Keyword Analysis & Research: difference between primary key and unique key

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
difference between primary key and unique key	1.97	1	7110	32	45
difference	1.75	0.6	5397	41	10
between	1.48	0.9	9507	50	7
primary	1.7	1	9434	22	7
key	0.65	0.6	6290	88	3
and	0.72	0.3	4204	81	3
unique	1.24	0.1	653	1	6
key	1.1	0.5	7479	27	3

Keyword	CPC	PCC	Volume	Score
difference between primary key and unique key	1.28	0.2	5049	70