• MySQL中的describe关键字


    今天写代码的时候,老是提示在You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'describe。
    写SQL语句的时候删掉这个字段就不会报错,加上这个字段添加和查询又会报错,纠结了很久,最后终于试着把describe改为describes,可以正常插入数据,也可以正常查询了,后面在网上一查,describe竟然是mysql中的关键词,我们不能用这个作为数据库中的表的字段。

    在SQL语句中出现的关键字和保留字 如果要使用人他们的字符意思而不是作为关键字、保留字使用,关键字可以正常使用,但是保留字必须使用`(键盘tab键上面,数字1左边的那个按键)来分割。这个在SQLServer里面是使用[]中括号实现的。所以我们要尽量避免使用关键字和保留字来作为表名和字段名。
     

    create table api_community_pic(
    id int(11) unsigned not null auto_increment primary key comment '图片id',
    user_id int(11) not null comment '用户id',
    title varchar(255) not null default '' comment '图片标题',
    `describe` varchar(255) not null default '' comment '图片描述',
    s3_url varchar(255) not null default '' comment '图片s3路径',
    praise int(10) NOT NULL DEFAULT '0' COMMENT '点赞数',
    status tinyint(1) unsigned not null default '0' comment '图片状态: 0 等待审核 1 审核通过 2审核不通过',
    created_at int(11) unsigned NOT NULL DEFAULT '0' COMMENT '上传时间'
    )comment='图片表';

    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

    DIV

    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

    NewReserved Words in MySQL 5.6

    GET

    IO_AFTER_GTIDS

    IO_BEFORE_GTIDS

    MASTER_BIND

    ONE_SHOT

    PARTITION

    SQL_AFTER_GTIDS

     

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  • 原文地址:https://www.cnblogs.com/lxwphp/p/15453125.html
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