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mysql - database creation field, what is the difference between default value empty and empty string 110

mysql database, navicat tool. Prerequisite, this field is set to NOT NULL, so the default value cannot be set ...

From [MySQLdiscussion group] 2017-05-18 10:55:59 0  1  1344

After phpstudy is installed, the database is very slow to open. What is the reason?

After phpstudy is installed, the database is very slow to open. What is the reason?

From [MySQLdiscussion group] 2017-11-17 12:52:44 0  1  1342

MySQl cannot manage the database, how to solve it

The requested URL /phpMyAdmin/ was not found on this server. The database cannot be managed. How to solve the ...

From [MySQLdiscussion group] 2017-12-09 10:24:36 0  1  1341

Newly installed PHPstudy

Not FoundThe requested URL /phpMyAdmin/ was not found on this server. Why did I just download the newly instal...

From [MySQLdiscussion group] 2018-06-29 16:55:01 0  1  1340

后臺實(shí)現(xiàn)分頁，并向前臺傳遞rows，傳遞的JSON數(shù)據(jù)不完整

后臺實(shí)現(xiàn)分頁，將JSON對象傳給前臺，為什么只有第一個顯示，其他的都不顯示。。為什么只有0：顯示完整的關(guān)聯(lián)school的信息。其他的不完整呢？

From [MySQLdiscussion group] 2016-11-16 14:33:55 0  4  1338

When does the mysql performance mode event "wait/synch/cond/sql/MYSQL_BIN_LOG::COND_done" trigger?

I'm using AuroraMysql5.7.mysql_aurora.2.07.2 and I'm facing a bottleneck in a load test that writes a large wo...

From [MySQLdiscussion group] 2024-03-27 15:58:10 0  2  1337

Field traversal, why do the two time fields of the database not appear?

Field traversal, why do the two time fields of the database not appear?

From [MySQLdiscussion group] 2018-12-17 23:28:50 0  2  1336

mysql無法刪除字段（錯誤1091），但是對該字段設(shè)置主鍵后就可刪除，為什么？

我為表student添加了字段xx，再想刪除時，提示error 1091。可是，為什么會出現(xiàn)這個錯誤？ 我在網(wǎng)上找到了這個辦法：給xx字段添加主鍵，然后果然刪除了。可是，主鍵不是不能刪除的嗎？這怎么又可以刪除了？這個辦....

From [MySQLdiscussion group] 2017-04-17 16:22:49 0  1  1336

linux - 關(guān)于mysql udf權(quán)限的問題？

昨天在服務(wù)器上執(zhí)行mysql udf函數(shù)sys_exec和sys_eval都很成功，今天重啟了一下服務(wù)器 打開mysql 用exec執(zhí)行任意命令都是返回32512 對應(yīng)linux的127 也就是無權(quán)限或者路徑錯誤.. 想...

From [MySQLdiscussion group] 2017-04-17 15:05:25 0  0  1335

SQL slow query causes CPU memory to reach 100%, what should I do?

It is said that there are a large number of slow query records in the database, and the execution time is too ...

From [MySQLdiscussion group] 2022-08-11 11:19:09 0  3  1331

mysql scripts presented /usr/bin/perl: bad interpreter

-bash: scripts/mysql_install_db: /usr/bin/perl: bad interpreter: No such file or directory但我已經(jīng)yum -y install p...

From [MySQLdiscussion group] 2017-06-26 10:49:24 0  2  1330

How to delete mysql installed in php programmer toolbox

I have been using wampServer before and it was pretty good. Recently, I went to the PHP Chinese website and yo...

From [MySQLdiscussion group] 2017-09-13 17:28:54 0  3  1329

為什么MySQL用戶那么多，而同樣優(yōu)秀的PostgreSQL卻很少人用

看到文章說PostgreSQL比MySQL甚至要好，為什么大家更愿意選擇mysql呢

From [MySQLdiscussion group] 2017-04-17 11:07:22 0  7  1328

SQL debugging tool (phpgjx) installation

Has this tool been successfully installed? Wait online. . . . . . Has this tool been successfully installed? W...

From [MySQLdiscussion group] 2019-09-23 15:30:54 0  1  1327

Use the mysql command line to connect to the remote database host jump

The host reported as ERROR 1045 denied for is the local area network IP address of this machine. Why is this?

From [MySQLdiscussion group] 2017-07-07 10:35:10 0  2  1326