How to group result by some field and get only one from each group. For example we have group_id but i need to limit result (size = 50), and prevent multiple results with same 'group_id' value.
via Hovhannes Sanoyan
How to group result by some field and get only one from each group. For example we have group_id but i need to limit result (size = 50), and prevent multiple results with same 'group_id' value.
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