ROUND FUNCTION why is there a 1.0 in ROUND(1.0 *


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I understand the ROUND function, but I don’t understand why is there a 1.0 * after the parenthesis? It’s my understanding that for ROUND(column_name, 2). Can anyone help?

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select name, round(1.0 * count(distinct order_id) /
count(distinct orders.delivered_to), 2) as reorder_rate
from order_items
join orders on = order_items.order_id
group by 1
order by 2 desc;


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It’s a way to force a float.

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