diff --git a/lab-20/lab-20-database-version-control-flyway/pom.xml b/lab-20/lab-20-database-version-control-flyway/pom.xml
index faaa9fa3..c243f384 100644
--- a/lab-20/lab-20-database-version-control-flyway/pom.xml
+++ b/lab-20/lab-20-database-version-control-flyway/pom.xml
@@ -14,6 +14,7 @@
 
     <dependencies>
         <!-- 实现对数据库连接池的自动化配置 -->
+        <!-- 同时，spring-boot-starter-jdbc 支持 Flyway 的自动化配置 -->
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-jdbc</artifactId>
@@ -24,10 +25,10 @@
             <version>5.1.48</version>
         </dependency>
 
+        <!-- Flyway 依赖 -->
         <dependency>
             <groupId>org.flywaydb</groupId>
             <artifactId>flyway-core</artifactId>
-            <version>5.2.4</version>
         </dependency>
     </dependencies>
 
diff --git a/lab-20/lab-20-database-version-control-flyway/src/main/java/cn/iocoder/springboot/lab20/databaseversioncontrol/migration/ExampleFlywayCallback.java b/lab-20/lab-20-database-version-control-flyway/src/main/java/cn/iocoder/springboot/lab20/databaseversioncontrol/migration/ExampleFlywayCallback.java
new file mode 100644
index 00000000..659392f9
--- /dev/null
+++ b/lab-20/lab-20-database-version-control-flyway/src/main/java/cn/iocoder/springboot/lab20/databaseversioncontrol/migration/ExampleFlywayCallback.java
@@ -0,0 +1,30 @@
+package cn.iocoder.springboot.lab20.databaseversioncontrol.migration;
+
+import org.flywaydb.core.api.callback.Callback;
+import org.flywaydb.core.api.callback.Context;
+import org.flywaydb.core.api.callback.Event;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Component;
+
+@Component
+public class ExampleFlywayCallback implements Callback {
+
+    private Logger log = LoggerFactory.getLogger(getClass());
+
+    @Override
+    public boolean supports(Event event, Context context) {
+        return true;
+    }
+
+    @Override
+    public boolean canHandleInTransaction(Event event, Context context) {
+        return false;
+    }
+
+    @Override
+    public void handle(Event event, Context context) {
+        log.info("event: {}", event);
+    }
+
+}
diff --git a/lab-20/lab-20-database-version-control-flyway/src/main/java/cn/iocoder/springboot/lab20/databaseversioncontrol/migration/V1_1__FixUsername.java b/lab-20/lab-20-database-version-control-flyway/src/main/java/cn/iocoder/springboot/lab20/databaseversioncontrol/migration/V1_1__FixUsername.java
new file mode 100644
index 00000000..74b9a3d3
--- /dev/null
+++ b/lab-20/lab-20-database-version-control-flyway/src/main/java/cn/iocoder/springboot/lab20/databaseversioncontrol/migration/V1_1__FixUsername.java
@@ -0,0 +1,55 @@
+package cn.iocoder.springboot.lab20.databaseversioncontrol.migration;
+
+import org.flywaydb.core.api.MigrationVersion;
+import org.flywaydb.core.api.migration.BaseJavaMigration;
+import org.flywaydb.core.api.migration.Context;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.jdbc.core.RowCallbackHandler;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public class V1_1__FixUsername extends BaseJavaMigration {
+
+    private Logger logger = LoggerFactory.getLogger(getClass());
+
+    @Override
+    public void migrate(Context context) throws Exception {
+        // 创建 JdbcTemplate ，方便 JDBC 操作
+        JdbcTemplate template = new JdbcTemplate(context.getConfiguration().getDataSource());
+        // 查询所有用户，如果用户名为 yudaoyuanma ，则变更成 yutou
+        template.query("SELECT id, username, password, create_time FROM users", new RowCallbackHandler() {
+            @Override
+            public void processRow(ResultSet rs) throws SQLException {
+                // 遍历返回的结果
+                do {
+                    String username = rs.getString("username");
+                    if ("yudaoyuanma".equals(username)) {
+                        Integer id = rs.getInt("id");
+                        template.update("UPDATE users SET username = ? WHERE id = ?",
+                                "yutou", id);
+                        logger.info("[migrate][更新 user({}) 的用户名({} => {})", id, username, "yutou");
+                    }
+                } while (rs.next());
+            }
+        });
+    }
+
+    @Override
+    public Integer getChecksum() {
+        return 11; // 默认返回，是 null 。
+    }
+
+    @Override
+    public boolean canExecuteInTransaction() {
+        return true; // 默认返回，也是 true
+    }
+
+    @Override
+    public MigrationVersion getVersion() {
+        return super.getVersion(); // 默认按照约定的规则，从类名中解析获得。可以自定义
+    }
+
+}
diff --git a/lab-20/lab-20-database-version-control-flyway/src/main/resources/application.yaml b/lab-20/lab-20-database-version-control-flyway/src/main/resources/application.yaml
index c4041265..ff316839 100644
--- a/lab-20/lab-20-database-version-control-flyway/src/main/resources/application.yaml
+++ b/lab-20/lab-20-database-version-control-flyway/src/main/resources/application.yaml
@@ -1,15 +1,18 @@
 spring:
   # datasource 数据源配置内容，对应 DataSourceProperties 配置属性类
   datasource:
-    url: jdbc:mysql://127.0.0.1:3306/lab-19-flyway?useSSL=false&useUnicode=true&characterEncoding=UTF-8
+    url: jdbc:mysql://127.0.0.1:3306/lab-20-flyway?useSSL=false&useUnicode=true&characterEncoding=UTF-8
     driver-class-name: com.mysql.jdbc.Driver
     username: root # 数据库账号
     password: # 数据库密码
-
+  # flyway 配置内容，对应 FlywayAutoConfiguration.FlywayConfiguration 配置项
   flyway:
-    enabled: true
-    baseline-on-migrate: true
-    locations: classpath:db/migration
-    url: jdbc:mysql://127.0.0.1:3306/lab-19-flyway?useSSL=false&useUnicode=true&characterEncoding=UTF-8
-    username: root
-    password:
+    enabled: true # 开启 Flyway 功能
+    cleanDisabled: true # 禁用 Flyway 所有的 drop 相关的逻辑，避免出现跑路的情况。
+    locations: # 迁移脚本目录
+      - classpath:db/migration # 配置 SQL-based 的 SQL 脚本在该目录下
+      - classpath:cn.iocoder.springboot.lab20.databaseversioncontrol.migration # 配置 Java-based 的 Java 文件在该目录下
+    check-location: false # 是否校验迁移脚本目录下。如果配置为 true ，代表需要校验。此时，如果目录下没有迁移脚本，会抛出 IllegalStateException 异常
+    url: jdbc:mysql://127.0.0.1:3306/lab-20-flyway?useSSL=false&useUnicode=true&characterEncoding=UTF-8 # 数据库地址
+    user: root # 数据库账号
+    password: # 数据库密码
diff --git a/lab-20/lab-20-database-version-control-flyway/src/main/resources/db/migration/V1.0__INIT_DB.sql b/lab-20/lab-20-database-version-control-flyway/src/main/resources/db/migration/V1.0__INIT_DB.sql
index 02a9b8eb..10a494ab 100644
--- a/lab-20/lab-20-database-version-control-flyway/src/main/resources/db/migration/V1.0__INIT_DB.sql
+++ b/lab-20/lab-20-database-version-control-flyway/src/main/resources/db/migration/V1.0__INIT_DB.sql
@@ -1,3 +1,4 @@
+-- 创建用户表
 CREATE TABLE `users` (
   `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '用户编号',
   `username` varchar(64) COLLATE utf8mb4_bin DEFAULT NULL COMMENT '账号',
@@ -6,3 +7,6 @@ CREATE TABLE `users` (
   PRIMARY KEY (`id`),
   UNIQUE KEY `idx_username` (`username`)
 ) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;
+
+-- 插入一条数据
+INSERT INTO `users`(username, password, create_time) VALUES('yudaoyuanma', 'password', now());
diff --git a/lab-20/lab-20-database-version-control-liquibase/pom.xml b/lab-20/lab-20-database-version-control-liquibase/pom.xml
new file mode 100644
index 00000000..4e978c99
--- /dev/null
+++ b/lab-20/lab-20-database-version-control-liquibase/pom.xml
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.1.3.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>lab-20-database-version-control-liquibase</artifactId>
+
+    <dependencies>
+        <!-- 实现对数据库连接池的自动化配置 -->
+        <!-- 同时，spring-boot-starter-jdbc 支持 Liquibase 的自动化配置 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jdbc</artifactId>
+        </dependency>
+        <dependency> <!-- 本示例，我们使用 MySQL -->
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+<!--            <version>5.1.48</version>-->
+        </dependency>
+
+        <!-- Liquibase 依赖 -->
+        <dependency>
+            <groupId>org.liquibase</groupId>
+            <artifactId>liquibase-core</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>
diff --git a/lab-20/lab-20-database-version-control-liquibase/src/main/java/cn/iocoder/springboot/lab20/databaseversioncontrol/Application.java b/lab-20/lab-20-database-version-control-liquibase/src/main/java/cn/iocoder/springboot/lab20/databaseversioncontrol/Application.java
new file mode 100644
index 00000000..ebb6f948
--- /dev/null
+++ b/lab-20/lab-20-database-version-control-liquibase/src/main/java/cn/iocoder/springboot/lab20/databaseversioncontrol/Application.java
@@ -0,0 +1,14 @@
+package cn.iocoder.springboot.lab20.databaseversioncontrol;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        // 启动 Spring Boot 应用
+        SpringApplication.run(Application.class, args);
+    }
+
+}
diff --git a/lab-20/lab-20-database-version-control-liquibase/src/main/java/cn/iocoder/springboot/lab20/databaseversioncontrol/migration/CHANGE_SET_3_FixUsername.java b/lab-20/lab-20-database-version-control-liquibase/src/main/java/cn/iocoder/springboot/lab20/databaseversioncontrol/migration/CHANGE_SET_3_FixUsername.java
new file mode 100644
index 00000000..c331cf7b
--- /dev/null
+++ b/lab-20/lab-20-database-version-control-liquibase/src/main/java/cn/iocoder/springboot/lab20/databaseversioncontrol/migration/CHANGE_SET_3_FixUsername.java
@@ -0,0 +1,57 @@
+package cn.iocoder.springboot.lab20.databaseversioncontrol.migration;
+
+import liquibase.change.custom.CustomTaskChange;
+import liquibase.database.Database;
+import liquibase.database.jvm.JdbcConnection;
+import liquibase.exception.CustomChangeException;
+import liquibase.exception.SetupException;
+import liquibase.exception.ValidationErrors;
+import liquibase.resource.ResourceAccessor;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+
+public class CHANGE_SET_3_FixUsername implements CustomTaskChange {
+
+    private Logger logger = LoggerFactory.getLogger(getClass());
+
+    @Override
+    public void execute(Database database) throws CustomChangeException {
+        JdbcConnection connection = (JdbcConnection) database.getConnection();
+        try (PreparedStatement psmt = connection.prepareStatement("SELECT id, username, password, create_time FROM users")) {
+            try (ResultSet rs = psmt.executeQuery()) {
+                while (rs.next()) {
+                    String username = rs.getString("username");
+                    if ("yudaoyuanma".equals(username)) {
+                        Integer id = rs.getInt("id");
+                        // 这里，再来一刀更新操作，偷懒不写了。
+                        logger.info("[migrate][更新 user({}) 的用户名({} => {})", id, username, "yutou");
+                    }
+                }
+            }
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @Override
+    public String getConfirmationMessage() {
+        return null;
+    }
+
+    @Override
+    public void setUp() throws SetupException {
+    }
+
+    @Override
+    public void setFileOpener(ResourceAccessor resourceAccessor) {
+    }
+
+    @Override
+    public ValidationErrors validate(Database database) {
+        return null;
+    }
+
+}
diff --git a/lab-20/lab-20-database-version-control-liquibase/src/main/resources/application.yaml b/lab-20/lab-20-database-version-control-liquibase/src/main/resources/application.yaml
new file mode 100644
index 00000000..eb76689b
--- /dev/null
+++ b/lab-20/lab-20-database-version-control-liquibase/src/main/resources/application.yaml
@@ -0,0 +1,14 @@
+spring:
+  # datasource 数据源配置内容，对应 DataSourceProperties 配置属性类
+  datasource:
+    url: jdbc:mysql://127.0.0.1:3306/lab-20-liquibase?useSSL=false&useUnicode=true&characterEncoding=UTF-8
+    driver-class-name: com.mysql.jdbc.Driver
+    username: root # 数据库账号
+    password: # 数据库密码
+  # Liquibase 配置内容，对应 LiquibaseProperties 配置项
+  liquibase:
+    enabled: true # 开启 Liquibase 功能。默认为 true 。
+    change-log: classpath:/db/changelog/db.changelog-master.yaml # Liquibase 配置文件地址
+    url: jdbc:mysql://127.0.0.1:3306/lab-20-liquibase?useSSL=false&useUnicode=true&characterEncoding=UTF-8 # 数据库地址
+    user: root # 数据库账号
+    password: # 数据库密码
diff --git a/lab-20/lab-20-database-version-control-liquibase/src/main/resources/db/changelog/db.changelog-master-bak.yaml b/lab-20/lab-20-database-version-control-liquibase/src/main/resources/db/changelog/db.changelog-master-bak.yaml
new file mode 100644
index 00000000..7935ec2f
--- /dev/null
+++ b/lab-20/lab-20-database-version-control-liquibase/src/main/resources/db/changelog/db.changelog-master-bak.yaml
@@ -0,0 +1 @@
+databaseChangeLog:
diff --git a/lab-20/lab-20-database-version-control-liquibase/src/main/resources/db/changelog/db.changelog-master.yaml b/lab-20/lab-20-database-version-control-liquibase/src/main/resources/db/changelog/db.changelog-master.yaml
new file mode 100644
index 00000000..64e9f4bc
--- /dev/null
+++ b/lab-20/lab-20-database-version-control-liquibase/src/main/resources/db/changelog/db.changelog-master.yaml
@@ -0,0 +1,62 @@
+databaseChangeLog:
+  - changeSet: # 对应一个 ChangeSet 对象
+      id: 0 # ChangeSet 编号
+      author: yunai # 作者
+      comments: 空 # 备注
+  - changeSet: # 对应一个 ChangeSet 对象
+      id: 1 # ChangeSet 编号
+      author: yunai # 作者
+      comments: 初始化 users 表 # 备注
+      changes: # 对应 Change 数组。Change 是一个接口，每种操作对应一种 Change 实现类
+        - createTable: # 创建表，对应 CreateTableChange 对象。
+            tableName: users # 表名
+            remarkds: 用户表 # 表注释
+            columns: # 对应 ColumnConfig 数组
+              - column:
+                  name: id # 字段名
+                  type: int # 字段类型
+                  autoIncrement: true # 自增
+                  constraints: # 限制条件，对应一个 ConstraintsConfig 对象
+                    primaryKey: true # 主键
+                    nullable: false # 不允许空
+              - column:
+                  name: username
+                  type: varchar(64)
+                  constraints:
+                    nullable: false
+              - column:
+                  name: password
+                  type: varchar(32)
+                  constraints:
+                    nullable: false
+              - column:
+                  name: create_time
+                  type: datetime
+                  constraints:
+                    nullable: false
+        - insert: # 插入记录，对应 InsertDataChange 对象。
+            tableName: users # 表名
+            columns: # 对应 ColumnConfig 数组
+              - column:
+                  name: username # 字段名
+                  value: yudaoyuanma # 值
+              - column:
+                  name: password
+                  value: password
+              - column:
+                  name: create_time
+                  value: now()
+  - changeSet: # 对应一个 ChangeSet 对象
+      id: 2 # ChangeSet 编号
+      author: yunai # 作者
+      comments: 初始化 users2 表 # 备注
+      changes: # 对应 Change 数组。Change 是一个接口，每种操作对应一种 Change 实现类
+        - sqlFile: # 使用 SQL 文件，对应 SQLFileChange 对象
+            encoding: utf8
+            path: classpath:db/changelog/sqlfile/CHAGE_SET_2_INIT_DB.sql
+  - changeSet: # 对应一个 ChangeSet 对象
+      id: 3 # ChangeSet 编号
+      author: yunai # 作者
+      comments: 修复 `users` 的用户名 # 备注
+      changes: # 对应 Change 数组。Change 是一个接口，每种操作对应一种 Change 实现类
+        - customChange: {class: cn.iocoder.springboot.lab20.databaseversioncontrol.migration.CHANGE_SET_3_FixUsername} # 对应 CustomTaskChange
diff --git a/lab-20/lab-20-database-version-control-liquibase/src/main/resources/db/changelog/sqlfile/CHAGE_SET_2_INIT_DB.sql b/lab-20/lab-20-database-version-control-liquibase/src/main/resources/db/changelog/sqlfile/CHAGE_SET_2_INIT_DB.sql
new file mode 100644
index 00000000..327cdcf1
--- /dev/null
+++ b/lab-20/lab-20-database-version-control-liquibase/src/main/resources/db/changelog/sqlfile/CHAGE_SET_2_INIT_DB.sql
@@ -0,0 +1,12 @@
+-- 创建用户表
+CREATE TABLE `users2` (
+  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '用户编号',
+  `username` varchar(64) COLLATE utf8mb4_bin DEFAULT NULL COMMENT '账号',
+  `password` varchar(32) COLLATE utf8mb4_bin DEFAULT NULL COMMENT '密码',
+  `create_time` datetime DEFAULT NULL COMMENT '创建时间',
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `idx_username` (`username`)
+) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;
+
+-- 插入一条数据
+INSERT INTO `users2`(username, password, create_time) VALUES('yudaoyuanma', 'password', now());
diff --git a/lab-20/pom.xml b/lab-20/pom.xml
index 8403ca71..5d21b3b7 100644
--- a/lab-20/pom.xml
+++ b/lab-20/pom.xml
@@ -14,6 +14,7 @@
     <modules>
         <module>lab-20-database-version-control</module>
         <module>lab-20-database-version-control-flyway</module>
+        <module>lab-20-database-version-control-liquibase</module>
     </modules>