A_Create in PL/SQL a stored procedure called 'Del_Details' to delete the record of orderedProduct table for which it receives as input the order number (orderNO) and the product number (productNO).  B_ Create in PL/SQL a stored Function called 'productPerOrder' to return the number of products placed for any order its number is given as input. C_ Write a Trigger called ‘changeCustomer_Category’. This trigger should be invoked before any update of customer balance in customer table. Its job is to modify the category of a customer from B2 to B1 and from C2 to C1 when a customer's balance status drops below a certain threshold (-10000).

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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.