msql 8.0 執行語句:

SELECT *  FROM groups;  

會報如題的錯誤,

需加反引號進行修改:

SELECT *  FROM `groups`;

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執行select語句：

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，好像這條語句並沒有什麼問題。但是執行之後mysql確實報錯了，所以肯定是有問題的。

排查：select * from cfg_parameter where 沒有問題，key也沒問題，='nSJtifqVSI7HkPrKHlxhD6';也沒有問題。

            等等，再仔細看看，發現key是mysql的保留字，當使用了mysql保留字，需要用反引號將其引起來，也就是鍵盤數字1旁邊的鍵（` `）。

解決方法：

1、若使用了mysql的保留字，需要將其用反引號引起來。

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、建議不要在建立表的過程中使用mysql保留字，避免後期造成麻煩。

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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