diff --git a/.gitignore b/.gitignore
index 2ff966f..1a6ec5a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -63,5 +63,7 @@ typings/
 
 .venv
 
+__pycache__
+
 # mac
 .DS_Store
diff --git a/content/posts/create-and-drop-table.md b/content/posts/create-and-drop-table.md
index 537c93e..f0f1d3c 100644
--- a/content/posts/create-and-drop-table.md
+++ b/content/posts/create-and-drop-table.md
@@ -3,9 +3,11 @@ title: "Create and Drop Table"
 date: 2023-09-17T01:06:01+03:30
 ---
 
-## PostgreSQL
 ### Create table
 By using `CREATE TABLE` statement you can create a new table.
+
+{{< tabs tabTotal="1" >}}
+{{< tab tabName="PostgreSQL" >}}
 ```sql
 -- Create a table called users
 CREATE TABLE users (
@@ -27,8 +29,14 @@ CREATE TABLE users (
 [PostgreSQL create table](https://www.postgresql.org/docs/16/sql-createtableas.html)  
 [PostgreSQL data types](https://www.postgresql.org/docs/8.1/datatype.html#DATATYPE-TABLE)  
 
+{{< /tab >}}
+{{< /tabs >}}
+
 ## Remove table
 Use `DROP TABLE` to destroy a table.
+
+{{< tabs tabTotal="1" >}}
+{{< tab tabName="PostgreSQL" >}}
 ```sql
 -- drop table coffee
 DROP TABLE coffee;
@@ -41,3 +49,5 @@ DROP TABLE coffee CASCADE;
 ```
 [PostgreSQL docs for more info.](https://www.postgresql.org/docs/16/sql-droptable.html)  
 
+{{< /tab >}}
+{{< /tabs >}}
diff --git a/content/posts/sample-database-structure.md b/content/posts/sample-database-structure.md
index acc9202..932ef06 100644
--- a/content/posts/sample-database-structure.md
+++ b/content/posts/sample-database-structure.md
@@ -4,15 +4,15 @@ date: 2023-09-15T16:23:58+03:30
 draft: false
 ---
 
-This is an overview of sample database that you imported from [setup]() post.
+This is an overview of sample database that you imported from [setup](/posts/setup/) post.
 
 ## Overview
 We're assuming that we have an eCommerce website and have some tables 
-like, users, products, orders, and users_log.
+like, users, product_categories, products, orders, and user_logs.
 
 ### Users table
 Users table have the following structure.  
-
+table name: users
 |column |type |
 |---|---|
 id |int
@@ -20,31 +20,78 @@ datetime_joined |datetime
 first_name |varchar
 last_name |varchar
 email |varchar
-username |varchar
+city |varchar
 active |boolean
 
 Sample data:  
-|id |datetime_joined |first_name |last_name |email |username |active |
+|id |datetime_joined |first_name |last_name |email |city |active |
 |---|---|---|---|---|---|---|
-|1 |2023-03-07 12:45:12.231069+00 |John|Doe |john@sbe.com |john_doe | true
+|1 |2023-03-07 12:45:12.231069+00 |John|Doe |john@sbe.com |West Misty | true
 
 
-### Products table
-Products table have the following structure.  
+### Product categories
+table name: product_categories
+|column |type |
+|---|---|
+id |int
+name |varchar
 
+Sample data:  
+|id |name |
+|---|---|
+|1 |Oil Paint 
+
+
+### Products table
+table name: products
 |column |type |
 |---|---|
 id |int
 created_at |datetime
+product_code |varchar
 name |varchar
+company |varchar
 price |int
-category |foreign key
-description |varchar
-sale_price |int / nullable
+category_id |int - foreign key
+description |text
 
 Sample data:  
-|id |datetime_joined |first_name |last_name |email |username |active |
-|---|---|---|---|---|---|---|
-|1 |2023-03-07 12:45:12.231069+00 |John|Doe |john@sbe.com |john_doe | true
+|id |created_at |product_code |name |company |price |category_id |description |
+|---|---|---|---|---|---|---|---|
+|1 |2023-09-01 23:59:14 |30248960 |teal paint |Burke, Payne and Oliver |427 |1 |Score finally...
 
 
+### Orders table
+table name: orders
+|column |type |
+|---|---|
+id |int
+created_at |datetime
+order_code |varchar
+product_id |int - foreign key
+user_id |int - foreign key
+quantity |int
+total_price |int
+delivered |boolean
+
+Sample data:  
+|id |created_at |order_code |product_id |user_id |quantity |total_price |delivered |
+|---|---|---|---|---|---|---|---|
+|1 |2022-10-08 17:50:42 |28e9fe61-8883-4933-bc48-b4cd292cf501 |17 |480 |6 |2532 |True
+
+
+### User logs table
+table name: user_logs
+|column |type |
+|---|---|
+id |int
+user_email |varchar
+datetime |datetime
+ip_address |varchar
+page_visited |text
+user_agent |text
+
+Sample data:  
+|id |user_email |datetime |ip_address |page_visited |user_agent |
+|---|---|---|---|---|---|
+|1 |marilyn05@hotmail.com |2023-06-25 11:04:28 |116.0.78.131 |blog/ |Mozilla/5.0 (Windows; U; Windows CE)...
diff --git a/content/posts/setup.md b/content/posts/setup.md
index 7846d4e..8746898 100644
--- a/content/posts/setup.md
+++ b/content/posts/setup.md
@@ -8,14 +8,13 @@ If you want to run the examples in the following posts, you can
 follow these instructions to setup your environment and import 
 our sample data to work with.
 
-## PostgreSQL
-If you have PostgreSQL installed, you can skip step 1 and 2.
+{{< tabs tabTotal="1" >}}
+{{< tab tabName="PostgreSQL" >}}
+If you have PostgreSQL installed, you can skip step 1.
 
-### 1: Install docker and docker compose
+### 1: Run PostgreSQL
 You can download and install docker and docker compose from 
 [docker website](https://www.docker.com/).  
-
-### 2: Run PostgreSQL
 Create a `docker-compose.yml` file:  
 ```yaml
 version: '3'
@@ -35,9 +34,25 @@ services:
 volumes:
   postgres_data:
 ```
-Then, run:
+Then, run:  
 ```bash
 docker compose up -d
+# or
+docker-compose up -d
 ```
 
-### 3: Import sample database
+### 2: Import data
+Run this command to import backup into your PostgreSQL database.
+```bash
+# download backup file
+wget https://raw.githubusercontent.com/peymanslh/sql/main/scripts/backups/sbe.pgsql
+
+# import data
+cat sbe.pgsql | docker exec -i `docker ps -q --filter name=postgres` psql -U sbe sbe
+# or, if you don't use docker
+psql -U sbe sbe < sbe.pgsql
+```
+You can download `sbe.pgsql` backup file from [GitHub](https://github.com/peymanslh/sql/tree/main/scripts/backups) 
+or generate more data with scripts we provided in [`scripts` directory](https://github.com/peymanslh/sql/tree/main/scripts).  
+{{< /tab >}}
+{{< /tabs >}}
diff --git a/scripts/__pycache__/data_generator.cpython-311.pyc b/scripts/__pycache__/data_generator.cpython-311.pyc
deleted file mode 100644
index a2e266d..0000000
Binary files a/scripts/__pycache__/data_generator.cpython-311.pyc and /dev/null differ