You have an error in your SQL syntax; check the manual that corresponds to your MySQL server versio····这句话对于咱们并不陌生,无非就是多了“,”之类的问题。但是你如果无意之中添加了一个mysql中的保留字段作为数据库中存贮的字段名,悲剧就这样发生了。
前几天因为功能的临时变更,需要给数据表添加一个字段用来区别导入的批次,我就在mysql中添加了group字段,没想到我的噩梦就此展开·····
本来程序已经接近收尾,本想着今早来公司给程序来个欢乐的结尾,没想到····每次导入excel表总是提示我sql语句错误,我变在sql语句上添添减减,也没有把错误搞定,整整一个上午外加下午两个小时,简直已经到了抓狂的程度。简直要跪地苦思冥想,但是还是没有搞定这个错误。
把问题放在一边,继续搞其他的东西····当在写一个group by 语句时,突然意识到,group 是mysql的一个保留字,就此问题迎刃而解。切记切记,多么痛的领悟啊
mysql的保留字段
在MySQL中,下表中的字显式被保留。其中大多数字进制被标准SQL用作列名和/或表名(例如,GROUP)。少数被保留了,因为MySQL需要它们,在MySQL中,当表名或字段名乃至数据库名和保留字冲突时,在sql语句里可以用撇号()括起来,当让我们一般都尽量少使用这些保留的字段。
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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