MySQL数据库

开发平台：

Visual C++

func_group.result：源码内容

							a	c	sum(a)
1	a	1
2	b	2
3	c	3
4	E	4
5	C	5
6	D	6
a	c	sum(a)
sum(a)
NULL
a
1
3
6
5
2
4
a
1
3
6
5
2
4
count(distinct a)	count(distinct grp)
6	3
count(distinct a)	count(distinct grp)
6	3
sum(a)	count(a)	avg(a)	std(a)	bit_or(a)	bit_and(a)	min(a)	max(a)	min(c)	max(c)
21	6	3.5000	1.7078	7	0	1	6		E
grp	sum(a)	count(a)	avg(a)	std(a)	bit_or(a)	bit_and(a)	min(a)	max(a)	min(c)	max(c)
NULL	0	0	NULL	NULL	0	0	NULL	NULL		
1	1	1	1.0000	0.0000	1	1	1	1	a	a
2	5	2	2.5000	0.5000	3	2	2	3	b	c
3	15	3	5.0000	0.8165	7	4	4	6	C	E
grp	sum
NULL	NULL
1	7
2	20
3	44.816496580928
grp	a	c
NULL	NULL	
1	2	a
2	5	c
3	9	E
2	3	c
id	avg(value1)	std(value1)
1	1.000000	0.816497
2	11.000000	0.816497
name	avg(value1)	std(value1)
Set One	1.000000	0.816497
Set Two	11.000000	0.816497
id	avg(rating)
1	3.0000
2	NULL
3	2.0000
count(*)
3
count(*)
1
count(*)
0
count(*)
0
count(a)
1
count(a)
0
count(a)
0
count(b)
2
count(b)
0
count(c)
0
COUNT(i)	i	COUNT(i)*i
1	1	1
COUNT(i)	(i+0)	COUNT(i)*(i+0)
1	1	1
sum(num)
147.58
sum(num)
50.15
45.63
51.80

						