Calculate difference between 2 dates in SQL, excluding weekend days

Question

I would like to build an SQL query which calculates the difference between 2 dates, without counting the week-end days in the result.

Is there any way to format the

Answer 1

• Calculates the difference in days between the two dates
• Calculates the difference in week numbers and year numbers, subtracts the week numbers and then multiplies the result by 2 to calculate number of non-workdays between the two dates. If year numbers are different calculation of 52 * year difference + week number.

((sysdate - ced.created_dt) + ((((to_char(ced.created_dt,'IW') - ((to_char(sysdate,'YY') - to_char(ced.created_dt,'YY'))* 52)) - to_char(to_char(sysdate,'IW')))) * 2)) duration_in_weekdays