What Is Difference Between SQL and PLSQL

The Dummies’ Guide To Difference Between SQL and PLSQL

” Want to understand the difference between SQL and PLSQL, you are at the right place!  You might wonder what are these kind of words? “

Here, is a detailed, yet very-easy-to-understand distinctions. (*You can also directly scroll down to the comparison table between SQL and PL/SQL ).

In the present era, technologies are rapidly changing. Along with these changes, programming languages are also evolving. 

The languages SQL, PL/SQL, and MongoDB are the languages that mainly focused on when it comes to handling databases. 

These languages hold tremendous value in the market. So in this article, I will throw some light on the difference between Sql and PLSql to help you choose your career as a back-end developer or get a certification accordingly

  • The critical difference between two languages SQL and PL/SQL is that SQL executes a single query at the time, whereas Pl/SQL executes the code’s block at once
  • SQL is a Structured Query Language; PL/SQL is a Procedural Structured Query Language.  
  • SQL stands for a structured query language that can add, delete, modify, or manipulate the data in the database. Moreover, PL/SQL stands for Procedural language, an extension of SQL, and it holds the SQL statements within its syntax.  

SQL We are going to cover the following points in this article: 

  • Introduction to SQL
  • Definition of SQL
  • Advantages of SQL
  • Disadvantages of SQL
  • Application of SQL  

Introduction to SQL: 

  • SQL (Structured Query Language) is a standard Database language used to create, maintain, and retrieve the relational database.   
  • In SQL, we write queries or command using Data Definition Language, Data Manipulative Language statements. 

Definition of SQL:

  • IBM developed SQL in the year 1970. It is an established relational language for the database. 
  • It defines a set of relations in the database using data definition language (DDL). Data definition language is used to create every relation’s schema and maintain their integrity constraints, security issues, and authorization of each particular relations.
  • There is another part of SQL that is Data Manipulation Language (DML). Data Manipulation Language enables users to access the database or manipulate it.  
  • Data Manipulation Language is usually categorized into two types Procedural DML and non-procedural DML or Declarative DML.
  • Procedural DML statements are the statements that specify what data is required and also how to retrieve that data. Whereas on the other hand, a Non-procedural DML statement only determines what data is needed. The SQL uses Declarative DMLs. 
  • SQL is easily embedded in the syntax of many languages like C, C++, Java, PHP, Perl, Python, etc. It is a data-oriented declarative language.

Advantages of SQL: 

  • SQL Queries are used to retrieve a considerable amount of records from a database quickly and efficiently. 
  • In standard SQL, the management of the database system is very easy. A substantial amount of code is not required to manage the database system. 
  • It is established that is used by the SQL databases that are being used by ISO and ANSI
  • SQL is very portable as it can be used in PCs, laptops, servers, and some smartphones. 
  • It is used in communication with the database as it is a domain language. It is also used to retrieve solutions to complex queries in seconds. 
  • Using the SQL language, the users can make multiple views of the database structure.   

Disadvantages of SQL : 

  • Complex Interface –  It has a complex and challenging interface that makes few users uncomfortable while operating on the database. 
  • Cost –  Few versions of SQL are costly. 
  • Partial Control – Complete Control is not given to the database as it has hidden business rules.

Applications of SQL : 

  • SQL is used by DBAs (Database Administrators) and developers in writing Data Integration Scripts.
  • SQL is used to deal with analytical queries to analyze the data and get instincts from it. 
  • Retrieving Information
  • Modification of data and manipulation of data in a database table such as Insertion, Deletion, and Updation.   


We are going to cover the following points in this article: 

  •  Introduction to PL/SQL 
  •  Definition of PL/SQL 
  •  Advantages of PL/SQL
  •  Disadvantages of PL/SQL

● Introduction to PL/SQL:

  • PL/SQL is a block-structured language that allows the developers to use the procedural statements with SQL’s power.
  • PL/SQL was developed by Oracle Corporation within the early ’90s to speed up SQL capabilities. It stands for Procedural Language extensions to Structured Query Language. 
  • All the block statements are passed to the oracle engine at once, which increases processing speed and decreases traffic.
  • PL/SQL is a database-oriented programming language with procedural capabilities that extends SQL.
  • It adds selective (i.e., if then else ) and iterative constructs (i.e., loops) to SQL. It helps in keep procedures and putting in writing triggers.   

● Definition of PL/SQL:

PL/SQL is developed by  Oracle Corporation and is a procedural relational database language developed in the early ’90s. Oracle uses PL/SQL along with JAVA and SQL. 

PL/SQL is an extension of Structured Query Language, and it embeds the SQL statements within its syntax.

It allows the execution of multiple statements at a time, which increases its performance. The block of code may consist of function, procedures, variables packages, triggers, loops.

PL/SQL is designed to build server pages and web applications. 

It inhibits features like data hiding, encapsulation, object-oriented data type, and exception handling.  

Advantages of PL/SQL

  • It consists of a block structure made of blocks of code, which can be easily nested within each other. Each block is a logical module or a unit of a task. These blocks are often kept within the info and reused. 
  • It consists of procedural language constructs like loops like (FOR loops) and conditional statements (if-else statements). 
  • PL/SQL engine processes multiple SQL statements in a block form simultaneously, which in turn reduces the network traffic and gives better performance. 
  • PL/SQL handles exceptions or errors very effectively throughout the execution of a PL/SQL program.  When the associate degree exception is caught, required actions can be taken depending upon the type of the exception or displayed with a message to the user.
  •  Applications written in PL/SQL are entirely portable. 
  •  PL/SQL provides a high-security level. 
  •  PL/SQL provides access to predefined SQL packages. 

Disadvantages of PL/SQL  

Proprietary to Oracle – 

  • PL/SQL is proprietary to Oracle, which means if you were to change database vendors, then you would have to re-write all your Oracle PL/SQL programs.
  • Also, use a mixture of databases or develop applications to run on different databases. You will either have to support lots of source code or write your applications in a database-neutral language like Java, VB or C and use the APIs to access the database.

Low I/O Features – 

  • The other limitation of Oracle PL/SQL is that there is very little support for I/O either to read/write files or either reading from or writing to a user interface. 
  • The reason behind this is that PLSQL is designed for manipulation of information from the database and not for communicating with users or processing files. These operations are possible, but they require more effort.

Main Key Difference Between SQL And PLSQL

difference between SQL and PLSQL

Conclusion (The Complete Guide To Difference Between Sql and Plsql)

  • Here we discussed everything about the difference between SQL and PLSQL. Hope you liked this article.
  • We will be back with another great article that would prove an add to your technical knowledge.

Thanks for reading…

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