SQL Query to find second highest value

Question

Sir, I need your help to find the second highest value related to this query.

Here I writing query to find the customerName, ProductName and  ProductPrice.

  select A.customerName,B.productName,B.unitPrice  from tbl_Customer as A
 inner join tbl_custProductSales on A.customerId=tbl_custProductSales.customerId inner join
 tbl_Product as B on B.productId=tbl_custProductSales.productId

Like this I want to get the second highest productPrice, customer and productName

My result would be:

customer     product      second_highest_productRate
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