Building A Data Warehouse With Examples In Sql | ...

: Cleaning data in the Silver Layer , such as standardizing "Yes/No" strings to booleans. Load : Inserting into the final Gold Layer tables.

: dim_product , dim_customer , and dim_date provide context. 2. Laying the Foundation (SQL Table Creation) You start by defining these structures in your database. Building a Data Warehouse with Examples in SQL ...

-- Transforming and Loading: Standardizing product names to uppercase INSERT INTO dim_product (product_key, product_name, category) SELECT product_id, UPPER(p_name), category FROM raw_staging_products; Use code with caution. Copied to clipboard 4. The Final View (Analytical Querying) : Cleaning data in the Silver Layer ,

: Stores metrics like price, quantity, and foreign keys. Copied to clipboard 4

-- Finding total sales by product category SELECT p.category, SUM(s.sale_amount) AS total_revenue FROM fact_sales s JOIN dim_product p ON s.product_key = p.product_key GROUP BY p.category; Use code with caution. Copied to clipboard