15.00 - WeekNumber_Of_Quarter - Teradata Database

Teradata Database SQL Functions, Operators, Expressions, and Predicates

Product
Teradata Database
Release Number
15.00
Content Type
Programming Reference
Publication ID
B035-1145-015K
Language
English (United States)

WeekNumber_Of_Quarter

Purpose  

Returns the number of weeks from the beginning of the quarter to the specified date.

Syntax  

Syntax Elements

calendar_name

A calendar name. The possible values are Teradata, ISO, and COMPATIBLE.

This argument must be a character literal and cannot be a table column or expression. If you do not name a calendar, Teradata uses the calendar for the session.

expression

An expression that results in a DATE, TIMESTAMP, or TIMESTAMP WITH TIME ZONE value.

NULL

The business calendar for the session.

TD_SYSFNLIB

Name of the database where the function is located.

ANSI Compliance

This is a Teradata extension to the ANSI SQL:2011 standard.

Argument Types

The first argument, expression, is defined with the following data types:

  • DATE
  • TIMESTAMP
  • TIMESTAMP WITH TIME ZONE
  • The second argument, calendar_name, is optional and is defined with the following argument data types:

  • VARCHAR
  • NULL
  • If the argument passed to the function does not match one of these declared data types, an error is returned indicating that the function does not exist.

    Result

    The result is an INTEGER value between 1 and 14, representing the nth week of the quarter. The value 0 means the partial week, Week0.

    Example  

    If the current date is April 20, 2011, the following query returns 3 because April 20, 2011, is in the third week of the quarter in the Teradata calendar:

       SELECT TD_SYSFNLIB.WEEKNUMBER_OF_QUARTER(CURRENT_DATE);

    The following query returns 3 because April 20, 2011, is in the third week of the quarter in the ISO calendar:

       SELECT TD_SYSFNLIB.WEEKNUMBER_OF_QUARTER (DATE '2011-04-20', ’ISO’);