1. Using ch10_abc_markets database, write the SQL code to select the invoice year from inv_date with the column name invoiceYear, the invoice month from inv_date with the column name invoiceMonth, the invoice day from inv_date with the column name invoiceDay, and the sum of the invoice total with the column name invoiceTotal from the invoice table. Group the results by year, month, and day using the ROLLUP subclause.
QUESTION: What does the rollup subclause provide in terms of grouping and how does it differ from the CUBE subclause?
2. Using ch10_abc_markets database and invoice table, write the SQL code to select the invoice number, line number and the sum of the line price as sumLP. Group the results using grouping sets of invoice number and line number to show the sumLP by invoice number order.
QUESTION: What is the purpose of the GROUPING SETS subclause and what is its primary use?
3. What is data analytics? Briefly explain explanatory and predictive analytics.