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tablespace - MySQL從5.5升級(jí)到5.7后innodb_file_per_table默認(rèn)開啟問(wèn)題

最近將數(shù)據(jù)庫(kù)從庫(kù)從5.5升級(jí)到5.7,發(fā)現(xiàn)儲(chǔ)存MySQL磁盤空間一下子占用變大了很多，排查了一下發(fā)現(xiàn)是升級(jí)后MySQL的系統(tǒng)表空間(ibdata1)很大[原本就很大],單個(gè)innodb表的表空間也變得很大[升級(jí)后變大]，...

?? [MySQL?? ??] 2017-04-17 15:30:18 0  1  858

Python/MySQL? ?? ???? ???? ??? ? ????.

???? ??? ???? ????. ??? ??? ??? ??? ???? ?? ?? ? ??? ???? ???. ??? ????? ??? 25000000000?? ????? mysql? 214748...

?? [MySQL?? ??] 2024-04-04 19:09:44 0  1  857

30? ?? ????? PowerShell?? ???? MySQL ??? ?? ??? ??? ??????

SQLyog(?? ???? GUI)?? ??? ? ? ?? ??? MySQLSELECT ??? ????. PowerShell(SimplySQL ??)? ?? ??? ??? ??? ????? ?? ?...

?? [MySQL?? ??] 2023-09-10 13:18:46 0  1  857

mysql - sql動(dòng)態(tài)列的問(wèn)題？

如下表province_name province_code city_name city_code country_name contry_code北京 110000 北京 110000 東城 110101天津 120...

?? [MySQL?? ??] 2017-04-17 13:23:50 0  1  857

mysql - 數(shù)據(jù)庫(kù)命名規(guī)范？

看老師給的文檔，數(shù)據(jù)庫(kù)命名很亂，有sname這樣的，又有t_sex這樣的。在網(wǎng)上查數(shù)據(jù)庫(kù)的命名規(guī)范，有說(shuō)要用Pascal命名法的，有說(shuō)用下劃線的，還有的說(shuō)列名一律采用“TeacherName”“TeacherID”這種，...

?? [MySQL?? ??] 2017-04-17 13:02:39 0  2  857

MySQL?? ???? ??? ???? ???? ??? ??????

Zhang San? ??? ??? ???? ???? ??? ??????

?? [MySQL?? ??] 2017-05-19 10:07:26 0  1  856

MySQL - ?? ?? ? ??? ???? ??????? ??????.

?? ??? ??? ??? ????. ACCOUNTS ???? ? INSERT? ?? ?? ??(??) ??? ??? ????? status='E'phpcnend? pk=NEW.edit_oncphp...

?? [MySQL?? ??] 2023-10-16 20:01:46 0  2  855

MySql?? ?? ?? ?? ???? ???? ??? ?? ??? ????? ??? ??????.

MySql?? ?? ?? ?? ???? ???? ??? ?? ??? ?????

?? [MySQL?? ??] 2017-06-06 09:51:59 0  5  855

mysql - ??????? ?? ????? ??? ??? ??????

??????? ?? ????? ??? ??? ?????? ??? ???? ??? ?? ???? ? ???? ?????!

?? [MySQL?? ??] 2017-05-18 10:54:59 0  3  855

?? ??? ??? ??? ????. ????? ??? MySQL ??? ??

??? ?? mysql ??? ?? ????. Select*from "User"; ??? ?????. SQL ??? ??? ????. 1?? "User" ????...

?? [MySQL?? ??] 2023-10-24 22:39:00 0  1  854

/home/jokebo/public_html/index.php:23? ???? ?? ?? 'text'

SQL ??????? ???? PHP ????? ????. ??? ?? ???? ??? ?? ???? ? ??? ????. $sher=$db->query("SELECT*FROMsher...

?? [MySQL?? ??] 2023-09-16 16:33:51 0  1  854

數(shù)據(jù)庫(kù)設(shè)計(jì) - web項(xiàng)目，mysql數(shù)據(jù)庫(kù)只會(huì)增刪改查，應(yīng)該怎樣提高？有沒(méi)有書籍推薦？

感覺(jué)就會(huì)將數(shù)據(jù)通過(guò)php來(lái)進(jìn)行增刪改查，不知道在一個(gè)web項(xiàng)目中具體怎樣來(lái)設(shè)計(jì)數(shù)據(jù)庫(kù)，根據(jù)網(wǎng)站的功能，應(yīng)該設(shè)計(jì)多少個(gè)表這樣的。比如我要實(shí)現(xiàn)對(duì)于一篇文章添加標(biāo)簽這樣的功能（像本站這樣的），應(yīng)該怎樣設(shè)計(jì)數(shù)據(jù)...

?? [MySQL?? ??] 2017-04-17 11:55:28 0  2  854

Mysql 更新數(shù)據(jù)時(shí)間不穩(wěn)定

如圖，一條同樣的SQL語(yǔ)句，有些執(zhí)行160多ms，有些執(zhí)行50ms。 有什么因素會(huì)造成這么不穩(wěn)定的查詢時(shí)間呢？ID 是主鍵。 查詢和更新的頻率為2：1。沒(méi)有鎖表的語(yǔ)句。

?? [MySQL?? ??] 2016-11-07 14:37:44 0  1  854

MySQL ?? ??? if ?

??? ?? select ?? if ??? ?? ???? ???? ????. SELECTt.id,IF(id>10,@var1:=t.id;@var2:=t.title,t.title) FROMtabl...

?? [MySQL?? ??] 2023-09-19 16:06:52 0  1  853

mysql ?? ? ?? ??

table1? table2?? ? ?? ???? ????. {??...} ??? ???? ?? ?? ??? ? ??? ???? ??? ??? ????. : A: id, caseid B ：id,cas...

?? [MySQL?? ??] 2017-06-28 09:23:42 0  3  853