MySQL关键字-保留字

　　明天写一个数据库更新语句，反省了N遍都没有反省出哪里过失，当时发觉只需去掉 key=$key就能够一般运转，当时去群外面一问，本来key是MySQL的关键字，不能运用的，难怪我觉得希奇，胜利了几百次的更新语句竟然会失利，给key加上``（键盘1右边那个符号，不是逗号）变成`key`就行了。

　　　　　　　　　　MySQL关键字-保存字

　　ADDALLALTERANALYZEANDASASCASENSITIVEBEFOREBETWEENBIGINTBINARYBLOBBOTHBYCALLCASCADECASECHANGECHARCHARACTERCHECKCOLLATECOLUMNCONDITIONCONNECTIONCONSTRAINTCONTINUECONVERTCREATECROSSCURRENT_DATECURRENT_TIMECURRENT_TIMESTAMPCURRENT_USERCURSORDATABASEDATABASESDAY_HOURDAY_MICROSECONDDAY_MINUTEDAY_SECONDDECDECIMALDECLAREDEFAULTDELAYEDDELETEDESCDESCRIBEDETERMINISTICDISTINCTDISTINCTROWDIVDOUBLEDROPDUALEACHELSEELSEIFENCLOSEDESCAPEDEXISTSEXITEXPLAINFALSEFETCHFLOATFLOAT4FLOAT8FORFORCEFOREIGNFROMFULLTEXTGOTOGRANTGROUPHAVINGHIGH_PRIORITYHOUR_MICROSECONDHOUR_MINUTEHOUR_SECONDIFIGNOREININDEXINFILEINNERINOUTINSENSITIVEINSERTINTINT1INT2INT3INT4INT8INTEGERINTERVALINTOISITERATEJOINKEYKEYSKILLLABELLEADINGLEAVELEFTLIKELIMITLINEARLINESLOADLOCALTIMELOCALTIMESTAMPLOCKLONGLONGBLOBLONGTEXTLOOPLOW_PRIORITYMATCHMEDIUMBLOBMEDIUMINTMEDIUMTEXTMIDDLEINTMINUTE_MICROSECONDMINUTE_SECONDMODMODIFIESNATURALNOTNO_WRITE_TO_BINLOGNULLNUMERICONOPTIMIZEOPTIONOPTIONALLYORORDEROUTOUTEROUTFILEPRECISIONPRIMARYPROCEDUREPURGERAID0RANGEREADREADSREALREFERENCESREGEXPRELEASERENAMEREPEATREPLACEREQUIRERESTRICTRETURNREVOKERIGHTRLIKESCHEMASCHEMASSECOND_MICROSECONDSELECTSENSITIVESEPARATORSETSHOWSMALLINTSPATIALSPECIFICSQLSQLEXCEPTIONSQLSTATESQLWARNINGSQL_BIG_RESULTSQL_CALC_FOUND_ROWSSQL_SMALL_RESULTSSLSTARTINGSTRAIGHT_JOINTABLETERMINATEDTHENTINYBLOBTINYINTTINYTEXTTOTRAILINGTRIGGERTRUEUNDOUNIONUNIQUEUNLOCKUNSIGNEDUPDATEUSAGEUSEUSINGUTC_DATEUTC_TIMEUTC_TIMESTAMPVALUESVARBINARYVARCHARVARCHARACTERVARYINGWHENWHEREWHILEWITHWRITEX509XORYEAR_MONTHZEROFILL

　　MySQL答应局部关键字用做未惹起来的辨认符，由于很多人以前曾运用过它们。上面列出了一些例子：

　　ACTION

　　BIT

　　DATE

　　ENUM

　　NO

　　TEXT

　　TIME

　　TIMESTAMP

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