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  2. Aggregate data is widely used, but it also has some limitations, including drawing inaccurate inferences and false conclusions which is also termed ‘ ecological fallacy ’. ‘ Ecological fallacy’ means that it is invalid for users to draw conclusions on the ecological relationships between two quantitative variables at the individual level.
    en.wikipedia.org/wiki/Aggregate_data
    While aggregate data are essential to understanding how the public-education system is working, aggregate-data reports are generally limited to the identification of broader trends and patterns in education; they are not as useful when it comes to diagnosing deeper underlying problems such as disparities in educational performance among students of different races and ethnicities.
    www.edglossary.org/aggregate-data/
    Aggregate functions are not allowed because the WHERE clause is used for filtering data before aggregation. So while WHERE isn’t for aggregation, it has other uses. To filter data based on an aggregate function result, you must use the HAVING clause.
    learnsql.com/blog/aggregate-functions-in-where-cla…
    For any aggregate calculation, you cannot combine an aggregated value and a disaggregated value. For example, SUM (Price)* [Items] is not a valid expression because SUM (Price) is aggregated and Items is not. However, SUM (Price*Items) and SUM (Price)*SUM (Items) are both valid.
    help.tableau.com/current/pro/desktop/en-us/calcula…
     
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    Aggregate data - Wikipedia

    In statistics, aggregate data are data combined from several measurements. When data is aggregated, groups of observations are replaced with summary statistics based on those observations. In a data warehouse, the use of aggregate data dramatically reduces the time to query large sets of data. … See more

    Aggregate data is high-level data which is acquired by combining individual-level data. For instance, the output of an industry is an aggregate of the firms’ individual outputs within that industry. Aggregate data are … See more

    Researchers and analysts
    Researchers use aggregate data to understand the prevalent ethos, evaluate the essence of social realities and a social organisation, stipulate primary issues of concern in research, and supply projections in … See more

    Health care
    In a health information system, aggregate data is the integration of data concerning numerous patients. A particular patient cannot be traced … See more

    Financial aggregates data
    Financial aggregates data is a type of aggregate data about credit and the money supply in Australia, which is utilised by policymakers in evaluating both the households and the companies’ economic and financial activities. See more

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    Aggregate data can be a composition of various types of writings and records, including biography, autobiography, descriptive accounts … See more

    Comparative political analysis
    Aggregate data is used in comparative political analysis because analysts do not only focus on … See more

    During the process of averaging units within some cluster or within a country, information is lost which increases the probability of drawing inaccurate inferences. Information loss occurs because aggregation of data ignores individual variation … See more

     
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    Apr 4, 2018 · I’m going to run through two examples where data aggregation becomes problematic. The first one probably is familiar if you’ve worked with some kind of statistics. Reading this will help you understand aggregated …

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