云数据库 RDS MySQL 版基础知识-阿里云

掌握MySQL数据库基础知识的同步练习与实训

掌握MySQL数据库基础知识的同步练习与实训。一、选择题 1.以下哪个mysql命令可以查看数据表的结构信息? （ B ）A)show tables; B)desc表名 C) create table 表名 D) select * from 表名? mysql哪些命令可以用于选择数据库?（ C ）A...

第13章事务基础知识【3.事务篇】【MySQL高级】5

演示4：幻读会话A&Bmysql> select @@transaction_isolation; +-------------------------+ | @@transaction_isolation | +-------------------------+ | REPEATA...

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实时数据接入：5分钟上手 Flink MySQL 连接器

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RDS MySQL 高效设计及性能调优

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第13章事务基础知识【3.事务篇】【MySQL高级】4

事务B就读到了临时数据演示二会话Amysql> begin; Query OK, 0 rows affected (0.00 sec) mysql> update account set balance = balance - 100 where id = 1; Query OK, 1 ...

第13章事务基础知识【3.事务篇】【MySQL高级】3

3.5 如何设置事务的隔离级别通过下面的语句修改事务的隔离级别：SET [GLOBAL|SESSION] TRANSACTION ISOLATION LEVEL 隔离级别; #其中，隔离级别格式： > READ UNCOMMITTED > READ COMMITTED > REPE...

第13章事务基础知识【3.事务篇】【MySQL高级】2

2.3 隐式提交数据的情况数据定义语言(Data definition language，缩写为:DDL)数据库对象，指的就是数据库、表、视图、存储过程等结构。当使用CREATE 、ALTER、 DROP等语句去修改数据库对象时，就会隐式的提交前边语句所属于的事务。即:BEGIN...

第13章事务基础知识【3.事务篇】【MySQL高级】1

前言2022/8/9 18:05暑假学习ing推荐【MySQL数据库教程天花板，mysql安装到mysql高级，强！硬！-哔哩哔哩】尚硅谷MySQL学习笔记MySQL笔记：第13章_事务基础知识第13章事务基础知识1.数据库事务概述事务是数据库区别于文件系统的重要特性之一，当有了事务就会让数据库始...

[MySQL]基础知识笔记（数据库与表操作）

内存与硬盘的区别：内存：容量小，速度快，造价高，断电后数据丢失硬盘：容量大，速度慢，造价低，断电后数据不丢失常见的关系型数据库：1.ACCESS-微软出的在OFFICE里集成的一个小型数据库；SQLITE-常用在手机APP里，桌面...

【MySQL】数据库基础知识汇总和增删改查操作

1.数据库基础知识:什么是数据库：这是一类具体的软件，把很多的数据给组织起来，在数据库这个软件内部会广泛的使用到数据结构，将数据组织起来的目的就是为了增删查改关系型数据库：MySQL、SQL Server、Oracle、SQLite（超轻量级数据库）非关系型数据库：Redis、HBas...

[MySQL] SQL 基础知识

资料根据【MySQL数据库教程天花板，mysql安装到mysql高级，强！硬！】整理资料链接：百度网盘：链接：https://pan.baidu.com/s/1KboU_3EZJxrezMWZ2klP6g提取码：1234阿里云盘【MySQL】1. SQL的分类SQL语言在功能上主要分...

MySQL常见DDL语法：掌握数据库定义语言的基础知识

作为最受欢迎和广泛使用的关系型数据库之一，MySQL提供了丰富的DDL（数据定义语言）语法，用于创建、修改和删除数据库、表和其他数据库对象。在本文中，我们将介绍MySQL中一些常见的DDL语法，帮助您掌握数据库定义语言的基础知识。以下是一些常用的 MySQL DDL（Data Definition ...

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