How to extract the number and other particulars
I am trying to write a simple Select query that returns a list ofUsed EMPLOYEE_TABLE and in the second column names a count of the
number of entries for each employee in the EMPLOYEE_ATTENDANCE table.
Can anyone suggest how I might do this?
For example:
I have two tables EMPLOYEE_TABLE and EMPLOYEE_ATTENDENCE.
EMPLOYEE_TABLE:
emp_number emp_name
1A
2B
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 retrieve the list of employees with emp_name and the number of days
the employee came (ie the number of entries in the EMPLOYEE_ATTENDENCE table).
Some, such as:
A 3
B 1
A q
D 5
Select
a.emp_name, b.emp_attendence
Of
Employee_Name has,
(select emp_number, count (emp_number) "emp_attendence" of the employee_attendence by employee_number group) b
where a.emp_number = b.emp_number;
Kind regards
Navneet
Tags: Database
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