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pt-online-schema-change - Huge replication delay when renaming table

We are using ptosc on a PerconaMySQL5.7 database and at the end of the process we experienced a huge replicati...

From [MySQLdiscussion group] 2023-09-01 11:39:37 0  1  877

mysql "the right syntax to use near 'not null comment '身份'"

{代碼...} 報(bào)錯(cuò)信息： [Err] 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MyS...

From [MySQLdiscussion group] 2017-04-17 13:03:21 0  1  877

mysql - SQL語句，判斷數(shù)字大小，大于某值就減去一個(gè)制定數(shù)值

求個(gè)SQL語句，如圖中meta_value數(shù)值大于70的，自動(dòng)讓他減去70 如： 56，那么不變 78，那么78-70，讓他變成8 補(bǔ)充：謝謝，加個(gè)判斷條件，meta_key中必須是"views"才用...

From [MySQLdiscussion group] 2017-04-17 11:03:22 0  2  877

mysql 5.5 BIGINT UNSIGNED value is out of range？mysql 5.6有這個(gè)問題嗎？

百度之后說： mysql處理兩個(gè)整數(shù)（INT）相減的時(shí)候，如果其中有一個(gè)是UNSIGNED INT類型的，那么結(jié)果就被當(dāng)做是UNSIGNED的。

From [MySQLdiscussion group] 2017-04-17 15:29:20 0  1  876

[help]centos下安裝mysql后，在還未設(shè)置密碼的情況下無法進(jìn)入mysql。

1.centos-7.0下安裝mysql-5.72.此時(shí)還沒有設(shè)置過密碼，然后執(zhí)行mysql命令：mysql -r root3.提示錯(cuò)誤：ERROR 1045 (28000): Access denied for use...

From [MySQLdiscussion group] 2017-04-17 13:53:53 0  4  875

Am I able to use the mysql built-in function get_lock?

There is a batch job out there. And there are multiple servers that can handle the job. I only want the job to...

From [MySQLdiscussion group] 2023-09-15 21:20:11 0  1  874

mysql - 安裝gem報(bào)錯(cuò)

１．相應(yīng)的環(huán)境：　　　　ubuntu12.04 ruby 2.4 2.通過　 {代碼...} 安裝gem的時(shí)候報(bào)錯(cuò)： 　 Gem::Ext::BuildError: ERROR: Failed to build gem ...

From [MySQLdiscussion group] 2017-04-17 16:23:08 0  1  874

mysql 怎么做到update只更新一行數(shù)據(jù)？

{代碼...} 這句話的where部分有兩條記錄，我只想修改其中一條，該怎么寫？

From [MySQLdiscussion group] 2017-04-17 15:25:20 0  2  874

MySQL的VARCHAR最大值是多少？

我看很多MySQL的表里varchar(256)，好像就沒見過再大的了 varchar的最大值是多少？大于多少就不適合了？要用text

From [MySQLdiscussion group] 2017-04-17 11:09:16 0  3  874

php mysqli_connect: Authentication method unknown to client

I'm using phpmysqli_connect to log into a MySQL database (all on localhost) <?php//DEFINE('DB_USER','user2'...

From [MySQLdiscussion group] 2023-10-13 18:02:37 0  2  873

How to run Dapper/MySql queries in C# using user-defined variables

I've been trying to run this code: usingSystem;usingDapper;usingMySql.Data.MySqlClient;namespaceDapperTests{cl...

From [MySQLdiscussion group] 2023-08-25 23:41:09 0  2  873

Mysql connection cannot be established because the target machine actively refuses the connection

I know a lot of people have asked this question, but most of these people have forgotten their passwords that ...

From [MySQLdiscussion group] 2023-08-22 19:04:28 0  2  873

php - mysql fuzzy search problem

Please tell me how to match the following keywords. For example, the database storage characters are: sfsdf4-1...

From [MySQLdiscussion group] 2017-05-27 17:38:56 0  6  873

mysql-configuration - MySQL error, automatically hangs from time to time and cannot be started

mysql hangs up from time to time and cannot be started. What is the reason? my.cnf configuration: [client]port...

From [MySQLdiscussion group] 2017-05-18 10:55:52 0  6  873

yum - linux7.0安裝mysql的問題

安裝mysql {代碼...} 啟動(dòng)mysqlservice mysqld restart設(shè)置密碼 {代碼...} 可我沒設(shè)置密碼啊，網(wǎng)上找了幾個(gè)方式都沒用。

From [MySQLdiscussion group] 2017-04-17 16:33:55 0  6  873