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Considerations for RUNNINGAVG
Equivalent Result
The result of RUNNINGAVG is equivalent to:
RUNNINGSUM(column-expr) / RUNNINGCOUNT(*)
Example of RUNNINGAVG
Return the average of nonnull values of I1 up to and including the current row:
SELECT RUNNINGAVG (I1) AS AVG_I1
FROM mining.seqfcn
SEQUENCE BY TS;
AVG_I1
--------------------
--- 5 row(s) selected.
RUNNINGCOUNT Function
The RUNNINGCOUNT function is a sequence function that returns the number of rows up to
and including the current row of an intermediate result table ordered by a SEQUENCE BY clause
in a SELECT statement. See
RUNNINGCOUNT is a Neoview SQL extension.
RUNNINGCOUNT {(*) | (column-expression)}
*
as an argument causes RUNNINGCOUNT(*) to return the number of rows in the intermediate
result table up to and including the current row.
column-expression
specifies a derived column determined by the evaluation of the column expression. If
column-expression is the argument, RUNNINGCOUNT returns the number of rows
containing nonnull values of column-expression in the intermediate result table up to
and including the current row.
Considerations for RUNNINGCOUNT
No DISTINCT Clause
The RUNNINGCOUNT sequence function is defined differently from the COUNT aggregate
function. If you specify DISTINCT for the COUNT aggregate function, duplicate values are
eliminated before COUNT is applied. Note that you cannot specify DISTINCT for the
RUNNINGCOUNT sequence function; duplicate values are counted.
Example of RUNNINGCOUNT
Return the number of rows that include nonnull values of I1 up to and including the current row
:
SELECT RUNNINGCOUNT (I1) AS COUNT_I1
FROM mining.seqfcn
396
SQL Functions and Expressions
6215
17194
11463
9746
10190
"SEQUENCE BY Clause" (page
268).
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