On spot queries based on windows function and subqueries were asked .

Case study like if there is a continuous decrease in the no. of recharges done for airtel sim in the past 3 months what you will do achieve the same no. of recharges as before the decline in no. of airtel customers happened?

Question

On spot queries based on windows function and subqueries were asked .

Case study like if there is a continuous decrease in the no. of recharges done for airtel sim in the past 3 months what you will do achieve the same no. of recharges as before the decline in no. of airtel customers happened?

Paytm

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