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mysql優(yōu)化 - MySQL-SQl語句優(yōu)化步驟

RT，在遇到一個運行很慢SQL的情況下，如何進(jìn)行分析、優(yōu)化、測試？簡單說明一下步驟思路；

From [MySQLdiscussion group] 2017-04-17 14:26:12 0  2  954

MySQL error: "Each derived table must have its own alias" What does it mean?

I'm running this query on MySQL SELECTIDFROM(SELECTID,msisdnFROM(SELECT*FROMTT2)); and it gives this error: Ea...

From [MySQLdiscussion group] 2023-10-10 20:45:21 0  2  953

Possibility to store ASP Classic code as string in MYSQL database

Is it possible to store asp classic code into a MySQL database and have it execute the code when pulled? For e...

From [MySQLdiscussion group] 2024-04-06 13:38:43 0  1  952

linux - 為什么我在mysql的my.cnf下找不到bind-address？

1.描述：我在ubuntu16.04LTS上按照這個教程http://os.51cto.com/art/20130...裝了LAMP，然而在配置MySQL的時候想確認(rèn)在MySQL的my.cnf文件中是否有正確的綁定地址時...

From [MySQLdiscussion group] 2017-04-17 15:51:09 0  4  952

sql statement - How to add users in batches in mysql?

To configure the company server, you need to create new MySQL accounts for everyone. It is too troublesome to ...

From [MySQLdiscussion group] 2017-06-10 09:49:40 0  1  951

DomPDF: Image is unreadable or empty

For some reason, DomPDF does not render images contained in the html being parsed: However, when the image is ...

From [MySQLdiscussion group] 2023-08-29 14:06:26 0  2  950

window下mysql中文亂碼怎么解決？？

window環(huán)境，mysql5.1.71配置文件中設(shè)置了： [mysql] default-character-set=utf8 [mysqld] character-set-server=utf8 而且 像類似： ch...

From [MySQLdiscussion group] 2017-04-17 15:02:01 0  3  950

How to solve the problem of running bash commands that require password in Python

I'm writing a Python function that needs to export a MySQL database to a .sql file using bash. I am using the ...

From [MySQLdiscussion group] 2024-03-22 13:20:24 0  1  949

MYSQL: Best choice for accent-sensitive but case-insensitive UTF settings

For example, ?ν or ?ν are the same but should be distinguished from ?ν/?ν. I tried utf8_bin which seems to be ...

From [MySQLdiscussion group] 2023-09-07 20:59:31 0  1  949

Why do some mysql connections select old data of mysql database after delete+insert?

I have a problem with sessions in my python/wsgiweb application. Each thread in the 2 wsgi daemons has a diffe...

From [MySQLdiscussion group] 2023-10-30 12:37:20 0  2  948

Foreign key constraint failed: cannot add or update child row (Error 1452)

I created the table in MySQLWorkbench as follows: ORDRE table: CREATETABLEOrdre(OrdreIDINTNOTNULL,OrdreDatoDAT...

From [MySQLdiscussion group] 2023-10-08 23:40:09 0  1  948

How to use UNIQUE of PHP and MySQL to ensure that the user name is unique like JD.com registration?

I think that such quick judgment of duplicate user names is achieved by setting the user name field UNIQUE and...

From [MySQLdiscussion group] 2017-06-28 09:23:08 0  3  948

Mysql 5.7.18 cannot find the configuration file my.cnf under mac OSX10.12.4 (16E195)

As the title states, the Internet says that the my.cnf file is found for configuration, but this version of my...

From [MySQLdiscussion group] 2017-05-18 10:49:09 0  1  948

navicat-fot-mysql - 怎樣使用Navicat for Mysql連接Ubuntu虛擬機(jī)上的mysql服務(wù)器

{代碼...} Navicat for Mysql中主機(jī)名或IP地址是localhost,

From [MySQLdiscussion group] 2017-04-17 12:03:49 0  4  947

mysql - beego的orm每update,delete,read的時候都要給主鍵值？？？？

{代碼...} } {代碼...} ``` 代碼是這樣的。然后運行報錯： {代碼...}

From [MySQLdiscussion group] 2017-04-17 11:15:39 0  3  947