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groupUniqArray
Syntax: groupUniqArray(x)
or groupUniqArray(max_size)(x)
Creates an array from different argument values. Memory consumption is the same as for the uniqExact function.
The second version (with the max_size
parameter) limits the size of the resulting array to max_size
elements.
For example, groupUniqArray(1)(x)
is equivalent to [any(x)]
.