PostgreSQL – MIN() Function
PostgreSQL MIN() function is an aggregate function that returns the minimum value in a set of values.
Syntax: MIN(expression);
Now let’s look into some examples.For examples we will be using the sample database (ie, dvdrental).
Example 1:
The below query gets us the minimum amount paid by customers in the payment
table:
SELECT MIN(amount) FROM payment;
Output:
Example 2:
The following query gets the smallest payment paid by each customer:
SELECT customer_id, MIN(amount) FROM payment GROUP BY customer_id;
Output:
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