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

: 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.

-- Creating a Dimension Table for Products CREATE TABLE dim_product ( product_key INT PRIMARY KEY, product_name VARCHAR(100), category VARCHAR(50) ); -- Creating the Fact Table CREATE TABLE fact_sales ( sale_id INT PRIMARY KEY, product_key INT, customer_key INT, sale_amount DECIMAL(10, 2), sale_date DATE, FOREIGN KEY (product_key) REFERENCES dim_product(product_key) ); Use code with caution. Copied to clipboard 3. Moving the Earth (ETL Process) Building a Data Warehouse with Examples in SQL ...

moves data from raw sources (like CSVs or ERP systems) into your warehouse. Extract : Pulling raw data into the Bronze Layer . : dim_product , dim_customer , and dim_date provide context