Vertica中的函数是否等同于SQL中的DATENAME

Question

In sql i will get DateName from the following query

SELECT DATENAME(dw,'10/24/2013') as theDayName

to return 'Thursday'

have any equivalent function in Vertica?

Answer 1

The easiest way without using a custom UDF is using TO_CHAR formatting:

SELECT TO_CHAR(TIMESTAMP '2014-08-21 14:34:06', 'DAY');

This returns the full uppercase day name. Day gives the mixed-case day name, and day gives the lowercase day name.

You can find more template patterns here .

Answer 2

You can try installing a custom UDF ( weekday_name ). Once installed, you can use:

SELECT weekday_name(dayofweek(TO_DATE('10/24/2013','MM/DD/YYYY')))

Answer 3

Use this script, it will produce the desired result in Vertica

SELECT DAYOFWEEK (TIMESTAMP '2014-08-21 05:26:24.000');

Reference . .