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A column analysis is open in the analysis editor in the Profiling perspective of Talend Studio.
Before you begin
- From the Data preview view in the analysis editor, click Select indicators to open the Indicator Selection dialog box.
From the Indicator Selection dialog box:
It is useless to use Pattern Frequency Statistics on a column of a Date type in databases when executing the analysis with the SQL engine. No data quality issues are returned by this indicator as all dates will be displayed using one single format.
If you attach the Date Pattern Frequency to a date column in your analysis, you can generate a date regular expression from the analysis results.
The selected indicators are attached to the analyzed columns in the Analyzed Columns view.The analysis in this example provides/computes the following:
- Simple statistics on all columns,
- The characteristics of textual fields, using text statistics indicators, and the number of most frequent values for each distinct record in the indicators,
- Patterns in the email column to show frequent and rare patterns so that you can identify quality issues more easily, using pattern frequency statistics indicators,
- The range, the inter quartile range and the mean and median values of the numeric data in the total_sales column, using summary statistics indicators,
- The frequency of the digits 1 through 9 in the sales figures to detect fraud, using fraud detection indicators.