How to fetch count along with other details

Question

I am trying to write a simple Select query that will return a list of
Employee Names from EMPLOYEE_TABLE,and in the second colum a count of the
number of entries for each employee in EMPLOYEE_ATTENDANCE table.
Can anybody suggest how I could do this?
For Example :
I have two tables EMPLOYEE_TABLE and EMPLOYEE_ATTENDENCE .
EMPLOYEE_TABLE:
emp_number emp_name
1 A
2 B
3 C
4 D
EMPLOYEE_ATTENDENCE :
emp_number emp_time
1 8.00
1 8.00
1 8.00
4 8.00
4 9.00
4
4
4
3
3
3
2
Now ,my requirement is I want to fetch the list of employees with emp_name and the number of days
the employee has come(i.e number of entries in the EMPLOYEE_ATTENDENCE table ).
Some like :
A 3
B 1
C 3
D 5

Answer 1

Just you have to join them and group it.
SQL> with emp
  2  as
  3  (
  4     select 1 no, 'A' name from dual
  5     union all
  6     select 2, 'B' from dual
  7     union all
  8     select 3, 'C' from dual
  9     union all
10     select 4, 'D' from dual
11  ),
12  emp_att
13  as
14  (
15     select 1 no, 8.00 tm from dual
16     union all
17     select 1, 8.00 from dual
18     union all
19     select 1, 8.00 from dual
20     union all
21     select 4, 8.00 from dual
22     union all
23     select 4, 9.00 from dual
24     union all
25     select 4, 0 from dual
26     union all
27     select 4, 0 from dual
28     union all
29     select 4, 0 from dual
30     union all
31     select 3, 0 from dual
32     union all
33     select 3, 0 from dual
34     union all
35     select 3, 0 from dual
36     union all
37     select 2, 0 from dual
38  )
39  select name,count(name)
40    from emp e, emp_att a
41   where e.no = a.no
42  group by name
43  order by name
44  /
N COUNT(NAME)
A           3
B           1
C           3
D           5