Reserved keywords in Oracle

Oracle official documentation Description: ReservedwordsandkeywordsareidentifiersthathavespecialmeaninginPLSQL. Youcannotuserese

Oracle official documentation Description: Reserved words and keywordsare identifiers that have special meaning in PL/SQL. You cannot use rese

Oracle official documentation:

Reserved words and keywordsare identifiers that have special meaning in PL/SQL.

You cannot use reserved words as ordinary user-defined identifiers. you can use them as quoted user-defined identifiers, but it is not recommended. for more information, see "QuotedUser-Defined Identifiers ".

You can use keywords as ordinary user-defined identifiers, but it is not recommended.

Reserved Words cannot be used as User-Defined variables. However, you can add double quotation marks, but do not store them.

Keywords can be used as User-Defined variables without being pushed.

For example:

(1) Reserved Words

-- Number

Create a table as the field name.

SQL> CREATE TABLE cux_oyj_RESERVED_WORDS (NUMBER );

Create table cux_oyj_RESERVED_WORDS (NUMBER)

ORA-00904: The identifier is invalid.

You can add double quotation marks

SQL> CREATE TABLE cux_oyj_RESERVED_WORDS ("NUMBER" NUMBER );

Table created

But query:

SQL> SELECT rw. number from cux_oyj_RESERVED_WORDS rw;

SELECT rw. number from cux_oyj_RESERVED_WORDS rw

ORA-01747: user. table. column, table. column or column description invalid

It is troublesome to use.

(2) KEYWORDS

-- Name

Create a table as the field name.

SQL> CREATE TABLE cux_oyj_KEYWORDS (NAME VARCHAR2 (50 ));

Table created

View of Reserved Words and keywords (Dynamic View) V $ RESERVED_WORDS

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

ColumnDatatypeDescription

KEYWORDVARCHAR2 (30) Name of the keyword

LENGTHNUMBERLength of the keyword

RESERVEDVARCHAR2 (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_TYPEVARCHAR2 (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_ATTRVARCHAR2 (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_SEMIVARCHAR2 (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.

DUPLICATEVARCHAR2 (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.

Reserved Words:

Begins with: Reserved Words

A

ALL, ALTER, AND, ANY, AS, ASC,

B

BEGIN, BETWEEN,

C

CASE, CHECK, CLUSTERS, CLUSTER, COLAUTH, COLUMNS, COMPRESS, CONNECT, CRASH, CREATE, CURSOR

D

DECLARE, DEFAULT, DESC, DISTINCT, DROP

E

ELSE, END, EXCEPTION, EXCLUSIVE

F

FETCH, FOR, FROM, FUNCTION

G

GOTO, GRANT, GROUP

H

HAVING

I

IDENTIFIED, IF, IN, INDEX, INDEXES, INSERT, INTERSECT, INTO, IS

L

LIKE, LOCK

M

MINUS, MODE

N

NOCOMPRESS, NOT, NOWAIT, NULL

O

OF, ON, OPTION, OR, ORDER, OVERLAPS

P

PROCEDURE, PUBLIC

R

RESOURCE, REVOKE

S

SELECT, SHARE, SIZE, SQL, START, SUBTYPE

T

TABAUTH, TABLE, THEN, TO, TYPE

U

UNION, UNIQUE, UPDATE

V

VALUES, VIEW, VIEWS

W

WHEN, WHERE,

Keywords:

Begins with: Keywords

A

A, ADD, AGENT, AGGREGATE, ARRAY, ATTRIBUTE, AUTHID, AVG

B

BFILE_BASE, BINARY, BLOB_BASE, BLOCK, BODY, BOTH, BOUND, BULK, BYTE

C

C, CALL, CALLING, CASCADE, CHAR, CHAR_BASE, CHARACTER, CHARSET, CHARSETFORM, CHARSETID, CLOB_BASE, CLOSE, COLLECT, COMMENT, COMMIT, COMMITTED, COMPILED, CONSTANT, CONSTRUCTOR, CONTEXT, CONTINUE, CONVERT, COUNT, CURRENT, CUSTOMDATUM

D

DANGLING, DATA, DATE, DATE_BASE, DAY, DEFINE, DELETE, DETERMINISTIC, DOUBLE, DURATION

E

ELEMENT, ELSIF, EMPTY, ESCAPE, escape t, EXCEPTIONS, EXECUTE, EXISTS, EXIT, EXTERNAL

F

FINAL, FIXED, FLOAT, FORALL, FORCE

G

GENERAL

H

HASH, HEAP, HIDDEN, HOUR

I

IMMEDIATE, INCLUDING, INDICATOR, INDICES, INFINITE, INSTANTIABLE, INT, INTERFACE, INTERVAL, INVALIDATE, ISOLATION

J

JAVA

L

LANGUAGE, LARGE, LEADING, LENGTH, LEVEL, LIBRARY, LIKE2, LIKE4, LIKEC, LIMIT, LIMITED, LOCAL, LONG, LOOP

M

MAP, MAX, MAXLEN, MEMBER, MERGE, MIN, MINUTE, MOD, MODIFY, MONTH, MULTISET

N

NAME, NAN, NATIONAL, NATIVE, NCHAR, NEW, NOCOPY, NUMBER_BASE

O

OBJECT, OCICOLL, OCIDATE, OCIDATETIME, OCIDURATION, OCIINTERVAL, interval, OCINUMBER, OCIRAW, OCIREF, region, OCIROWID, OCISTRING, OCITYPE, OLD, ONLY, OPAQUE, OPEN, OPERATOR, ORACLE, ORADATA, ORGANIZATION, ORLANY, ORLVARY, OTHERS, OUT, OVERRIDING

P

PACKAGE, PARALLEL_ENABLE, PARAMETER, PARAMETERS, PARENT, PARTITION, PASCAL, PIPE, PIPELINED, PRAGMA, PRECISION, PRIOR, PRIVATE

R

RAISE, RANGE, RAW, READ, RECORD, REF, REFERENCE, RELIES_ON, REM, REMAINDER, RENAME, RESULT, RESULT_CACHE, RETURN, RETURNING, REVERSE, ROLLBACK, ROW

S