--- slug: /en/sql-reference/aggregate-functions/reference/cramersvbiascorrected sidebar_position: 352 --- # cramersVBiasCorrected Cramer's V is a measure of association between two columns in a table. The result of the [`cramersV` function](./cramersv.md) ranges from 0 (corresponding to no association between the variables) to 1 and can reach 1 only when each value is completely determined by the other. The function can be heavily biased, so this version of Cramer's V uses the [bias correction](https://en.wikipedia.org/wiki/Cram%C3%A9r%27s_V#Bias_correction). **Syntax** ``` sql cramersVBiasCorrected(column1, column2) ``` **Parameters** - `column1`: first column to be compared. - `column2`: second column to be compared. **Returned value** - a value between 0 (corresponding to no association between the columns' values) to 1 (complete association). Type: always [Float64](../../../sql-reference/data-types/float.md). **Example** The following two columns being compared below have a small association with each other. Notice the result of `cramersVBiasCorrected` is smaller than the result of `cramersV`: Query: ``` sql SELECT cramersV(a, b), cramersVBiasCorrected(a ,b) FROM ( SELECT number % 10 AS a, number % 4 AS b FROM numbers(150) ); ``` Result: ```response ┌──────cramersV(a, b)─┬─cramersVBiasCorrected(a, b)─┐ │ 0.41171788506213564 │ 0.33369281784141364 │ └─────────────────────┴─────────────────────────────┘ ```