Number of fridays between two dates

Question

How do I find the number of fridays between two dates(including both the dates) using a select statement in oracle sql?

Answer 1

See:

Why should I consider using an auxiliary calendar table?

The article's code is specifically for SQL Server but the techniques are portable to most SQL platforms.

With a Calendar table in place your query could be as simple as

SELECT COUNT(*) AS friday_tally
  FROM YourTable AS T1
       INNER JOIN Calendar AS C1
          ON C1.dt BETWEEN T1.start_date AND T1.end_date
 WHERE C1.day_name = 'Friday'; -- could be a numeric code