In article <[EMAIL PROTECTED]>, [EMAIL PROTECTED] writes: > Both methods you describe are the commonly used techniques to solve your > particular problem. Every RDBMS system I have used responds in exactly the > same way to your query.
> A) a database should not respond with data it does not have. Correct. > B) I don't know of a SQL statement (in any SQL dialect) that > auto-generates a list of dates (or any other series of values) that you > could use in this situation. PostgreSQL has a set-returning function named generate_series which can be used on the left-hand side of a LEFT JOIN. Since MySQL doesn't seem to have something like that, I often do the following: * Once and for all create a table containg just integer values, e.g. from -50000 to +50000. * Use a WHERE clause to extract a table slice for the number of days you need * Use the date functions to convert the table slice to the dates you want * Use that on the left-hand side of a LEFT JOIN -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
