Oracle : Ошибка ORA-30486


"invalid window aggregation group in the window specification"
*Cause: If the window specification is specified
using RANGE option and there are multiple ORDER BY expressions, then
the aggregation group cannot contain any expression (It can only
have CURRENT ROW, UNBOUNDED PRECEDING, or UNBOUNDED FOLLOWING).
First end point (bound) cannot be UNBOUNDED FOLLOWING and second end
point cannot be UNBOUNDED PRECEDING. If the first end point is
CURRENT ROW, then second end point can only be CURRENT ROW or
/UNBOUNDED FOLLOWING. If the first end point is FOLLOWING,
then second end point can only be /UNBOUNDED FOLLOWING.
*Action:

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