Example: Unpivoted Sales and Cogs Columns

Teradata Vantage™ SQL Functions, Expressions, and Predicates

brand
Software
Teradata Vantage
prodname
Teradata Database
Teradata Vantage NewSQL Engine
vrm_release
16.20
category
Programming Reference
featnum
B035-1145-162K

In this example, the sales and cogs columns are unpivoted.

SELECT *
FROM star1p UNPIVOT ((sales,cogs)  FOR  yr_qtr 
                          IN ((Q101Sales, Q101Cogs) AS ‘Q101’, 
                              (Q201Sales, Q201Cogs) AS ‘Q201’,
                              (Q301Sales, Q301Cogs) AS ‘Q301’)) Tmp;

The output for the unpivoted table:

country  state  yr_qtr        sales         cogs
-------  -----  ------  -----------  -----------
Canada   ON     Q201             10            0
Canada   ON     Q301             10            0
USA      NY     Q101             45           25
USA      CA     Q101             30           15
USA      CA     Q201             50           20

Note that a pivot combined with a matching unpivot may introduce rows with NULL values. It is possible to unpivot just the ‘yr’ column.