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2
codes/redis/redis-config/sentinel3/README.md
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@ -9,4 +9,4 @@
<div align="center">
<img src="instant-sentinel-setup.png" />
<p>图：一主两从三哨兵</p>
</div>
</div>

2
codes/redis/redis-in-action-py/README.md
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@ -1,3 +1,3 @@
# Redis 实战（Redis In Action）源码
搬运自：https://github.com/huangz1990/riacn-code
搬运自：https://github.com/huangz1990/riacn-code

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docs/flyway.md
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@ -37,7 +37,7 @@
（2）对于大多数项目而言，最简单的持续集成场景如下所示：
![flyway-sample](https://flywaydb.org/assets/balsamiq/Environments.png)
<br><div align="center"><img src="https://flywaydb.org/assets/balsamiq/Environments.png"/></div><br>
这意味着，我们不仅仅要处理一份环境中的修改，由此会引入一些版本冲突问题：
@ -68,13 +68,13 @@
最简单的场景是指定 Flyway 迁移到一个空的数据库。
![image](http://upload-images.jianshu.io/upload_images/3101171-bb6e9f39e56ebbda.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-bb6e9f39e56ebbda.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
Flyway 会尝试查找它的 schema 历史表，如果数据库是空的，Flyway 就不再查找，而是直接创建数据库。
现再你就有了一个仅包含一张空表的数据库，默认情况下，这张表叫 _flyway_schema_history_。
![image](http://upload-images.jianshu.io/upload_images/3101171-410eb31c6313b389.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-410eb31c6313b389.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
这张表将被用于追踪数据库的状态。
@ -82,17 +82,17 @@ Flyway 会尝试查找它的 schema 历史表，如果数据库是空的，Flywa
这些 **migrations** 将根据他们的版本号进行排序。
![image](http://upload-images.jianshu.io/upload_images/3101171-d36ee07ada4efbcd.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-d36ee07ada4efbcd.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
任意 migration 应用后，schema 历史表将更新。当元数据和初始状态替换后，可以称之为：迁移到新版本。
Flyway 一旦扫描了文件系统或应用 classpath 下的 migrations，这些 migrations 会检查 schema 历史表。如果它们的版本号低于或等于当前的版本，将被忽略。保留下来的 migrations 是等待的 migrations，有效但没有应用。
![image](http://upload-images.jianshu.io/upload_images/3101171-99a88fea7a31a070.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-99a88fea7a31a070.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
migrations 将根据版本号排序并按序执行。
![image](http://upload-images.jianshu.io/upload_images/3101171-b444fef6e5c13b71.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-b444fef6e5c13b71.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
## 快速上手
@ -405,7 +405,7 @@ migrations 最常用的编写形式就是 SQL。
为了被 Flyway 自动识别，SQL migrations 的文件命名必须遵循规定的模式：
![sql-migrations](https://raw.githubusercontent.com/dunwu/Database/master/images/flyway/sql-migrations.png)
<br><div align="center"><img src="https://raw.githubusercontent.com/dunwu/Database/master/images/flyway/sql-migrations.png"/></div><br>
- **Prefix** - `V` 代表 versioned migrations (可配置), `U` 代表 undo migrations (可配置)、 `R` 代表 repeatable migrations (可配置)
- **Version** - 版本号通过`.`(点)或`_`(下划线)分隔 (repeatable migrations 不需要)
@ -424,7 +424,7 @@ migrations 最常用的编写形式就是 SQL。
为了被 Flyway 自动识别，JAVA migrations 的文件命名必须遵循规定的模式：
![java-migrations](https://raw.githubusercontent.com/dunwu/Database/master/images/flyway/java-migrations.png)
<br><div align="center"><img src="https://raw.githubusercontent.com/dunwu/Database/master/images/flyway/java-migrations.png"/></div><br>
- **Prefix** - `V` 代表 versioned migrations (可配置), `U` 代表 undo migrations (可配置)、 `R` 代表 repeatable migrations (可配置)
- **Version** - 版本号通过`.`(点)或`_`(下划线)分隔 (repeatable migrations 不需要)
@ -447,13 +447,13 @@ Callbacks 可以用 SQL 或 JAVA 来实现。
SQL Callbacks 的命名规则为：event 名 + SQL migration。
如： `beforeMigrate.sql`, `beforeEachMigrate.sql`, `afterEachMigrate.sql` 等。
如： `beforeMigrate.sql`, `beforeEachMigrate.sql`, `afterEachMigrate.sql` 等。
SQL Callbacks 也可以包含描述（description）。这种情况下，SQL Callbacks 文件名 = event 名 + 分隔符 + 描述 + 后缀。例：`beforeRepair__vacuum.sql`
当同一个 event 有多个 SQL callbacks，将按照它们描述（description）的顺序执行。
> **注：** Flyway 也支持你配置的  `sqlMigrationSuffixes`。
> **注：** Flyway 也支持你配置的 `sqlMigrationSuffixes`。
##### JAVA Callbacks

102
docs/h2.md
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@ -36,11 +36,11 @@ H2 允许用户通过浏览器接口方式访问 SQL 数据库。
2. 启动方式：在 bin 目录下，双击 jar 包；执行 `java -jar h2*.jar`；执行脚本：`h2.bat` 或 `h2.sh`。
3. 在浏览器中访问：http://localhost:8082，应该可以看到下图中的页面：
![h2-console](https://raw.githubusercontent.com/dunwu/Database/master/images/h2/h2-console.png)
<br><div align="center"><img src="https://raw.githubusercontent.com/dunwu/Database/master/images/h2/h2-console.png"/></div><br>
点击 **Connect** ，可以进入操作界面：
![h2-console](https://raw.githubusercontent.com/dunwu/Database/master/images/h2/h2-console-02.png)
<br><div align="center"><img src="https://raw.githubusercontent.com/dunwu/Database/master/images/h2/h2-console-02.png"/></div><br>
操作界面十分简单，不一一细说。
@ -105,9 +105,9 @@ Datasource class: `org.h2.jdbcx.JdbcDataSource`
数据库持久化存储为单个文件。
连接字符串：`~/.h2/DBName` 表示数据库文件的存储位置，如果第一次连接则会自动创建数据库。
连接字符串：`\~/.h2/DBName` 表示数据库文件的存储位置，如果第一次连接则会自动创建数据库。
- `jdbc:h2:~/test` - 'test' 在用户根目录下
- `jdbc:h2:\~/test` - 'test' 在用户根目录下
- `jdbc:h2:/data/test` - 'test' 在 /data 目录下
- `jdbc:h2:test` - 'test' 在当前工作目录
@ -119,8 +119,8 @@ Datasource class: `org.h2.jdbcx.JdbcDataSource`
如果不指定 DBName，则以私有方式启动，只允许一个连接。
- `jdbc:h2:mem:test` -  一个进程中有多个连接
- `jdbc:h2:mem:` -  未命名的私有库，一个连接
- `jdbc:h2:mem:test` - 一个进程中有多个连接
- `jdbc:h2:mem:` - 未命名的私有库，一个连接
#### 服务模式
@ -132,7 +132,7 @@ H2 支持三种服务模式：
启动 tcp 服务连接字符串示例：
- `jdbc:h2:tcp://localhost/~/test` - 用户根目录
- `jdbc:h2:tcp://localhost/\~/test` - 用户根目录
- `jdbc:h2:tcp://localhost//data/test` - 绝对路径
#### 启动服务
@ -155,8 +155,8 @@ java -cp h2*.jar org.h2.tools.Server -?
#### 设置
- `jdbc:h2:..;MODE=MySQL`  兼容模式（或 HSQLDB 等）
- `jdbc:h2:..;TRACE_LEVEL_FILE=3`  记录到 `*.trace.db`
- `jdbc:h2:..;MODE=MySQL` 兼容模式（或 HSQLDB 等）
- `jdbc:h2:..;TRACE_LEVEL_FILE=3` 记录到 `*.trace.db`
#### 连接字符串参数
@ -272,184 +272,184 @@ java -jar h2-1.3.168.jar -web -webPort 8090 -browser
### SELECT
![SELECT](http://upload-images.jianshu.io/upload_images/3101171-a3f90c0d1f1f3437.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-a3f90c0d1f1f3437.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### INSERT
![INSERT](http://upload-images.jianshu.io/upload_images/3101171-6a92ae4362c3468a.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-6a92ae4362c3468a.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### UPDATE
![UPDATE](http://upload-images.jianshu.io/upload_images/3101171-dddf0e26995d46c3.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-dddf0e26995d46c3.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### DELETE
![DELETE](http://upload-images.jianshu.io/upload_images/3101171-96e72023445a6fd6.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-96e72023445a6fd6.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### BACKUP
![BACKUP](http://upload-images.jianshu.io/upload_images/3101171-6267894d24fab47f.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-6267894d24fab47f.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### EXPLAIN
![EXPLAIN](http://upload-images.jianshu.io/upload_images/3101171-bbed6bb69f998b7a.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-bbed6bb69f998b7a.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
7、MERGE
![](http://upload-images.jianshu.io/upload_images/3101171-bd021648431d12a7.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-bd021648431d12a7.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### RUNSCRIPT
运行 sql 脚本文件
![RUNSCRIPT](http://upload-images.jianshu.io/upload_images/3101171-d6fe03eff0037e14.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-d6fe03eff0037e14.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### SCRIPT
根据数据库创建 sql 脚本
![SCRIPT](http://upload-images.jianshu.io/upload_images/3101171-9ba7547ab8bcaeab.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-9ba7547ab8bcaeab.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### SHOW
![SHOW](http://upload-images.jianshu.io/upload_images/3101171-67449c6cc5cbb8c1.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-67449c6cc5cbb8c1.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### ALTER
#### ALTER INDEX RENAME
![ALTER INDEX RENAME](http://upload-images.jianshu.io/upload_images/3101171-230bd3f97e185d2f.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-230bd3f97e185d2f.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
#### ALTER SCHEMA RENAME
![ALTER SCHEMA RENAME](http://upload-images.jianshu.io/upload_images/3101171-797a028938e46ba3.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-797a028938e46ba3.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
#### ALTER SEQUENCE
![ALTER SEQUENCE](http://upload-images.jianshu.io/upload_images/3101171-46f343da1b6c6a29.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-46f343da1b6c6a29.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
#### ALTER TABLE
![ALTER TABLE](http://upload-images.jianshu.io/upload_images/3101171-7e146a4010f2f357.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-7e146a4010f2f357.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
##### 增加约束
![增加约束](http://upload-images.jianshu.io/upload_images/3101171-4e5605a9c87a79cb.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-4e5605a9c87a79cb.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
##### 修改列
![修改列](http://upload-images.jianshu.io/upload_images/3101171-fbc1358c553e6614.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-fbc1358c553e6614.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
##### 删除列
![删除列](http://upload-images.jianshu.io/upload_images/3101171-dc3b897413700981.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-dc3b897413700981.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
##### 删除序列
![删除序列](http://upload-images.jianshu.io/upload_images/3101171-ec83899cb8724966.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-ec83899cb8724966.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
#### ALTER USER
##### 修改用户名
![修改用户名](http://upload-images.jianshu.io/upload_images/3101171-a1e429c0d8ece66c.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-a1e429c0d8ece66c.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
##### 修改用户密码
![修改用户密码](http://upload-images.jianshu.io/upload_images/3101171-5b86f98796606e54.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-5b86f98796606e54.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
#### ALTER VIEW
![ALTER VIEW](http://upload-images.jianshu.io/upload_images/3101171-8832ecbc2db63a13.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-8832ecbc2db63a13.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### COMMENT
![COMMENT](http://upload-images.jianshu.io/upload_images/3101171-467ce031883f0020.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-467ce031883f0020.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### CREATE CONSTANT
![CREATE CONSTANT](http://upload-images.jianshu.io/upload_images/3101171-1231c83563bfec9c.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-1231c83563bfec9c.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### CREATE INDEX
![CREATE INDEX](http://upload-images.jianshu.io/upload_images/3101171-d66d59bd7803d5c1.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-d66d59bd7803d5c1.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### CREATE ROLE
![CREATE ROLE](http://upload-images.jianshu.io/upload_images/3101171-7df1dee098e1127b.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-7df1dee098e1127b.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### CREATE SCHEMA
![CREATE SCHEMA](http://upload-images.jianshu.io/upload_images/3101171-c485123c62c0866e.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-c485123c62c0866e.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### CREATE SEQUENCE
![CREATE SEQUENCE](http://upload-images.jianshu.io/upload_images/3101171-cc25860776d361ae.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-cc25860776d361ae.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### CREATE TABLE
![CREATE TABLE](http://upload-images.jianshu.io/upload_images/3101171-36ffc66327df8b5b.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-36ffc66327df8b5b.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### CREATE TRIGGER
![CREATE TRIGGER](http://upload-images.jianshu.io/upload_images/3101171-9a7bfa4425281213.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-9a7bfa4425281213.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### CREATE USER
![CREATE USER](http://upload-images.jianshu.io/upload_images/3101171-a1e45e308be6dac3.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-a1e45e308be6dac3.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### CREATE VIEW
![CREATE VIEW](http://upload-images.jianshu.io/upload_images/3101171-45c4cd516fd36611.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-45c4cd516fd36611.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### DROP
![DROP](http://upload-images.jianshu.io/upload_images/3101171-52a3562d76411811.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-52a3562d76411811.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### GRANT RIGHT
给 schema 授权授权
![授权](http://upload-images.jianshu.io/upload_images/3101171-750e96ceff00c4ee.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-750e96ceff00c4ee.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
给 schema 授权给 schema 授权
![给schema授权](http://upload-images.jianshu.io/upload_images/3101171-22cfd65c2ff1eea5.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-22cfd65c2ff1eea5.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
#### 复制角色的权限
![复制角色的权限](http://upload-images.jianshu.io/upload_images/3101171-6cba2f1585fd913b.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-6cba2f1585fd913b.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### REVOKE RIGHT
#### 移除授权
![移除授权](http://upload-images.jianshu.io/upload_images/3101171-3f905669cbb331b7.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-3f905669cbb331b7.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
#### 移除角色具有的权限
![移除角色具有的权限](http://upload-images.jianshu.io/upload_images/3101171-af77f495222f1b30.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-af77f495222f1b30.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### ROLLBACK
#### 从某个还原点（savepoint）回滚
![](http://upload-images.jianshu.io/upload_images/3101171-c71a226ac4fff913.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-c71a226ac4fff913.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
#### 回滚事务
![](http://upload-images.jianshu.io/upload_images/3101171-efb65c504c7d69c2.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-efb65c504c7d69c2.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
#### 创建 savepoint
![](http://upload-images.jianshu.io/upload_images/3101171-feefdc236d4b211d.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-feefdc236d4b211d.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
## 数据类型
![数据类型](http://upload-images.jianshu.io/upload_images/3101171-52296dd53249cdae.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-52296dd53249cdae.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
### INT Type
![INT Type](http://upload-images.jianshu.io/upload_images/3101171-fe62e3d07eb93d11.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
<br><div align="center"><img src="http://upload-images.jianshu.io/upload_images/3101171-fe62e3d07eb93d11.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240"/></div><br>
## 集群

4
docs/postgresql.md
View File

@ -4,7 +4,7 @@
>
> 关键词：Database, RDBM, psql
![](http://oyz7npk35.bkt.clouddn.com/images/20180920181010182614.png)
<br><div align="center"><img src="http://oyz7npk35.bkt.clouddn.com/images/20180920181010182614.png"/></div><br>
<!-- TOC depthFrom:2 depthTo:3 -->
@ -26,7 +26,7 @@
官方下载页面要求用户选择相应版本，然后动态的给出安装提示，如下图所示：
![](http://oyz7npk35.bkt.clouddn.com/images/20180920181010174348.png)
<br><div align="center"><img src="http://oyz7npk35.bkt.clouddn.com/images/20180920181010174348.png"/></div><br>
前 3 步要求用户选择，后 4 步是根据选择动态提示的安装步骤

2
docs/redis/Redis事件.md
View File

@ -81,4 +81,4 @@ def main():
<div align="center">
<img src="https://raw.githubusercontent.com/dunwu/database/master/images/redis/Redis事件的调度与执行.png" />
</div>
</div>