Database

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 38

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 41

Error updating database.  Cause: java.sql.SQLSyntaxErrorException: ORA-00947: Not enough values

### Error updating database. Cause: java.sql.SQLSyntaxErrorException: ORA-00947: There are not enough values ### The error may involve com.esoon.i...
2020-12-02 18:04 views 42

MySQL Not recommended UUID Reason as primary key

The foreword was only known before UUID Not suitable for primary key , But I don't know the specific reason , I learned about it recently , Make a...
2020-12-01 22:04 views 24

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 25

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 26

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 37

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 19

SQL SERVER Splits comma separated strings into lines

available data , Like hobbies hobby, There are multiple hobbies separated by commas and stored together , Now you need to separate them and put t...
2020-09-30 18:56 views 18

Big data training and sharing for good programmers mysql data type

Big data training and sharing for good programmers mysql data type , Introduction to data types • Data type setting • Column properties • Chara...
2020-09-10 16:01 views 31
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