Data Types, Missing Values, and Safe Filtering

Help learners understand this topic clearly, practice it on a small example, and produce reviewable evidence before moving to the next module.

Units

1. Unit 03.00: Data Types, Missing Values, and Safe Filtering: Read the schema and identify the grain
2. Unit 03.01: Data Types, Missing Values, and Safe Filtering: Write the query in small testable steps
3. Unit 03.02: Data Types, Missing Values, and Safe Filtering: Check row counts, joins, filters, and nulls
4. Unit 03.03: Data Types, Missing Values, and Safe Filtering: Explain what the query proves and does not prove
5. Unit 03.04: Data Types, Missing Values, and Safe Filtering: Save the final SQL evidence note

Module work

• Activity
• Knowledge check
• Summary