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Selection has more power to reduce size (Number of rows) while projection can not reduce number of tuples

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12y ago

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When you request specific data from a database what is it called?

When you request specific data from a database, it is called a query. A query is a request for information from a database that matches certain criteria. This is commonly done using Structured Query Language (SQL) commands to retrieve the desired data.


What can be done if you do wrong team selection for your football team?

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Selection for desired traits that is done by humans is called?

artificial selection


In chapter three of night Describe the first selection?

The first selection is where the prisoners are chosen what will be done to them. Men and women were segregated first, then it is decided whether they will live as laborers and which will feed the crematory.


When is the keyword occurring when work is being done?

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Is cash flow projection is the same as sale forecast?

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A selection done by nature lol i know notin?

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How do you do query based information extraction?

Query-based information extraction involves extracting specific information from a text based on a predefined query. This can be done using techniques such as named entity recognition, part-of-speech tagging, and syntactic parsing to identify relevant information based on the query parameters. Natural language processing or machine learning algorithms can be used to match the query with the text and extract the required information.


Who is a QA in medical transcription?

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What are the main types of projection?

A Projection is defined as a process which transforms points in a coordinate system of dimension n into points in a coordinate system of dimension less than n.The mapping of 3D objects onto the 2D screen is done by straight projection rays (called projectors) emanating from a center of projection, passing through each point of the object, and intersecting a projection plane to form the projection.Projections can be divided into two basic classes:Perspective or Vanishing Point Method (VPM)Parallel Projection


What are are the 2 main types of projection?

A Projection is defined as a process which transforms points in a coordinate system of dimension n into points in a coordinate system of dimension less than n.The mapping of 3D objects onto the 2D screen is done by straight projection rays (called projectors) emanating from a center of projection, passing through each point of the object, and intersecting a projection plane to form the projection.Projections can be divided into two basic classes:Perspective or Vanishing Point Method (VPM)Parallel Projection