Data observability

Alert Types

Nulls

Count null values in your columns

Count

Total number of rows in a table as an autometric once per table

Cardinality

Count of distinct elements in each column to be used when you expect a fixed number of value options.

Min & Max

Minimum & maximum valueof the column

Median

Column median computed as the 50th percentile, and will only return a value in the dataset. Not valid for the MySQL source type.

Skewness

Statistical column skew, used to determine how evenly the values are distributed about the mean. Negative skews means a larger tail below the mean, a positive skew indicates a larger tail above the mean.

Variance

Statistical column variance, used to track the spread of numbers beyond the average.

Geometric Mean

The geometric mean column is used for a set of numbers whose values are meant to be multiplied together or are exponential in nature.

Freshness (hrs)

Difference between the metric collection time and the maximum column value, in hours.

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