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php - Some questions about adding index to mysql database

I have some questions about mysql indexes. I have consulted a lot of information, but the information is very ...

From [MySQLdiscussion group] 2017-06-30 09:53:12 0  4  1041

mysql_replication - What to do if a single writing database cannot meet the performance requirements when mysql reads and writes are separated?

When mysql reads and writes are separated, what should I do if a single writing database cannot meet the perfo...

From [MySQLdiscussion group] 2017-06-20 10:05:42 0  2  1041

mysql導入速度慢

大約有三四千萬條記錄，使用mysqldump導出，在本地導入的時候（使用source xxx.sql的方式），感覺很慢，到某表一條記錄可能比較大，才一次insert3000+條,平均用二三十秒。本地的目標數(shù)據(jù)庫的參數(shù)in...

From [MySQLdiscussion group] 2017-04-17 13:07:25 0  3  1039

VS2013 c++連接mysql 在源文件中添加libmysql.dll報錯 不添加也報錯！ 請問我該怎么辦？

main.cpp {代碼...} sqlConnection.h {代碼...} sqlConnection.cpp {代碼...} 存在libmysql.dll報錯信息為：0x00007FFED00441E6 (lib...

From [MySQLdiscussion group] 2017-04-17 13:43:16 0  4  1037

MySqlConnector: MySqlBulkLoader class. Upload empty data from csv to MySQL table

From MySqlConnector.MySQLBulkLoader class I want to convert csv to MySQL table keeping null values.

From [MySQLdiscussion group] 2024-04-06 14:35:18 0  1  1036

What is the error in the MySQL create table structure statement?

(www.sf.gg) is China's leading developer technology community. We hope to provide a pure, high-quality technic...

From [MySQLdiscussion group] 2017-06-26 10:49:29 0  3  1036

mysql - 多個學校管理系統(tǒng)數(shù)據(jù)庫設計

需求： 多個學校的管理系統(tǒng)，數(shù)據(jù)表大概如下: 學校表(多個學校的信息) 校區(qū)表 (每個學校有多個校區(qū)) 校部表 (每個校區(qū)分小學、初中、高中部) 年級表 班級表 老師表 學生表 問題： 學生表中除了class_id，還需...

From [MySQLdiscussion group] 2017-04-17 16:06:02 0  0  1036

MySQL initialization error, solution

From [MySQLdiscussion group] 2021-04-27 09:31:07 0  1  1035

Is full count query really that slow on a large MySQL InnoDB table?

We have a large table with millions of entries. Full counting is very slow, see code below. Is this common for...

From [MySQLdiscussion group] 2023-11-07 15:52:43 0  2  1033

mysql - There is a many-to-many relationship between one table and multiple tables. How to design it?

Recently, I encountered a problem of associating one table with multiple tables. For example: There is an appl...

From [MySQLdiscussion group] 2017-06-06 09:52:18 0  7  1033

mybatis - Java about Mysql random id generation

I am working on an e-commerce project and encountered a problem when generating the ID. It is definitely not p...

From [MySQLdiscussion group] 2017-05-18 10:44:55 0  3  1033

node.js - 為什么nodejs連接mysql查詢出來的結果和命令行查詢不一致？

最近使用nodejs連接mysql，訪問禪道系統(tǒng)的數(shù)據(jù)庫做數(shù)據(jù)統(tǒng)計時遇到奇怪問題1：禪道系統(tǒng)可以正常使用2：通過phpmyadmin可以正常訪問mysql下的數(shù)據(jù)庫3：命令行也可以正常訪問mysql4：通過自己寫的nod...

From [MySQLdiscussion group] 2017-04-17 14:42:58 0  0  1032

php - 數(shù)據(jù)庫與邏輯應用分離的情況下怎么保證信息同步，或者叫安全

我不太明白這個詞怎么表達 是這樣的，現(xiàn)在有一臺服務器運行數(shù)據(jù)庫（server），另外一臺運行php程序（client），瀏覽器(Browser)訪問client，然后client邏輯判斷后通過http協(xié)議對server中...

From [MySQLdiscussion group] 2017-04-17 16:48:34 0  6  1031

為什么大家都不推薦使用MySQL觸發(fā)器而用存儲過程？

不止一次在各大論壇，文章中看到大多數(shù)人不推薦觸發(fā)器，統(tǒng)統(tǒng)推薦存儲過程。這是為什么呢？現(xiàn)在的場景是：1000萬數(shù)據(jù)，1萬并發(fā)的規(guī)模。疑問：我的理解是：觸發(fā)器本身就是特殊的存儲過程，那么如果業(yè)務邏輯本身不需...

From [MySQLdiscussion group] 2017-04-17 14:49:37 0  3  1030

MySQL：此種查詢結果，怎么僅保留第一條記錄？

select id, value from test;查詢結果如下id valueyy 123zz 234zz 456 僅想保留id字段的第一條記錄，在5.7以下版本中使用"select id, value f...

From [MySQLdiscussion group] 2017-04-17 14:41:39 0  3  1028