May 2020
Beginner
564 pages
14h 9m
English
Content preview from Learn SQL Database Programming
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Understanding SQL
Structured Query Language, or SQL (pronounced see-quel), is the language that is used for querying and manipulating data and defining structures in databases. Initially developed at IBM in the early 1970s, SQL became an ANSI and ISO standard in 1986.
SQL is a powerful, yet simple language, and can do many things, such as execute queries, retrieve, insert, update, and delete data, create databases and tables, and much more.
These types of activities can be grouped into different subdivisions of SQL: Data Definition Language (DDL), Data Manipulation Language (DML), and Data Control Language (DCL):
- Use DDL commands to specify database schema:
- CREATE: This is used to create a new database or objects in a database.
- ALTER
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