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Discuss how OLAP and data warehousing technologies work together in solving user problems. What are the advantages and disadvantages of the different OLAP technologies (MOLAP, ROLAP, HOLAP)? What about other OLAP derivatives (OLAP based technologies)?
A distributed database management system (DDBMS) stores a logically related database over two or more physically distinct locations connected by a computer network.
Optimistic concurrency control sets few locks on the data in the database, lowering the isolation level that you use in an application. This allows more applications to run co
optimize the query in the select script using Alter Table to add appropriate indexes. Also use Optimize and Explain to show how the performance of this query has improved.
Assume that a student table in a university database has an index on StudentID (the primary key). and additional indexes on Major, Age, Marital status, and HomeZipCode.
Indexing can affect the performance of a general-purpose database that has roughly equal numbers of fetches and changes. The decision to add an index can improve the performan
One side effect of normalization is that you often need more than one table to get meaningful results. For example, you may have a table that includes a list of parts and the
What is the key value of the 4th index record on the top level, assuming each index record points to the record with the highest key value in a block of the next level down?
Create an ER diagram using the set of requirements provided for Oxford City Council's bicycle sharing scheme and identify the minimal set of functional dependencies and all c
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