What is Oracle SQL & PL/SQL? An Introduction

Oracle SQL is an important tool for database administrators. The PL/SQL language introduced with Oracle8 allows users to write their own queries and execute them against the database, making it easier than ever before to facilitate complex processes or perform tasks that are not out-of-the-box in Oracle.

Oracle SQL and PL/SQL are two different programming languages that can be used to create database queries. Oracle SQL is a procedural language, while PL/SQL is an object-oriented language.

Because SQL is so important in IT projects, all programmers should know the fundamentals of SQL. The database is the heart of the project, and SQL is the sole method to communicate with it, much as the heart is the center of the physical body. You may use this to do operations such as adding data, retrieving stored data, modifying existing data, and eliminating old data, among others. In this essay, I’ll go through what Oracle SQL and PL/SQL are in further depth.

This Oracle course is intended for both beginners and experts. Because we carefully developed the future subjects of the PL/SQL tutorial series for you, I am certain that you will grasp Oracle SQL & PL/SQL programming language with this lesson.

With more practice questions and real-life situations, you will learn everything about Oracle SQL & PL/SQL in this lesson, from the very basics to all of the complex subjects of the Oracle database in an efficient and easy method. By the conclusion of the course, you’ll have a deeper comprehension of Oracle database fundamentals and a thorough understanding of Oracle PL/SQL programming. This Oracle course is also created for you if you are searching for a career as an Oracle SQL developer, Oracle PL/SQL Developer, Data Engineer, or Database Administrator (DBA). It’s not only for those kinds of jobs; you’ll also learn all there is to know about Oracle’s relational database management system.

What exactly is a database?

A database management system (DBMS) is a set of applications for managing databases. That is, it serves as a link between the user and the database.

A database is a logically ordered collection of structured data or information kept in a computer system.

Formal design and modeling approaches are often used to create databases.

The CSV file was first used to manage information or store data in columns, which are known as fields, and rows, which are known as records. When the amount of rows in the file is raised to several millions, it is clear that people will find it impossible to handle. As a result, the relational database management system (RDBMS) was created. Fields and records are referred to as columns and rows, respectively, in a database.

Oracle is a database management system for relational databases (RDBMS). Oracle owns about half of the global RDBMS industry and is extensively utilized in corporate applications. It’s the first database built specifically for grid computing in the workplace. It handles data and applications in the most flexible and cost-effective manner possible.

There are two types of structures in Oracle Database.

Tablespaces, Schema objects, extents, and segments are all examples of logical structures.

Datafiles, Redo Log Files, and Control Files are examples of physical structures.

A table is a database object that consists of a mix of columns and rows. This saves the information to the database. The table is termed an employee table if it contains employee-related information in columns and rows such as Employee Identification Number, First and last name, Name of last name, City, and Country. The table may also be considered an entity.

Columns/Fields correspond to vertical values (Employee Id, First Name, etc.) while Rows/Records refer to horizontal values (102, Joshua, etc.).

In this comparison, the relational approach outperforms the flat file format by eliminating duplicate data.

Apart from Oracle Database, there are a few more well-known RDBMS databases on the market.

What exactly is SQL?

The acronym SQL stands for SQL (Structured Query Language) is a query, and it’s pronounced S-Q-L or See-Quell.

It’s a programming language that allows you to access, manipulate, and manage databases. All of the actions listed below may be performed in the database using SQL.

• DDL, DML, and TCL are examples of SQL queries.
• SELECT statement or command is used to retrieve data.
• Using the INSERT Statement to add entries
• Using the UPDATE statement, make changes to the entries.
• Delete items using the DELETE statement.
• To provide rights to users and database objects, use the SQL statement.
• Make a New Database
• Tables, Procedures, and Views are examples of database objects that may be created.

SQL is one of the most efficient languages for communicating with databases. SQL processes the user’s request, interacts with the database, and then provides the results. It might be anything to do with data retrieval or manipulation.

The architecture of SQL is shown in the figure below.

For a better understanding, consider the following SQL statements.

Syntax of the SELECT Statement:

SELECT * FROM ; SELECT * FROM ; SELECT * FROM ;

Syntax of the INSERT Statement:

INSERT INTO values (103,’Michel,’Jackson,’London,’United Kingdom’); INSERT INTO values (103,’Michel,’Jackson,’London,’United Kingdom’); INSERT INTO values (103,’Michel,’Jackson,’London

Syntax of a UPDATE Statement:

SET UPDATE = ‘New Jersey’ WHERE Employee CityColumn > is equal to ‘New York’;

Syntax of the DELETE Statement:

WHERE Employee CityColumn > = ‘New York’; DELETE FROM

What exactly is PL/SQL?

PL/SQL stands for Procedural Language Extensions to Oracle’s Structured Query Language, and it’s also known as block-structured language. It allows programmers to combine SQL’s functionality with procedural commands.

You could wonder why Oracle PL/SQL is required since we already have an Oracle SQL language. The explanation is that, although SQL may be used to access and alter data in a database, Oracle PL/SQL was created to overcome SQL’s restrictions.

The PL/SQL programming language is tightly linked to the SQL language. It’s a well-structured and legible language that fills in the gaps left by SQL in Oracle Database. All SQL queries may be sent to the Oracle engine at the same time, which speeds up processing and reduces bandwidth. Also included is a summary of SQL’s limitations.

• SQL was designed to exclusively conduct DDL and DML procedures, leaving no space for programmers to employ loops, iteration, or conditional checks.
• SQL queries are sent to the Oracle engine one at a time, increasing traffic and slowing down the process.
• During data processing, SQL does not provide an error checking mechanism (exceptional handling).
• When compared to PL/SQL, the performance is poor.

The architecture of Oracle PL/SQL is shown in the figure below.

Procedures, functions, packages, types, and triggers, among other PL/SQL elements, are saved in the database for reuse by applications. Except for strings and character literals, you can create PL/SQL code without worrying about case sensitivity since you can use both lower and upper case.

Anonymous block in Oracle PL/SQL Basic Syntax

BEGIN

END;

Because the block has no name and will not be kept in the database server for future use, it is referred to as an anonymous block in Oracle PL/SQL. If you ask me why there is an anonymous block in PL/SQL, I would respond that it is mostly used by programmers for testing reasons.

We have a PL/SQL block called Functions or Procedures that has its own name. This PL/SQL block will be saved on the Oracle Database server and may be used again in the future.

What is the difference between SQL and PLSQL?

Finally, SQL is a declarative language that is used to specify what data is required. PL/SQL, on the other hand, is a procedural language. It indicates what data is required as well as how it will be fetched from the database.

Oracle SQL * PL/SQL Courses to Consider

Oracle SQL & PL/SQL Book Recommendations

The information on this page was last updated at 11:13 a.m. on November 30, 2021.

Oracle SQL is a programming language that is used to create and manipulate data in an Oracle database. It is also known as PL/SQL. The “oracle sql tutorial” will give you an introduction on the Oracle SQL language.

Frequently Asked Questions

What is Oracle SQL used for?

A: Oracle SQL is a database management system written by Oracle Corporation. The two primary uses of the software are to manage relational databases and large-scale transaction processing systems. Uses outside these fields include data warehousing, master data management (MDM), OLAP, Online Analytical Processing (OLAP)

What is difference between SQL and Oracle SQL?

A: SQL is the acronym for Structured Query Language, a computer programming language that allows users to manage data stored in an organized manner. In contrast, Oracle SQL refers to Oracle Database Servers proprietary database interface which does not adhere to this standard protocol.

What is Oracles SQL called?

A: Oracle SQL is a language that queries and manipulates databases. It can also be referred to as Structured Query Language (SQL).

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