深入理解mysql字段名和保留字冲突的问题

程序员文章站 2022-05-25 15:07:07

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这篇文章主要介绍了mysql字段名和保留字冲突的问题，有一定的参考价值，感兴趣的朋友可以参考一下，希望对你有所帮助！

建了个表，有个字段起名为key，结果insert语句报错了，说是sql不对。

建表语句如下：

CREATE TABLE `base_error_message_test` (
`message_id` varchar(50) NOT NULL,
`message` text ,
`send_count` int(2) DEFAULT '0' ,
`status` int(2) DEFAULT '0' ,
`last_modified_date` datetime DEFAULT NULL ,
`creation_date` datetime DEFAULT NULL ,
`topic` varchar(50) DEFAULT NULL,
`key` varchar(50) DEFAULT NULL,
PRIMARY KEY (`message_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='推送失败消息记录表';

以下语句是不对的：

select key from base_error_message_test;
INSERT INTO base_error_message_test (message_id, message, send_count, status, last_modified_date, creation_date, topic, key) VALUES (.......);

原因：字段key和mysql的保留字冲突了，当mysql的字段名和保留字冲突的时候，sql语句中的字段名需要加上反引号``来加以区别，反引号可以用Esc键下面那个按键在英文模式不按shift键打出来，注意，是反引号不是单引号，回车键左边那个是单引号。

所以上面两个语句可以这样写：

select `key` from base_error_message_test;
INSERT INTO base_error_message_test (message_id, message, send_count, status, last_modified_date, creation_date, topic, `key`) VALUES (.......);

另外附上mysql保留字列表：

Reserved Words in MySQL 5.6.23
ACCESSIBLE	ADD	ALL
ALTER	ANALYZE	AND
AS	ASC	ASENSITIVE
BEFORE	BETWEEN	BIGINT
BINARY	BLOB	BOTH
BY	CALL	CASCADE
CASE	CHANGE	CHAR
CHARACTER	CHECK	COLLATE
COLUMN	CONDITION	CONSTRAINT
CONTINUE	CONVERT	CREATE
CROSS	CURRENT_DATE	CURRENT_TIME
CURRENT_TIMESTAMP	CURRENT_USER	CURSOR
DATABASE	DATABASES	DAY_HOUR
DAY_MICROSECOND	DAY_MINUTE	DAY_SECOND
DEC	DECIMAL	DECLARE
DEFAULT	DELAYED	DELETE
DESC	DESCRIBE	DETERMINISTIC
DISTINCT	DISTINCTROW	p
DOUBLE	DROP	DUAL
EACH	ELSE	ELSEIF
ENCLOSED	ESCAPED	EXISTS
EXIT	EXPLAIN	FALSE
FETCH	FLOAT	FLOAT4
FLOAT8	FOR	FORCE
FOREIGN	FROM	FULLTEXT
GET	GRANT	GROUP
HAVING	HIGH_PRIORITY	HOUR_MICROSECOND
HOUR_MINUTE	HOUR_SECOND	IF
IGNORE	IN	INDEX
INFILE	INNER	INOUT
INSENSITIVE	INSERT	INT
INT1	INT2	INT3
INT4	INT8	INTEGER
INTERVAL	INTO	IO_AFTER_GTIDS
IO_BEFORE_GTIDS	IS	ITERATE
JOIN	KEY	KEYS
KILL	LEADING	LEAVE
LEFT	LIKE	LIMIT
LINEAR	LINES	LOAD
LOCALTIME	LOCALTIMESTAMP	LOCK
LONG	LONGBLOB	LONGTEXT
LOOP	LOW_PRIORITY	MASTER_BIND
MASTER_SSL_VERIFY_SERVER_CERT	MATCH	MAXVALUE
MEDIUMBLOB	MEDIUMINT	MEDIUMTEXT
MIDDLEINT	MINUTE_MICROSECOND	MINUTE_SECOND
MOD	MODIFIES	NATURAL
NOT	NO_WRITE_TO_BINLOG	NULL
NUMERIC	ON	OPTIMIZE
OPTION	OPTIONALLY	OR
ORDER	OUT	OUTER
OUTFILE	PARTITION	PRECISION
PRIMARY	PROCEDURE	PURGE
RANGE	READ	READS
READ_WRITE	REAL	REFERENCES
REGEXP	RELEASE	RENAME
REPEAT	REPLACE	REQUIRE
RESIGNAL	RESTRICT	RETURN
REVOKE	RIGHT	RLIKE
SCHEMA	SCHEMAS	SECOND_MICROSECOND
SELECT	SENSITIVE	SEPARATOR
SET	SHOW	SIGNAL
SMALLINT	SPATIAL	SPECIFIC
SQL	SQLEXCEPTION	SQLSTATE
SQLWARNING	SQL_BIG_RESULT	SQL_CALC_FOUND_ROWS
SQL_SMALL_RESULT	SSL	STARTING
STRAIGHT_JOIN	TABLE	TERMINATED
THEN	TINYBLOB	TINYINT
TINYTEXT	TO	TRAILING
TRIGGER	TRUE	UNDO
UNION	UNIQUE	UNLOCK
UNSIGNED	UPDATE	USAGE
USE	USING	UTC_DATE
UTC_TIME	UTC_TIMESTAMP	VALUES
VARBINARY	VARCHAR	VARCHARACTER
VARYING	WHEN	WHERE
WHILE	WITH	WRITE
XOR	YEAR_MONTH	ZEROFILL