26 Aug ETL, combine data from multiple database
Week 12 Lab: ETL, combine data from multiple databases
Monday, April 4, 2022, 1:06 PM
There are 3 databases: SuperStoreDB, DemoDB, and week7lab.
We need to collect Products data from all 3 databases into your database for analysis.
Data: Product Name, ProductFamily, Unit Price, Source Database
1. Examine SuperStoreDB.fi_Product, DemoDB.Product , week7lab.products to find columns with necessary information
2. Select the data from each database and create one common view.
- a. query each database table getting correct information , add database name as an extra column ( HINT: select col1, col2, “db_name” as source from my_table )
- b. combine all 3 query with UNION ALL in a single query
- c. create a view Week11_ETL_vi from the query in step “b”.
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