How do I use DCOUNT function

[SuhasKurse]

Date	Month	Day	Temperature	Rainfall	Flyers	Price	Sales	Revenue
1/1/2017	January	Sunday	27	2.00	15	0.3	10	$ 3.00
1/2/2017	January	Monday	28.9	1.33	15	0.3	13	$ 3.90
1/3/2017	January	Tuesday	34.5	1.33	27	0.3	15	$ 4.50
1/4/2017	January	Wednesday	44.1	1.05	28	0.3	17	$ 5.10
1/5/2017	January	Thursday	42.4	1.00	33	0.3	18	$ 5.40
1/6/2017	January	Friday	25.3	1.54	23	0.3	11	$ 3.30
1/7/2017	January	Saturday	32.9	1.54	19	0.3	13	$ 3.90
1/8/2017	January	Sunday	37.5	1.18	28	0.3	15	$ 4.50
1/9/2017	January	Monday	38.1	1.18	20	0.3	17	$ 5.10

How can I use DCount function to find number unique days. I am expection answer 7

Continue reading...