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Expression Editor
Expression Editor
Expressions combine or manipulate one or more pieces of data into a new piece of data using mathematical or boolean logic, as well as a set of built-in functions; therefore, they must follow the standard algebraic rules for order of operations.
Expression Functions
A function performs a calculation between values in order to produce another value. When functions are used in an expression, they aid in the expression's evaluation.

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- Expression Editor
  - Expression Editor
    Expressions combine or manipulate one or more pieces of data into a new piece of data using mathematical or boolean logic, as well as a set of built-in functions; therefore, they must follow the standard algebraic rules for order of operations.
    - Expression Functions
      A function performs a calculation between values in order to produce another value. When functions are used in an expression, they aid in the expression's evaluation.
    - Math Functions in Expressions
      Math functions are used for mathematical calculations in an expression.
    - Conversion Functions in Expressions
      Conversion functions convert expressions of one data type to another data type when data type conversions are not automatically performed by SQL Server.
    - Logical Functions in Expressions
      Logical functions perform an operation or comparison on objects and expressions.
    - Text Functions in Expressions
      Text functions perform an operation on a string input value and return a string or numeric value.
    - Date Functions in Expressions
      Date functions perform an operation on a date and time input value and return a string, numeric, or date and time value.
    - Expression Operators
      An operator performs an operation in an expression on one or more elements that hold value.
    - Expression Variables
      Variables are previously configured components in Workflow models that can be included in an expression for evaluation.
    - String, Numeric, and Boolean Literals in Expressions
      A literal is a textual representation of a particular value in an expression.
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Expression Functions

A function performs a calculation between values in order to produce another value. When functions are used in an expression, they aid in the expression's evaluation.

There are many function types that can be used when developing expressions. For more information, see:

Expression Functions:
- Math
- Conversion
- Logical
- Text
- Date
- Time Span

Examples

To check if the difference between two variables has exceeded a limit of 100:
- ABS(a – b) > 100

To calculate the maximum of two values:
- IF (a >= b, a, b)

Pythagorean theorem:
- SQRT(POWER(a, 2) + POWER(b, 2)) > c