Each SQL statement contains one or more keywords. SQL is not case sensitive to keywords, but throughout these manuals, keywords are indicated in upper case.
For example, in the following statement, SELECT and FROM are keywords:
SELECT * FROM employee
The following statements are equivalent to the one above:
Select * From employee select * from employee sELECT * FRoM employee
Some keywords cannot be used as identifiers without surrounding them in double quotes. These are called reserved words.
