Common mistake in Aggregate Functions as Window Functions

Window Functions

Aggregate Functions as Window Functions: Mistakes

Using GROUP BY when window function needed Use aggregate with OVER to keep all rows GROUP BY collapses rows. Window functions keep all rows. Use window function

Using GROUP BY when window function needed

Use aggregate with OVER to keep all rows

GROUP BY collapses rows. Window functions keep all rows.

Use window functions to preserve rows

Medium

Rows collapsed