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  1. About the Data Vault SQL Reference
  2. Introduction to SQL Reference for Informatica Data Vault
  3. Date and Time Arithmetic
  4. WHERE Clauses
  5. UNION Operator
  6. Parameterized Query
  7. Functions

Data Vault SQL Reference

Data Vault SQL Reference

Functions Overview

Functions Overview

A function is a named, specialized operation performed on zero or more input values, that returns a single value when executed successfully. A function can appear anywhere a value expression is permitted. The function is invoked by its name, followed by the input arguments in parentheses.
The following table describes the types of functions that you can use:
Function Type
Description
Aggregate
An operation applied to the values contained in a particular column (or in a derived column created by a value expression), producing a single value that summarizes the (derived) column. The
value expression
argument cannot itself contain an aggregate function.
Cast
The cast functions are used to convert input values from one format to another. A cast function can appear anywhere a value expression is permitted in SQL syntax.
String
The string functions are used to manipulate character string values. A string function can be used anywhere a string value expression is permitted.
Math
The math functions are used for manipulating numeric values. A math function can appear wherever a numeric value expression is allowed.
Date/Time
The date/time functions are used to manipulate DATE, TIME, and TIMESTAMP values, and can appear wherever a value expression is permitted.
NULLIF, COALESCE, IFNULL
The three functions that are designed to handle a subset of the CASE functionality.

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