MySQL

Create data mysql Library process

stay Django After the completion of the project , stay setting.py Set it in mysql Connection parameters ：DATABASES = { 'default': { 'ENG...
2020-10-15 21:18 views 3

mysql A complete collection of date functions

# What day of the week is a date （1= Sunday ,2= Monday ,…………,7= Saturday ）.SELECT DAYOFWEEK(2019-09-23) # What day of the week is a date （0= Monday...
2020-08-12 11:01 views 2

MYSQL Two level linkage

Table data query results { an electric appliance : [{ 1: [{ parent_id: 1, parent_name: Household Electric Appliances , son_id: 3, son_n...
2020-08-12 11:01 views 5

SQL Server Database Glossary

SQL Server Database vocabulary word meaning Activation activation ActiveX Data Objects(ADO)ActiveX data object ActiveX Data Objects(Multidimensio...
2020-08-09 14:18 views 4

MySQL The meaning and difference of row lock and table lock

The difference between row lock and table lock in Preface , It should be high frequency in the interview , We should be right MySQL There is a sys...
2020-08-06 09:53 views 4

MySql performance optimization

One . Table design optimization a. Field type optimization Generally, the tables with integer values are below 10 million , String based ta...
2020-08-06 09:53 views 1

Linux build Mysql Master slave server

When building a server, the database can be said to be the bottleneck of the server , When the server pressure is high, most of the bottlenecks ar...
2020-08-02 05:37 views 2

SQL Data analysis

But I want to say we try not to use it case when,DATEDIFF And so on . Because databases, especially mysql, Although these methods are provided , B...
2020-08-02 05:36 views 3

The routine of data migration

Types of data migration with the development of business , Storage will also need to be migrated frequently . The following scenarios are frequent...
2020-08-01 08:22 views 2

about mysql Manage transactions

premise ： The database engine must be InnoDB type . stay mysql in ,MyISAM and InnoDB Are the two most commonly used engines ,（ among MyISAM Is th...
2020-07-29 06:35 views 1
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