What is the relationship between opportunity line item and pricebook entry in Salesforce?

Hi Laveena,

1. OpportunitylineItem is junction object between opportunity and pricebookentry. As We need PricebookEntry Id and opportunity Id while creating OpportunityLineItems.

2. PricebookEntry is a junction object between Product2 and PriceBook.As we need Product2 Id and PriceBook2 Id while creating PricebookEntries.

Thanks.