Hello Anshul,
In Amazon QuickSight, there are specific limits for parameters that can be created. For dataset parameters, you can use up to 128 dataset parameters in a custom SQL query. See reference
For analysis-level calculations, you can have up to 200 calculated fields per dataset within an analysis. See reference
The overall limit for an analysis (sum of all calculated fields from different datasets plus analysis-level calculations) is 500.
When working with dataset parameters, they can be mapped to analysis parameters to be used with filters, controls, and other analysis parameter features.
Dataset parameters can be used for custom SQL in direct query, as repeatable variables, and to move calculated fields to datasets. See Limit reference
Hope this helps.
Cheers,
Deep