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PL/SQL Inherits Database Robustness, Security, and Portability

PL/SQL is a procedural language designed specifically to embrace SQL statements within its syntax. PL/SQL program units are compiled by the Oracle Database server and stored inside the database. And at run-time, both PL/SQL and SQL run within the same server process, bringing optimal efficiency. PL/SQL automatically inherits the robustness, security, and portability of the Oracle Database. Try a PL/SQL Workout!

Why Use PL/SQL?

An application that uses Oracle Database is worthless unless only correct and complete data is persisted. The time-honored way to ensure this is to expose the database only via an interface that hides the implementation details—the tables and the SQL statements that operate on these. This approach is generally called the smart database or SmartDB paradigm, because PL/SQL subprograms inside the database issue the SQL statements from code that implements the surrounding business logic; and because the data can be changed and viewed only through a PL/SQL interface.

Building with Blocks : PL/SQL is a block-structured language; familiarity with blocks is critical to writing good code.

Controlling the Flow of Execution : Conditional branching and iterative processing in PL/SQL

Wrap Your Code in a Neat Package : Packages are the fundamental building blocks of any high quality PL/SQL-based application

Picking Your Packages : Concepts and benefits of PL/SQL packages

Error Management : An exploration of error management features in PL/SQL

The Data Dictionary: Make Views Work for You : Use several key data dictionary views to analyze and manage your code

Working with Strings in PL/SQL : PL/SQL offers several different string datatypes for use in your applications

Working with Numbers in PL/SQL : Learn about and how to use the different numeric types in PL/SQL.

Working with Dates in PL/SQL Dates are a relatively complex scalar datatype, in both SQL and PL/SQL

Working with Records : A very common and useful composite type, PL/SQL’s analogue to a table’s row

Error Management : PL/SQL’s implementation of arrays plays a role in almost every key performance feature of PL/SQL

Working with Collections : Use several key data dictionary views to analyze and manage your code

Working with Cursors : PL/SQL cursors make it easy for you to manipulate the contents of database tables

Bulk Processing with BULK COLLECT and FORALL : The most important performance feature in PL/SQL related to executing SQL

Practically Perfect PL/SQL (P3) offers videos on PL/SQL by Steven Feuerstein, Oracle Developer Advocate for PL/SQL and author of Oracle PL/SQL Programming .

Getting Rid of Hard-Coding in PL/SQL
This first playlist of P3 explores the various forms of hard-coding that can appear in PL/SQL, and how best to get rid of them.

What is Hard-Coding?

The Psychology Behind Hard-Coding

Get rid of those hard-coded literals!

Every VARCHAR2(N) Declaration a Bug!?

Hide Those Business Rules and Formulas!

Oracle Database 18c:
Database PL/SQL Language Reference ,
PL/SQL Packages and Types Reference

Oracle Database 12c Release 2:
PL/SQL Language Reference ,
PL/SQL Packages and Types Reference

Oracle Database 12c Release 1:
PL/SQL Language Reference ,
PL/SQL Packages and Types Reference

Oracle Database 11g Release 2:
PL/SQL Language Reference ,
PL/SQL Packages and Types Reference

Presentation: Doing PL/SQL from SQL: Correctness and Performance (PDF)

Presentation: New PL/SQL Capabilities in Oracle Database 12c (PDF)

SmartDB Resource Center