You have an error in your SQL syntax; check the manual that corresponds to your MySQL server versio····這句話對(duì)于咱們并不陌生，無非就是多了“，”之類的問題。但是你如果無意之中添加了一個(gè)mysql中的保留字段作為數(shù)據(jù)庫中存貯的字段名，悲劇就這樣發(fā)生了。
前幾天因?yàn)楣δ艿呐R時(shí)變更，需要給數(shù)據(jù)表添加一個(gè)字段用來區(qū)別導(dǎo)入的批次，我就在mysql中添加了group字段，沒想到我的噩夢(mèng)就此展開·····
本來程序已經(jīng)接近收尾，本想著今早來公司給程序來個(gè)歡樂的結(jié)尾，沒想到····每次導(dǎo)入excel表總是提示我sql語句錯(cuò)誤，我變?cè)趕ql語句上添添減減，也沒有把錯(cuò)誤搞定，整整一個(gè)上午外加下午兩個(gè)小時(shí)，簡(jiǎn)直已經(jīng)到了抓狂的程度。簡(jiǎn)直要跪地苦思冥想，但是還是沒有搞定這個(gè)錯(cuò)誤。
把問題放在一邊，繼續(xù)搞其他的東西····當(dāng)在寫一個(gè)group by 語句時(shí)，突然意識(shí)到，group 是mysql的一個(gè)保留字，就此問題迎刃而解。切記切記，多么痛的領(lǐng)悟啊
mysql的保留字段
在MySQL中，下表中的字顯式被保留。其中大多數(shù)字進(jìn)制被標(biāo)準(zhǔn)SQL用作列名和/或表名(例如，GROUP)。少數(shù)被保留了，因?yàn)镸ySQL需要它們，在MySQL中，當(dāng)表名或字段名乃至數(shù)據(jù)庫名和保留字沖突時(shí)，在sql語句里可以用撇號(hào)（）括起來,當(dāng)讓我們一般都盡量少使用這些保留的字段。
| 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 |
