![]() Try Dataedo Data Profiling for free Min/max string SELECT MIN(mycolumn) AS value_min,Ĭolumn profiling (min, max, avg) in Dataedo: This query will help you identify outliers and incorrect values. age, order_date, amount, etc.) you know what the expected range of values is. Standard deviation - how far to the average are values in the column,įor many fields (i.e.This query analyzes data in specific (numeric or date) column and finds: Query below returns number of rows in a table: SELECT COUNT(*) AS row_count To use it on your database replace 'mytable' and 'mycolumn' with names of particular table and/or column. Data Protection - data profiling helps you identify sensitive data in your databases.īelow you'll find copy&paste&replace queries that you can use on your database to profile data in columns and understand data and test its quality.Įach query is run against specific table or column.System or Application Integration - Similarly to data migration, integration of systems requires good understanding of data structures, fields, datatypes, allowed values of systems being integrated.Data profiling should be one of the first steps in the process, followed by data documentation. And that requires understanding the structure, types, values and quality of data. Analysts and developers need to map source and destination databases, and design transformation and cleansing logic. Data or Application Migration - Migration of data to a new database, application or cloud requires good understanding of the data in source database.Data profiling helps everyone better find and understand the dataset. Even great analysts with extensive experience with your databases make wrong assumptions about the data. BI & Analytics - any data analysis requires good understanding of data being analyzed.It is crucial for finding and understanding data in source systems, and assessing quality and cleansing the data. Data Warehousing - according to Kimball, father of data warehousing, data profiling should be performed throughout the data warehouse project.Data Quality/Data Governance - Data profiling is plays crucial role in data quality - this is how you asses the quality of the data.Document the data - having an x-ray of columns in a table helps you understand and document the table.Data profiling allows you to identify and measure issues with data. Improve data quality - it's hard to manage something that you cannot measure.Data profiling helps us avoid such assumptions. If those assumptions are incorrect analysis or report results will be incorrect. ![]()
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