What is the use of this statement?
Please elaborate with an example. I came across it while using the LAST_VALUE function.
What is the use of this statement? Please elaborate with an example. I came
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What is the use of this statement?
Please elaborate with an example. I came across it while using the LAST_VALUE function.
from https://forums.oracle.com/forums/thread.jspa?threadID=1018352
when you ORDER a set of records in analytic functions you can specify a range of rows to consider,ignoring the others.
You can do this using the ROWS clause
UNBOUNDED PRECEDING
The range starts at the first row of the partition.
UNBOUNDED FOLLOWING
The range ends at the last row of the partition.
CURRENT ROW
range begins at the current row or ends at the current row
n PRECEDING or n FOLLOWING
The range starts or ends n rows before or after the current row