May 2020
Beginner
564 pages
14h 9m
English
Content preview from Learn SQL Database Programming
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Summary
This chapter introduced the concepts required to understand the basics of relational database management systems. It introduced you to foundational topics such as understanding SQL, what SQL can do, and its basic components. You learned that there are three subdivisions of SQL called DML, DDL, and DCL, and that the SQL language is comprised of several elements that make up a statement. We walked through a description of the relational model, what a database is, and what is in a database, including what a table, row, column, and field are.
We followed with an explanation of data integrity, including the different types of data integrity, such as entity, referential, and domain integrity, and looked at how to use keys and constraints. ...
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