What is SQL/PLSQL?

SQL is a standard database language used to access and manipulate data in databases. SQL stands for Structured Query Language. SQL was developed by IBM Computer Scientists in the 1970s. By executing queries SQL can create, update, delete, and retrieve data in databases like MySQL, Oracle, PostgreSQL, etc. Overall SQL is a query language that communicates with databases.

PL/SQL is a combination of SQL along with the procedural features of programming languages. It was developed by Oracle Corporation in the early 90's to enhance the capabilities of SQL. PL/SQL is one of three key programming languages embedded in the Oracle Database, along with SQL itself and Java. This tutorial will give you a great understanding on PL/SQL to proceed with Oracle database and other advanced RDBMS concepts.

PL/SQL is a block-structured language that enables developers to combine the power of SQL with procedural statements. All the statements of a block are passed to Oracle engine all at once which increases processing speed and decreases the traffic. 

Prerequisites for Learning SQL:

• Basic Computer Skills: You should have a fundamental understanding of how computers, operating systems, and software work.

• Relational Database Concepts: It's helpful to have a basic understanding of relational database concepts, such as tables, rows, columns, and relationships.