ATan

2005
2008
2012
2014
2016
2017
2019
2022

2005, 2008, 2012, 2014, 2016, 2017, 2019, 2022

ATan (Arctangent) Mathematical Function

Use the ATan function to return the square root of the specified expression.

Syntax

db.fx.ATan({expression})

Arguments

expression: – The value to use in the arctangent calculation.

Returns

float

Examples

Select Statement

Select the square root of a product's weight (which is nullable in the database).

float? result = db.SelectOne(
        db.fx.ATan(dbo.Product.Weight)
    )
    .From(dbo.Product)
    .Where(dbo.Product.Weight > 0 & dbo.Product.Weight < 1)
    .Execute();

Where Clause

Select the square root of a product's depth (which is nullable in the database) where the depth is between 0 and 1.

float? result = db.SelectOne(
        db.fx.ATan(dbo.Product.Depth)
    )
    .From(dbo.Product)
    .Where(dbo.Product.Depth > 0 & dbo.Product.Depth < 1)
    .Execute();

Order By Clause

Select and order by the square root of a product's depth.

IEnumerable<Product> result = db.SelectMany<Product>()
    .From(dbo.Product)
    .OrderBy(db.fx.ATan(dbo.Product.Depth).Desc())
    .Execute();

Group By Clause

Select product details grouped by product category and square root of the product's depth.

IEnumerable<dynamic> results = db.SelectMany(
        dbo.Product.ProductCategoryType,
        db.fx.ATan(dbo.Product.Depth).As("calculated_value")
    )
    .From(dbo.Product)
    .GroupBy(
        dbo.Product.ProductCategoryType,
        db.fx.ATan(dbo.Product.Depth)
    )
    .Execute();

Having Clause

Select the ids of all products, grouped by product category type having an arctangent of the product's depth less than .5.

IEnumerable<ProductCategoryType?> results = db.SelectMany(
        dbo.Product.ProductCategoryType
    )
    .From(dbo.Product)
    .GroupBy(
        dbo.Product.ProductCategoryType,
        db.fx.ATan(dbo.Product.Depth)
    )
    .Having(
        db.fx.ATan(dbo.Product.Depth) < .5f
    )
    .Execute();