expression is not valid

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
expression is not valid	1.04	1	7036	1	23
expression	1.11	1	2296	49	10
is	0.78	0.4	8472	17	2
not	0.41	0.1	4748	43	3
valid	1.29	0.9	4985	3	5

Keyword	CPC	PCC	Volume	Score
expression is not valid	1.54	0.2	6799	6
is not a valid group by expression	1.15	0.3	2600	14
argument expression is not valid	0.56	0.2	2997	27
the assignment expression is not valid	0.09	0.6	3623	98
argument expression is not a valid value	0.52	0.3	3394	73
zz123456 is not a valid expression	0.28	0.1	1555	96
uu12345678 is not a valid expression	0.34	0.2	8803	27
is not a valid group by expression sql	0.44	0.1	2639	35
is not a valid group by expression error	0.86	0.4	521	50
sql error is not a valid group by expression	0.17	0.9	3429	49
column is not a valid group by expression	1.43	0.2	9274	13
ok.x is not a valid expression	1.22	0.2	1144	10
m12345678 is not a valid expression	1.6	0.9	4096	49