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Design a data warehouse for a electronics store chain. The chain has 20 stores in 5 cities. Each store has different sections including computers, DVDs, TVs, audio, home appliances etc. Each store has roughly 5,000 individual items. Each item is identified by an SKU (Stock Keeping Unit) and/or UPC (Universal Product Code). Go over the four design steps and create a detailed schema of the fact and dimensions tables with all the required attributes.
Controls which need a database to either execute transaction completely or not at all.
Produce a scatterplot of Rent vs. Size (square meters of the apartment) for the rental data in rent.
The data dictionary serves as an important data management tool by? assigning attributes to the data, maintaining data in updated form.
The DBA denormalized some of the data in the Premiere Products database to improve performance. Which field or fields cause the table to no longer be in third normal form? In which normal form is the denormalized table?
Create use case to describe a typical sales process. Then make a sequence diagram for use case.
Practice on topic of Normalization
our current database uses dictionary-managed tablespaces. In running various performance tuning scripts, you have discovered that one of these tablespaces seems to have run out of space long before you calculated that it would.
Energy in the home, personal energy use and home energy efficiency and Efficient use of ‘waste' heat and renewable heat sources
Artificially small example of B+ tree is shown here (pdf). (Note only part of tree is shown in detail.) What nodes of example B+ tree are visited to find posting list for "dune"?
Compute the functional dependencies which exist in following table. After determining the functional dependencies, transform this table to an equivalent collection of the tables which are in third normal form.
Write a Assignment to study and modify the PostgreSQL source code, with a focus on one of the core modules - the buffer manager
Several times, database triggers are utilized to record logins by users. Here is the example of login trigger that inserts row into table every time a user connects.
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