Answer:
a- How many customer records are stored in the database
SQL Command for knowing number of customer records are stored is
SELECT COUNT(Customer Name) FROM tbl Customer ;
b- List customers who live in New york.
SQL Command for knowing number of customers who live in New york
SELECT Customer State, FROM tbl Customer WHERE CITY = 'New york' ;
c- List customers who credit limits grater than $50,000.
SQL Command for knowing number of customers who's credit limit is grater than $50,000
SELECT Customer Credit Limit, FROM tbl Customer WHERE Credit limit > 50,000 ;
d. List sales transaction made in July - 18
SQL Command for knowing sales in July - 18
SELECT InvoiceDate, FROM tbl Sales ;
e. What the number of total sales transactions made to each customer