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深入理解mysql字段名和保留字冲突的问题

时间:2021-07-01 10:21:17 帮助过:45人阅读

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

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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

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READ

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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

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TRUE

UNDO

UNION

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UPDATE

USAGE

USE

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UTC_DATE

UTC_TIME

UTC_TIMESTAMP

VALUES

VARBINARY

VARCHAR

VARCHARACTER

VARYING

WHEN

WHERE

WHILE

WITH

WRITE

XOR

YEAR_MONTH

ZEROFILL

NewReserved Words in MySQL 5.6

GET

IO_AFTER_GTIDS

IO_BEFORE_GTIDS

MASTER_BIND

ONE_SHOT

PARTITION

SQL_AFTER_GTIDS

SQL_BEFORE_GTIDS

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