What is the difference between SQL and PL/SQL?

SQL

PL/SQL

SQL is a database structured query language used to communicate with relational databases. It was developed by IBM Corporations and first appeared in 1974.

PL/SQL or Procedural Language/Structured Query Language is a dialect of SQL used to enhance the capabilities of SQL. Oracle Corporation developed it in the early 90's. It uses SQL as its database language.

SQL is a declarative and data-oriented language.

PL/SQL is a procedural and application-oriented language.

SQL has no variables.

PL/SQL can use variables constraints and data types.

SQL can execute only a single query at a time.

PL/SQL can execute a whole block of code at once.

SQL query can be embedded in PL/SQL.

PL/SQL cannot be embedded in SQL as SQL does not support any programming language and keywords.

SQL can directly interact with the database server.

PL/SQL cannot directly interact with the database server.

SQL is like the source of data that we need to display.

PL/SQL provides a platform where SQL data will be shown.