Question description
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.
