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What Is SQL?
S
tructured
Q
uery
L
anguage
A standard interactive and programming language for getting information from and updating a
relational database
.
A relational database is composed of
tables
of data composed of typed
columns
.
A
row
in a table is an n-tuple of data, for example:
<pet_name, owner, species, sex, birth_date, death_date>
The collection of rows in a table constitutes a
relation
.
Queries take the form of a command language that lets you select, insert, and update data in a table.
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