All About Data Profiling in SQL

Explore the power of SQL profiling and learn how it can help you optimize your data

Chi Nguyen
9 min readMar 16, 2023
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Data Profiling: What and Why?

Different from data mining, which is a process of searching for insights underlying the data patterns, data profiling is a method of examining the data quality to identify potential problems with the data, such as inconsistencies, errors, or missing values, and to ensure that the data is accurate, complete, and consistent.

In data analysis, data profiling offers numerous advantages, including:

  • Faster data analysis: By understanding the characteristics and relationships in the data, we can speed up the analysis process
  • Promote accurate decision-making and predictive analysis: By eliminating errors in a dataset (missing values, outliers, etc.,) data profiling can help to ensure the quality of decision-making, avoid incorrect projections and misinterpretation of data, leading to better business outcomes
  • Efficient data management: By understanding the structure and content of the data, data profiling can help recognize parts within a system that experience the most data quality issues and identify redundant data, which will be eliminated to enhance storage efficiency and reduce…

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Chi Nguyen

MSc in Statistics. Sharing my learning tips in the journey of becoming a better data analyst. Linkedin: https://www.linkedin.com/in/chinguyenphamhai/