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>保留关键字 创建者：webmaster 更新时间：2006-02-16 15:51Microsoft® SQL Server™ 2000 使用保留关键字定义、操作和访问数据库。保留关键字是 SQL Server 使用的 Transact-SQL 语言语法的一部分，用于分析和理解 Transact-SQL 语句和批处理。尽管在 Transact-SQL 脚本中，使用 SQL Server 保留关键字作为标识符和对象名在语法上是可行的，但规定只能使用分隔标识符。
下表列出了 SQL Server 的保留关键字。
ADD EXCEPT PERCENT ALL EXEC PLAN ALTER EXECUTE PRECISION AND EXISTS PRIMARY ANY EXIT PRINT AS FETCH PROC ASC FILE PROCEDURE AUTHORIZATION FILLFACTOR PUBLIC BACKUP FOR RAISERROR BEGIN FOREIGN READ BETWEEN FREETEXT READTEXT BREAK FREETEXTTABLE RECONFIGURE BROWSE FROM REFERENCES BULK FULL REPLICATION BY FUNCTION RESTORE CASCADE GOTO RESTRICT CASE GRANT RETURN CHECK GROUP REVOKE CHECKPOINT HAVING RIGHT CLOSE HOLDLOCK ROLLBACK CLUSTERED IDENTITY ROWCOUNT COALESCE IDENTITY_INSERT ROWGUIDCOL COLLATE IDENTITYCOL RULE COLUMN IF SAVE COMMIT IN SCHEMA COMPUTE INDEX SELECT CONSTRAINT INNER SESSION_USER CONTAINS INSERT SET CONTAINSTABLE INTERSECT SETUSER CONTINUE INTO SHUTDOWN CONVERT IS SOME CREATE JOIN STATISTICS CROSS KEY SYSTEM_USER CURRENT KILL TABLE CURRENT_DATE LEFT TEXTSIZE CURRENT_TIME LIKE THEN CURRENT_TIMESTAMP LINENO TO CURRENT_USER LOAD TOP CURSOR NATIONAL TRAN DATABASE NOCHECK TRANSACTION DBCC NONCLUSTERED TRIGGER DEALLOCATE NOT TRUNCATE DECLARE NULL TSEQUAL DEFAULT NULLIF UNION DELETE OF UNIQUE DENY OFF UPDATE DESC OFFSETS UPDATETEXT DISK ON USE DISTINCT OPEN USER DISTRIBUTED OPENDATASOURCE VALUES DOUBLE OPENQUERY VARYING DROP OPENROWSET VIEW DUMMY OPENXML WAITFOR DUMP OPTION WHEN ELSE OR WHERE END ORDER WHILE ERRLVL OUTER WITH ESCAPE OVER WRITETEXT 另外，SQL-92 标准还定义了保留关键字列表。不要使用 SQL-92 保留关键字作为对象名和标识符。ODBC 保留关键字列表（如下所示）与 SQL-92 保留关键字列表相同。
说明 SQL-92 保留关键字列表有时可能比 SQL Server 限制更多，有时则限制更少。例如，SQL-92 保留关键字列表包含 INT，而 SQL Server 不需要将其区分为保留关键字。
Transact-SQL 保留关键字可用作数据库或数据库对象（如表、列、视图等）的标识符或名称。使用被引用的标识符或分隔标识符。对将保留关键字用作变量和存储过程参数的名称没有限制。有关更多信息，请参见使用标识符。
ODBC 保留关键字
保留了下列关键字用于 ODBC 函数调用。这些关键字根本不约束 SQL 语法；然而，为确保与支持核心 SQL 语法的驱动程序兼容，应用程序应避免使用这些关键字。
下面是当前的 ODBC 保留关键字列表。有关更多信息，请参见《Microsoft ODBC 3.0 程序员参考》，第 2 卷，附录 C。
ABSOLUTE EXEC OVERLAPS ACTION EXECUTE PAD ADA EXISTS PARTIAL ADD EXTERNAL PASCAL ALL EXTRACT POSITION ALLOCATE FALSE PRECISION ALTER FETCH PREPARE AND FIRST PRESERVE ANY FLOAT PRIMARY ARE FOR PRIOR AS FOREIGN PRIVILEGES ASC FORTRAN PROCEDURE ASSERTION FOUND PUBLIC AT FROM READ AUTHORIZATION FULL REAL AVG GET REFERENCES BEGIN GLOBAL RELATIVE BETWEEN GO RESTRICT BIT GOTO REVOKE BIT_LENGTH GRANT RIGHT BOTH GROUP ROLLBACK BY HAVING ROWS CASCADE HOUR SCHEMA CASCADED IDENTITY SCROLL CASE IMMEDIATE SECOND CAST IN SECTION CATALOG INCLUDE SELECT CHAR INDEX SESSION CHAR_LENGTH INDICATOR SESSION_USER CHARACTER INITIALLY SET CHARACTER_LENGTH INNER SIZE CHECK INPUT SMALLINT CLOSE INSENSITIVE SOME COALESCE INSERT SPACE COLLATE INT SQL COLLATION INTEGER SQLCA COLUMN INTERSECT SQLCODE COMMIT INTERVAL SQLERROR CONNECT INTO SQLSTATE CONNECTION IS SQLWARNING CONSTRAINT ISOLATION SUBSTRING CONSTRAINTS JOIN SUM CONTINUE KEY SYSTEM_USER CONVERT LANGUAGE TABLE CORRESPONDING LAST TEMPORARY COUNT LEADING THEN CREATE LEFT TIME CROSS LEVEL TIMESTAMP CURRENT LIKE TIMEZONE_HOUR CURRENT_DATE LOCAL TIMEZONE_MINUTE CURRENT_TIME LOWER TO CURRENT_TIMESTAMP MATCH TRAILING CURRENT_USER MAX TRANSACTION CURSOR MIN TRANSLATE DATE MINUTE TRANSLATION DAY MODULE TRIM DEALLOCATE MONTH TRUE DEC NAMES UNION DECIMAL NATIONAL UNIQUE DECLARE NATURAL UNKNOWN DEFAULT NCHAR UPDATE DEFERRABLE NEXT UPPER DEFERRED NO USAGE DELETE NONE USER DESC NOT USING DESCRIBE NULL VALUE DESCRIPTOR NULLIF VALUES DIAGNOSTICS NUMERIC VARCHAR DISCONNECT OCTET_LENGTH VARYING DISTINCT OF VIEW DOMAIN ON WHEN DOUBLE ONLY WHENEVER DROP OPEN WHERE ELSE OPTION WITH END OR WORK END-EXEC ORDER WRITE ESCAPE OUTER YEAR EXCEPT OUTPUT ZONE EXCEPTION 将来的关键字
以下关键字可能会保留在将来的 SQL Server 版本中，作为将来要实现的新特性。注意，不要使用这些关键字作为标识符。
ABSOLUTE FOUND PRESERVE ACTION FREE PRIOR ADMIN GENERAL PRIVILEGES AFTER GET READS AGGREGATE GLOBAL REAL ALIAS GO RECURSIVE ALLOCATE GROUPING REF ARE HOST REFERENCING ARRAY HOUR RELATIVE ASSERTION IGNORE RESULT AT IMMEDIATE RETURNS BEFORE INDICATOR ROLE BINARY INITIALIZE ROLLUP BIT INITIALLY ROUTINE BLOB INOUT ROW BOOLEAN INPUT ROWS BOTH INT SAVEPOINT BREADTH INTEGER SCROLL CALL INTERVAL SCOPE CASCADED ISOLATION SEARCH CAST ITERATE SECOND CATALOG LANGUAGE SECTION CHAR LARGE SEQUENCE CHARACTER LAST SESSION CLASS LATERAL SETS CLOB LEADING SIZE COLLATION LESS SMALLINT COMPLETION LEVEL SPACE CONNECT LIMIT SPECIFIC CONNECTION LOCAL SPECIFICTYPE CONSTRAINTS LOCALTIME SQL CONSTRUCTOR LOCALTIMESTAMP SQLEXCEPTION CORRESPONDING LOCATOR SQLSTATE CUBE MAP SQLWARNING CURRENT_PATH MATCH START CURRENT_ROLE MINUTE STATE CYCLE MODIFIES STATEMENT DATA MODIFY STATIC DATE MODULE STRUCTURE DAY MONTH TEMPORARY DEC NAMES TERMINATE DECIMAL NATURAL THAN DEFERRABLE NCHAR TIME DEFERRED NCLOB TIMESTAMP DEPTH NEW TIMEZONE_HOUR DEREF NEXT TIMEZONE_MINUTE DESCRIBE NO TRAILING DESCRIPTOR NONE TRANSLATION DESTROY NUMERIC TREAT DESTRUCTOR OBJECT TRUE DETERMINISTIC OLD UNDER DICTIONARY ONLY UNKNOWN DIAGNOSTICS OPERATION UNNEST DISCONNECT ORDINALITY USAGE DOMAIN OUT USING DYNAMIC OUTPUT VALUE EACH PAD VARCHAR END-EXEC PARAMETER VARIABLE EQUALS PARAMETERS WHENEVER EVERY PARTIAL WITHOUT EXCEPTION PATH WORK EXTERNAL POSTFIX WRITE FLASE PREFIX YEAR FIRST PREORDER ZONE FLOAT PREPARE
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