Keyword

The database system uses a number of words as keywords, for example as syntax elements in SQL statements or as command names.

There are reserved and non-reserved keywords.

?     You can use reserved keywords in special identifiers for database objects, but not in simple identifiers.

Example: SELECT

?     You can use non-reserved keywords in any identifiers for database objects.

Example: COMMIT

We recommend that you use neither non-reserved nor reserved keywords in identifiers for database objects.

See also:

SQL Reference Manual, Keyword (key_word)