msql 8.0 执行语句:
SELECT * FROM groups;
会报如题的错误,
需加反引号进行修改:
SELECT * FROM `groups`;
//////////分割线////////////
执行select语句：
select * from cfg_parameter where key='nSJtifqVSI7HkPrKHlxhD6';
ERROR 1064 (42000): 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 'key='nSJtifqVSI7HkPrKHlxhD6'' at line 1
乍一看，好像这条语句并没有什么问题。但是执行之后mysql确实报错了，所以肯定是有问题的。
排查：select * from cfg_parameter where 没有问题，key也没问题，='nSJtifqVSI7HkPrKHlxhD6';也没有问题。
等等，再仔细看看，发现key是mysql的保留字，当使用了mysql保留字，需要用反引号将其引起来，也就是键盘数字1旁边的键（` `）。
解决方法：
1、若使用了mysql的保留字，需要将其用反引号引起来。
mysql> select * from cfg_parameter where `key`='nSJtifqVSI7HkPrKHlxhD6';
+------+------------------------+----------------------+-----------+-----------------------------------------------------------+------------+
| id | key | cfg_name | option_id | parameter_content | is_deleted |
+------+------------------------+----------------------+-----------+-----------------------------------------------------------+------------+
| 5 | nSJtifqVSI7HkPrKHlxhD6 | ACTIONID_LIST_TO_RCP | NULL | {"ACTION_IDS":"0~90001"} | 0 |
+------+------------------------+----------------------+-----------+-----------------------------------------------------------+------------+
2、建议不要在创建表的过程中使用mysql保留字，避免后期造成麻烦。
mysql保留字：
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 CONNECTION 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
GOTO 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 IS
ITERATE JOIN KEY
KEYS KILL LABEL
LEADING LEAVE LEFT
LIKE LIMIT LINEAR
LINES LOAD LOCALTIME
LOCALTIMESTAMP LOCK LONG
LONGBLOB LONGTEXT LOOP
LOW_PRIORITY MATCH 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
PRECISION PRIMARY PROCEDURE
PURGE RAID0 RANGE
READ READS REAL
REFERENCES REGEXP RELEASE
RENAME REPEAT REPLACE
REQUIRE RESTRICT RETURN
REVOKE RIGHT RLIKE
SCHEMA SCHEMAS SECOND_MICROSECOND
SELECT SENSITIVE SEPARATOR
SET SHOW 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 X509
XOR YEAR_MONTH ZEROFILL
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