diff --git a/examples/db-problems-demo/.gitignore b/examples/db-problems-demo/.gitignore
deleted file mode 100644
index 549e00a2..00000000
--- a/examples/db-problems-demo/.gitignore
+++ /dev/null
@@ -1,33 +0,0 @@
-HELP.md
-target/
-!.mvn/wrapper/maven-wrapper.jar
-!**/src/main/**/target/
-!**/src/test/**/target/
-
-### STS ###
-.apt_generated
-.classpath
-.factorypath
-.project
-.settings
-.springBeans
-.sts4-cache
-
-### IntelliJ IDEA ###
-.idea
-*.iws
-*.iml
-*.ipr
-
-### NetBeans ###
-/nbproject/private/
-/nbbuild/
-/dist/
-/nbdist/
-/.nb-gradle/
-build/
-!**/src/main/**/build/
-!**/src/test/**/build/
-
-### VS Code ###
-.vscode/
diff --git a/examples/db-problems-demo/pom.xml b/examples/db-problems-demo/pom.xml
deleted file mode 100644
index eec2be97..00000000
--- a/examples/db-problems-demo/pom.xml
+++ /dev/null
@@ -1,79 +0,0 @@
-
-
- 4.0.0
-
- org.springframework.boot
- spring-boot-starter-parent
- 2.3.4.RELEASE
-
-
- ru.otus
- db-problems-demo
- 0.0.1-SNAPSHOT
- db-problems-demo
- Demo project for Db usage problems
-
-
- 11
-
-
-
-
- org.springframework.boot
- spring-boot-starter-jdbc
-
-
-
- org.springframework.boot
- spring-boot-starter-thymeleaf
-
-
-
- org.springframework.boot
- spring-boot-starter-web
-
-
-
- org.flywaydb
- flyway-core
-
-
-
- com.h2database
- h2
- 1.4.200
- test
-
-
-
- org.postgresql
- postgresql
- 42.2.17
-
-
-
-
-
- org.springframework.boot
- spring-boot-starter-test
- test
-
-
- org.junit.vintage
- junit-vintage-engine
-
-
-
-
-
-
-
-
- org.springframework.boot
- spring-boot-maven-plugin
-
-
-
-
-
diff --git a/examples/db-problems-demo/readme.md b/examples/db-problems-demo/readme.md
deleted file mode 100644
index d70fff70..00000000
--- a/examples/db-problems-demo/readme.md
+++ /dev/null
@@ -1 +0,0 @@
-Проект с миграцией для демонстрации того, как выглядит джойн нескольких таблиц при связи "многие-ко-многим"
\ No newline at end of file
diff --git a/examples/db-problems-demo/src/main/java/db/migration/R__0002_Add_books.java b/examples/db-problems-demo/src/main/java/db/migration/R__0002_Add_books.java
deleted file mode 100644
index 84e9608b..00000000
--- a/examples/db-problems-demo/src/main/java/db/migration/R__0002_Add_books.java
+++ /dev/null
@@ -1,60 +0,0 @@
-package db.migration;
-
-import org.flywaydb.core.api.migration.BaseJavaMigration;
-import org.flywaydb.core.api.migration.Context;
-import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
-import org.springframework.jdbc.core.namedparam.NamedParameterJdbcOperations;
-import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
-import org.springframework.jdbc.datasource.SingleConnectionDataSource;
-
-import javax.sql.DataSource;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Map;
-
-@SuppressWarnings("unchecked")
-public class R__0002_Add_books extends BaseJavaMigration {
-
- public static final int BOOKS_COUNT = 100_000;
-
- @Override
- public void migrate(Context context) throws Exception {
- DataSource ds = new SingleConnectionDataSource(context.getConnection(), true);
- NamedParameterJdbcOperations jdbc = new NamedParameterJdbcTemplate(ds);
-
- insertBooks(jdbc);
- insertBooksRelations(jdbc);
- }
-
- private void insertBooks(NamedParameterJdbcOperations jdbc) {
- List