- Non-standard alternative:
last_value(<expr>, 'ignore nulls') - Non-standard alternative:
last_value(<expr> ignore nulls)
The last_value(…) window function with the ignore nulls clause evaluates its argument in the rows defined by the over clause in reverse order and returns the first non-null value (if any).
SELECT LAST_VALUE(<expr>) IGNORE NULLS OVER (ORDER BY …)
FROM …Default Framing Applies
If there is no explicit framing clause the following default applies:
RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROWThat means, the last_value() function cannot see beyond the ties to the current row. Open the frame to bring the last row into reach:
ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWINGRelated
Normative References
The last_value() ignore nulls is defined in ISO/IEC 9075:2016-2 as part of optional feature T617, “FIRST_VALUE and LAST_VALUE functions”.
