1581. Customer Who Visited but Did Not Make Any Transactions | Leetcode | Hindi

Write a solution to find the IDs of the users who visited without making any transactions and the number of times they made these types of visits.
Return the result table sorted in any order.
transaction_id is column with unique values for this table.
This table contains information about the transactions made during the visit_id.
Problem link - leetcode.com/p...
Solution -
select v.customer_id, count(*) as count_no_trans
from Visits v
left join
Transactions t
on
v.visit_id = t.visit_id
where t.transaction_id is null
group by customer_id
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