For each customer who has a post-paid service, show how many of these customers have  opted to have their bills emailed compared to those who have theirs by postal mail. Name  this query Q3- PPBills.

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SQL Query

Structured Query Language is the full form of SQL. It is one of the standard languages to deal with the relational database. It is used to insert, update, delete, and search the records stored in a RDBMS. The relational databases are created and managed by using SQL.