Group-based ownership in dbt - Mini Project: Build & Apply

Group-based ownership

📖 Scenario: You work in a company where different teams own different data tables. To keep track of who owns what, you want to create a simple ownership mapping using dbt.

🎯 Goal: Build a dbt model that creates a table showing each data table and the group that owns it.

📋 What You'll Learn

Create a dictionary mapping table names to owner groups

Create a variable for the group name to filter

Use a comprehension or filter to select tables owned by the group

Output the list of tables owned by the selected group

💡 Why This Matters

🌍 Real World

Companies often assign ownership of data tables to different teams to manage access and responsibility clearly.

💼 Career

Understanding group-based ownership helps data analysts and engineers organize data access and maintain data governance.

1

Create the ownership dictionary

Create a dictionary called table_owners with these exact entries: 'customers': 'sales', 'orders': 'sales', 'products': 'marketing', 'campaigns': 'marketing', 'employees': 'hr'.

dbt

# Create the dictionary called table_owners with the exact entries
# Your code here

Hint

Use curly braces {} to create a dictionary with keys as table names and values as group names.

2

Set the group to filter

Create a variable called selected_group and set it to the string 'marketing'.

dbt

table_owners = {
    'customers': 'sales',
    'orders': 'sales',
    'products': 'marketing',
    'campaigns': 'marketing',
    'employees': 'hr'
}
# Create the variable selected_group and set it to 'marketing'
# Your code here

Hint

Assign the string 'marketing' to the variable selected_group.

3

Filter tables owned by the selected group

Create a list called owned_tables that contains the keys from table_owners where the value equals selected_group. Use a list comprehension with for table, group in table_owners.items() and a condition.

dbt

table_owners = {
    'customers': 'sales',
    'orders': 'sales',
    'products': 'marketing',
    'campaigns': 'marketing',
    'employees': 'hr'
}
selected_group = 'marketing'
# Create the list owned_tables using a list comprehension filtering by selected_group
# Your code here

Hint

Use a list comprehension to pick tables where the group matches selected_group.

4

Print the owned tables

Write a print statement to display the list owned_tables.

dbt

table_owners = {
    'customers': 'sales',
    'orders': 'sales',
    'products': 'marketing',
    'campaigns': 'marketing',
    'employees': 'hr'
}
selected_group = 'marketing'
owned_tables = [table for table, group in table_owners.items() if group == selected_group]
# Print the owned_tables list
# Your code here

Hint

Use print(owned_tables) to show the tables owned by the marketing group.

Practice

1. What is the main benefit of using group-based ownership in dbt projects?

easy

A. It automatically fixes data errors in models.

B. It assigns responsibility to teams instead of just individuals.

C. It speeds up the dbt compilation process.

D. It removes the need for documentation.

Solution

1. Step 1: Understand group-based ownership purpose

   Group-based ownership means assigning responsibility to a team, not just one person.

2. Step 2: Identify the benefit in collaboration

   This improves teamwork and clarity on who manages data models.

3. Final Answer:

   It assigns responsibility to teams instead of just individuals. -> Option B

4. Quick Check:

   Group ownership = team responsibility [OK]

Hint: Group ownership means teams, not individuals [OK]

Common Mistakes:

• Thinking it fixes data automatically
• Confusing ownership with performance
• Assuming it removes documentation needs

2. Which of the following is the correct way to assign a group owner in a dbt model configuration?

easy

A. owners: ['data_team']

B. owner = 'data_team'

C. groups: ['data_team']

D. team_owner: 'data_team'

Solution

1. Step 1: Recall dbt model ownership syntax

   dbt uses the owners field as a list to assign group owners.

2. Step 2: Match correct syntax

   The correct syntax is owners: ['group_name'], which matches owners: ['data_team'].

3. Final Answer:

   owners: ['data_team'] -> Option A

4. Quick Check:

   Use owners list for groups [OK]

Hint: Use owners: ['group_name'] to assign groups [OK]

Common Mistakes:

• Using owner instead of owners
• Using groups or team_owner fields which don't exist
• Assigning a string instead of a list

3. Given this dbt model config snippet:

models:
  - name: sales_summary
    owners: ['analytics_team', 'data_engineers']

Which groups are responsible for the sales_summary model?

medium

A. Only analytics_team

B. Only data_engineers

C. Both analytics_team and data_engineers

D. No groups assigned

Solution

1. Step 1: Read the owners list in config

   The owners field lists two groups: 'analytics_team' and 'data_engineers'.

2. Step 2: Understand group ownership assignment

   Both groups share responsibility for the model.

3. Final Answer:

   Both analytics_team and data_engineers -> Option C

4. Quick Check:

   Multiple owners = multiple groups responsible [OK]

Hint: Multiple owners means multiple groups share responsibility [OK]

Common Mistakes:

• Choosing only one group when multiple are listed
• Ignoring the owners field
• Assuming no groups if multiple owners exist

4. Identify the error in this dbt model configuration snippet:

models:
  - name: customer_data
    owners: 'marketing_team'

medium

A. models key should be capitalized

B. name field is missing

C. owners field is misspelled

D. owners should be a list, not a string

Solution

1. Step 1: Check owners field type

   The owners field must be a list of strings, but here it is a single string.

2. Step 2: Confirm correct syntax

   Correct syntax uses square brackets: owners: ['marketing_team'].

3. Final Answer:

   owners should be a list, not a string -> Option D

4. Quick Check:

   owners must be a list [OK]

Hint: Always use a list for owners, even if one group [OK]

Common Mistakes:

• Using a string instead of a list
• Misspelling owners field
• Ignoring YAML syntax rules

5. You want to assign ownership of a dbt model to two groups: 'data_science' and 'qa_team'. Which configuration correctly sets this up and ensures both groups are notified on model changes?

hard

A. owners: ['data_science', 'qa_team']

B. owners: 'data_science, qa_team'

C. owner: ['data_science', 'qa_team']

D. groups: ['data_science', 'qa_team']

Solution

1. Step 1: Confirm correct field name and type

   The field must be owners and a list of group names.

2. Step 2: Check options for correct syntax

   owners: ['data_science', 'qa_team'] uses owners: ['data_science', 'qa_team'], which is correct.

3. Step 3: Understand notification implication

   Assigning multiple owners ensures both groups are responsible and notified.

4. Final Answer:

   owners: ['data_science', 'qa_team'] -> Option A

5. Quick Check:

   Multiple owners list = multiple groups notified [OK]

Hint: Use owners list with all groups to notify them [OK]

Common Mistakes:

• Using a string with commas instead of a list
• Using owner instead of owners
• Using groups field which is invalid