If you want to count something inside a group (something the same as auto_increment from mysql), you can use row_number
OVER (PARTITION BY ur_prnt_uid_id ORDER BY ur_chld_uid_id)
In memoriam – 3 - My father-in-law died a few weeks ago, aged 95. This is the story that he wrote for his children and grandchildren a few years ago describing his experienc...
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