Tableau Calculation

There are four necessary components to the calculation in Tableau:

1. 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).
2. 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].
3. 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, ( )
4. Literal Expression: Literals expression are represent the constant values "as is" such as "profitable" and "unprofitable".
   For Example: See the below calculation

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

1. Functions: IF, THEN, ELSEIF, ELSE, and END.
2. Field: Profit per Day.
3. Operators: > and <=.
4. 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

1. 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]
2. 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