Illustrate the five SQL built-in functions
Illustrate the five SQL built-in functions.
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COUNT: calculates the num of lines in a table.
SUM: totals numeric columns.
AVG: calculates the average value in SQL.
MAX: receives the maximum value of a column in a table.
MIN: receives the minimum value of a column in a table.
Explain the following term: a) ROLAP b) MOLAP
Explain how the Chasm trap is solved?
Explain the term transformer stage?
Explain the types of jobs we have within the Data stage?
Explain the Combined Query?
Explain the term optimization and performance tuning and its work in practical projects?
How are metadata keys and surrogate handled in MySQL?
Consider a MOVIE database in which data is recorded about the movie industry. The data requirements are summarized as follows: ¦ Each movie is identified by title and year of release. Each movie has a length in minutes. Each has a production company, and each is classified under one or more genre
Determine the concept of Relation Schema and a Relation?
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