What is PL/SQL? - Procedural Language Extension to the SQL

Learn the basics of PL/SQL, it is Procedural Language Extension to the SQL and Oracle Relational Database, Developed by Oracle Corporation, PL/SQL is available in Oracle Database.
Written by Paayi Knowledge |01-Aug-2020 | 0 Comments | 53 Views

PL/SQL means "Procedural Language extensions to the Structured Query Language." SQL is a well-known language for both querying and updating data in the relational database management systems (RDBMS). PL/SQL adds numerous procedural constructs to SQL language to conquer a few impediments of SQL. Plus, PL/SQL gives a progressively extensive programming language solution for building crucial applications on Oracle Databases.

PL/SQL is a profoundly structured and meaningful language. It constructs to express the expectation of the code obviously. Additionally, PL/SQL is a simple language to learn.

PL/SQL is a standard and portable language for Oracle Database improvement. You can rapidly move it to another good Oracle Database with no changes if you build up a program that executes on an Oracle Database.

PL/SQL is an embedded language. PL/SQL can execute in an Oracle Database. It was not intended to use as an independent language like Java, C#, and C++. You cant build up a PL/SQL program that runs on a system that doesn't have an Oracle Database.

PL/SQL is a high performance and profoundly integrated database language. Besides PL/SQL, you can utilize other programming languages, for example, Java, C#, and C++. Be that as it may, it is simpler to compose productive code in PL/SQL than other programming languages with regards to connecting with the Oracle Database. Specifically, you can utilize PL/SQL explicitly constructs like the FORALL statement that improves database execution.


PL/SQL Architecture

PL/SQL engine is responsible for compiling PL/SQL code into byte-code and executes the executable code. The PL/SQL engine must be installed in an Oracle Database server or an application advancement tool, for example, Oracle Forms.

When you submit a PL/SQL block to the Oracle Database server, the PL/SQL engine works together with the SQL engine to compile and execute the code. PL/SQL engine runs the procedural elements and on the other hand, the SQL engine processes the SQL statements. 

Presently you ought to have an essential comprehension of PL/SQL programming language and its architecture.

Prophet PL/SQL is an extension of SQL language that joins the information control intensity of SQL with the preparation intensity of procedural language to make too incredible SQL questions. PL/SQL implies teaching the compiler what to do through SQL and how to do it through its procedural way. 

PL/SQL is intended for the constant preparation of SQL explanations upgrading the security, movability, and heartiness of the database. Like other database languages, it gives more control to the developers by utilizing circles, conditions, and object-oriented language. The full type of PL/SQL is "Procedural Language augmentations to SQL.


PL/SQL Block:

# This is the segment that has the genuine PL/SQL code.

# This comprises of various areas to isolate the code sensibly (revelatory segment for announcing reason, execution segment for preparing proclamations, exemption dealing with a segment for taking care of errors)

# It likewise contains the SQL guidance that used to associate with the database server.

# All the PL/SQL units are treated as PL/SQL blocks, and this is the beginning phase of the engineering, which fills in as the essential info.


Following is the diverse kind of PL/SQL units.

Mysterious Block




Bundle Body

Bundle Specification



Type Body


PL/SQL Engine

# PL/SQL engine is where the genuine handling of the codes happens.

# PL/SQL engine isolates PL/SQL units and SQL part in the contribution (as appeared in the picture beneath).

# The isolated PL/SQL units will be taken care of by the PL/SQL engine itself.

# The SQL part will be sent to the database server where the real cooperation with the database happens.

# It tends to be introduced in both the database server and in the application server.


Database Server:

# This is the most significant part of the Pl/SQL unit, which stores the information.

# The PL/SQL engine uses the SQL from PL/SQL units to collaborate with the database server.

It comprises of SQL agent, which parses the information SQL articulations and execute the equivalent.


Advantage of Using PL/SQL

# Better execution, as SQL is executed in mass instead of a solitary articulation

# High Productivity

# Tight mix with SQL

# Full Portability

# Tight Security

# Support Object-Oriented Programming languages.


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