There are 3 types of loops: 1. While loop 3.
For loop or Numeric loop. Syntax: for loopcounter in lowerbound.. Cursor Types: 1. Note: implicit cursors always stores the attributes of the recently executed Ex1: begin delete from emp; sql statement. Explicit cursors are always defined only on 'select' queries and the select query may refere any no.
If the query retrieves 0 Explicit Cursors 1. The use of packages promotes re-use of code.
Packages are composed of the package specification and an optional package body. The specification is the interface to the application; it declares the types, variables, constants, exceptions, cursors, and subprograms available. The body fully defines cursors and subprograms, and so implements the specification. They support object-oriented programming features like function overloading and encapsulation.
Using package variables one can declare session level scoped variables since variables declared in the package specification have a session scope. Main article: Database trigger A database trigger is like a stored procedure that Oracle Database invokes automatically whenever a specified event occurs. Unlike a stored procedure, you can enable and disable a trigger, but you cannot explicitly invoke it.
While a trigger is enabled, the database automatically invokes it—that is, the trigger fires—whenever its triggering event occurs.
While a trigger is disabled, it does not fire. You specify the triggering event in terms of triggering statements, and the item they act on.
The trigger is said to be created on or defined on the item—which is either a table, a view, a schema, or the database.Not necessarily; however, since the beauty of a PDF created from your Oracle database is having non-editable point-in-time documentation of the data of interest, the work necessary to create and store the PDF could be well worth the investment. Log in and logout time of a user Faculty: Mr.
You can connect to any target Oracle database schema by using standard Oracle database authentication. Another difference is that the procedure can return multiple values whereas a function should only return a single value. While loop 3. Oracle technology is changing and we strive to update our BC Oracle support information.
Oracle PL/SQL Language
Many Oracle applications' reports are already being converted to an XML friendly format. Iterative Control Structures or loops Conditional Control Structures: Using a particular condition controling the number of executions is possible using conditional control structures. The block is not stored in the database, and for that reason, it is called an anonymous block even if it has a label.
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