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Showing posts with the label REPEAT CUSTOMER & NEW CUSTOMER -SQL Interview Question -

REPEAT CUSTOMER & NEW CUSTOMER -SQL Interview Question -

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D  ay-2: Question-2: Date-5th Nov 2022 New and repeat customers Count from a customer table. create table customer_orders ( order_id integer, customer_id integer, order_date date, order_amount integer ); select * from customer_orders insert into customer_orders values(1,100,cast('2022-01-01' as date),2000),(2,200,cast('2022-01-01' as date),2500),(3,300,cast('2022-01-01' as date),2100) ,(4,100,cast('2022-01-02' as date),2000),(5,400,cast('2022-01-02' as date),2200),(6,500,cast('2022-01-02' as date),2700) ,(7,100,cast('2022-01-03' as date),3000),(8,400,cast('2022-01-03' as date),1000),(9,600,cast('2022-01-03' as date),3000) select * from customer_orders Select a.order_date, Sum(Case when a.order_date = a.first_order_date then 1 else 0 end) as new_customer, Sum(Case when a.order_date != a.first_order_date then 1 else 0 end) as repeat_customer from( Select customer_id, order_date, min(order_date) over(partition by cust...