I set a MySQL column to “NOT NULL” but still I can
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: InMySQLIhaveatablewithColumn1asNOTNULL: createtablemyTable ( Column1intnotnull, Column2intnot......
Deadlocks on MySQL deleting rows
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Wehavea(currentlyInnoDB)tablewhichcontainsroughly500,000rows.Thisrepresentsaqueueoftaskstorun.Itis......
MySQL nested JSON column search and extract sub JS
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IhaveaMySQLtableauthorswithcolumnsid,nameandpublished_books.Inthis,published_booksisaJSONcolumn.Withs......
Extracting filenames from a path MYSQL
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Isthereasimplyselectstatementusignacombinationofstringfunctionstopulloutafilenamefromadirectorylistin......
is a mysql temporary table unique for each user ac
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Whilelookingforawaytotemporarilysavethesearchresultswhenausersearchesforahotelfreebetweenparticulard......
how to change (Update) column name in table using
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IamnewtoMySQL.IcreatedatablewithcolumnnameFirstNamebutitiswrong. NowIwanttochangemycolumnnameFi......
mysql union vs multiple queries
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: I'minterestedtoknowifaunionisbetterthanrunningmultiplequeries. Ifso,aretheretimesthatmultiplequeries......
How to get all distinct words of a specified minim
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: InaMySQL5.6databaseIhavetabletablenamewhichhas(includingothers)threeTEXTcolumns:col_a,col_b,col_c. I......
数据库记录条数很少，只有几十条，但是把这几十条数据转成字符串大概有90M。insert总是失败，有什
问题: 数据库记录条数很少，只有几十条，但是把这几十条数据转成字符串大概有90M。insert总是失败，有什么解决办法 回答1: 什么东西呀？可以以文件的形式存放到磁盘，数据库里只记录文件地址，何如？ 另外，是不是你字段类型不对，你用......
Why we should have an ID column in the table of us
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: It'sobviousthatwealreadyhaveanotheruniqueinformationabouteachuser,andthatisusername.Then,whyweneedano......
MySQL: Why does an Order By ID runs much slower th
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: IamusingMySQLversion5.5.14torunthefollowingquery,QUERY1,fromatableof5Millionrows: SELECTP.ID,P.Type......
How do I select multiple values in the same column
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Iamtryingtoselectmultiplevaluesinasinglecolumn.BasicallyIwantthequerytoselectallthoseundercolumnfam......
How to stop LocalDate from changing when being sav
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: WhensavingaLocalDatefield(e.g.'2017-09-27')toamySQLDatecolumnusingJPACriteriaBuilderAPI,theresultisdif......
Explain inexplicable deadlock
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Firstofall,Idon'tseehowIcouldbegettinganydeadlockatall,sinceIamusingnoexplicitlocking,there'sonly......
Warning: The post-install step did not complete su
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Tryingtoinstallmysql5.7withbrewonMacOSHighSierra Ihaveusedthefollowingcommands: sudorm-rf/usr/local/v......
Does AWS RDS encryption with KMS affect performanc
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Amazonstatesthat Encryptionanddecryptionarehandledtransparentlysoyoudon’thavetomodifyyourapplication......
Declare variable syntax invalid in MySQL Workbench
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Iamtryingtocreateandsetavariable: DECLAREmyIdINT; SETmyId=5; However,Iamgettinginvalidsyntaxcomplai......
rails COUNT SELECT DISTINCT
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: I'mrecordingthenumberoftimesuserswatchaseriesofvideos.NowI'mtryingtomakeagraphofthenumberofusers......
Docker-compose: Database is uninitialized
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Ihaveaproblemwithdocker-composeandmysql: docker-compose.yml version:'2' services: db: image:mysql ......
update all NULL fields MySQL
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: I'dliketoupdateallNULLfieldsinonetableto0.Ofcourse UPDATEmytableSETfirstcol=0WHEREfirstcolISNULL ......
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