Database

mysql Basic syntax of database

mysql Basic syntax of database DDL Operation creation database syntax ：create database Database name ; View all database syntax ：show databa...
2021-04-05 16:30 views 8

The induction and arrangement of paradigms （1NF,2NF,3NF,BCNF）

The first paradigm (1NF) The second normal form of standard table (2NF) The third normal form of partial functional dependence (3NF) transfe...
2021-04-01 09:12 views 6

27 Year old invention SQL in the future , God took him away

1974 year , Turing prize winner Charles · Bachman attends a database Conference , I met Edgar · Corder . Codd hasn't got a Turing Award yet , But i...
2021-01-27 08:51 views 4

Oracle2021 Annual safety warning ,8 There are two security vulnerabilities that need attention

| news flash Oracle company to 2021 year 1 month 19 day , The first annual security alert was issued . among , yes 8 Safety warnings an...
2021-01-20 13:57 views 8

First knowledge MySQL Comprehensive review （ dried food ）

In daily development and data query , We need to join multiple tables equivalently or left and right to query the related fields. Of course, we ne...
2020-12-25 14:10 views 5

JAVA Interview questions -Mysql database

1. Introduce them separately innodb and myisam?MyIASM yes MySQL Default engine , However, it does not provide support for database transactions ...
2020-12-03 11:14 views 7

Bug Can data be used as the basis of technical personnel assessment KPI?

As a software developer who lives by code , Available functions and Bug It's always mutual . There was a product iteration review meeting , I put ...
2020-11-29 14:18 views 3

sql server Add, delete, modify and query database （ Library and table ）

sql server Table add modify field modify table name add constraint view table structure instance package
2020-11-07 01:12 views 5

One MySQL I'll just hang you up , How dare you write on your resume “ master ”?

as everyone knows , Resume “ understand ＝ I've heard of names ; be familiar with ＝ Know what it is ; skilled ＝ Used ; master ＝ Made something ; Tw...
2020-10-26 20:20 views 4

Tiktok Java Three aspects of post technology sharing ：Java Basics + network HashMap+JVM+ database

one side （40 minute ） The comparative basis of one side question project Java Object What are the methods of a class , Separate action HashMap...
2020-10-13 16:00 views 4
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