Keyword Analysis & Research: can we call function inside function in sql

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
can we call function inside function in sql	0.21	0.8	1608	10	43
can	1.52	0.8	7532	98	3
we	1.9	0.1	1572	4	2
call	0.78	0.3	1490	30	4
function	0.56	0.6	5236	45	8
inside	1.76	0.5	734	9	6
function	1.08	0.5	6059	41	8
in	0.78	0.4	7662	9	2
sql	1.34	0.6	9956	34	3

Keyword	CPC	PCC	Volume	Score
can we call function inside function in sql	2	0.1	6041	72