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Give short note on the following terms:Dirty pages and ETL
a.) Dirty pages.
These are buffer pages which comprise modifications which haven't been written to disk.
b.) ETL - Extraction, Transformation, and Loading.
- It's the process of copying and cleaning data from heterogeneous sources.
- It is a vital part of development projects for data warehousing and business intelligence.
Views in relational algebra: 1. Basic expression contains either a) A relation in the database. b) A constant relation. 2. General expressions are madde out of sma
Differentiate between a unique key and a primary key. - By default, clustered index on column are created by primary key while nonclustered index are created by unique key.
The Form input elements are: Reporter name text type input Password
Explain Foreign Key? Foreign Key - Let there are two relations (tables) R and S. Any candidate key of the relation R that is referred within the relation S is known as the fo
Consider the relation schemas as follows. works (person name, company name, salary); lives (person name, street, city); located in(company name, city); managers (person name
Define rotational latency time. The time spent waiting for the sector to be accessed to appear under the head is known as the rotational latency time.
What are the advantages of embedded query language? Give an example of an embedded SQL query. Embedded query language - SQL could be implemented within two ways. It can be us
What type of view of total database content? Data base content Conceptual view of total database contain.
What is Cross Product? Simply Cross product is Binary Operator
Relational Model: The relational model uses a collection of tables to represent both data and the relationships among those data. Each table has multiple columns and each column h
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