# Calculated field function and operator reference for Amazon Quick
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You can add calculated fields to a dataset during data preparation or from the analysis page. When you add a calculated field to a dataset during data preparation, it's available to all analyses that use that dataset. When you add a calculated field to a dataset in an analysis, it's available only in that analysis. 

You can create calculated fields to transform your data by using the following functions and operators.

**Topics**
+ [Operators](arithmetic-and-comparison-operators.md)
+ [Functions by category](functions-by-category.md)
+ [Functions](functions.md)
+ [Aggregate functions](calculated-field-aggregations.md)
+ [Table calculation functions](table-calculation-functions.md)