# Tableau Calculation

There are four necessary components to the calculation in Tableau:

**Function:**Function statements are used to transform the values or members in a field.**For Example:**The format of all functions in Tableau such as SUM (expression).**Fields:**Field is dimensions and measures from your data source.**For Example:**A field in a calculation is often surrounded by brackets [ ] such as [Sales].**Operators:**Operator is a symbol that denotes an operation between the operands.**For Example:**The types of operators you can use in Tableau calculations, as well as the order they are performed in a formula such as +, -, *, /, %, ==, =, >, <, >=, <=, ! =, <>, ^, AND, OR, NOT, ( )**Literal Expression:**Literals expression are represent the constant values “as is” such as “profitable” and “unprofitable”.**For Example:**See the below calculation

IF [Profit per Day] > 5000THEN"Highly Profitable" ELSEIF [Profit per Day] <= 0THEN"Unprofitable" ELSE "Profitable" END

The component of the above calculation can be further divided into the following:

**Functions:**IF, THEN, ELSEIF, ELSE, and END.**Field:**Profit per Day.**Operators:**> and <=.**Literal Expression****String Literals:**“Highly Profitable”, “Unprofitable”, and “Profitable”.**Numeric Literals:**5000, and 0.

**Note:** Not all calculation needs to contain all the four components.

**Here is some important point for literal expression syntax:**

- Numeric literals are written as numbers.
**Example:**27 or 1.3567 - String literals are written with quotation marks.
**Example:**“profitable.” - Date literals are written with the # symbol.
**Example:**# June 8, 2018 # - Boolean literals are written as either true or false.
**Example:**“True” or “False” - Null literals are written as null.
**Example:**“NULL”

**Two more calculations contain by Tableau**

**Parameters:**Parameter is a placeholder variable that can be inserted into calculations to replace the constant values.

A parameter in a calculation is surrounded by brackets [ ].**For Example:**[Profit Bin Size]**Comments:**Comment is defined as the notes about a calculation or its parts, but comments not included in the computation of the calculation.

To enter a comment in a calculation, use two forward slashes //.**For Example**

SUM ([Sales]) / SUM ([Profit]) // Nick's calculation // to be used for profit ratio // Do not edit