V$RESERVED_WORDS

This view gives a list of all SQL keywords. To determine whether a particular keyword is reserved in any way, check the RESERVED, RES_TYPE, RES_ATTR, and RES_SEMI columns.

Column	Datatype	Description
`KEYWORD`	`VARCHAR2(30)`	Name of the keyword
`LENGTH`	`NUMBER`	Length of the keyword
`RESERVED`	`VARCHAR2(1)`	A value of Y means that the keyword cannot be used as an identifier. A value of N means that it is not reserved.
`RES_TYPE`	`VARCHAR2(1)`	A value of Y means that the keyword cannot be used as a type name. A value of N means that it is not reserved.
`RES_ATTR`	`VARCHAR2(1)`	A value of Y means that the keyword cannot be used as an attribute name. A value of N means that it is not reserved.
`RES_SEMI`	`VARCHAR2(1)`	A value of Y means that the keyword is not allowed as an identifier in certain situations, such as in DML. A value of N means that it is not reserved.
`DUPLICATE`	`VARCHAR2(1)`	A value of Y means that the keyword is a duplicate of another keyword. A value of N means that it is not a duplicate.