I'm reading up on the SysSchedules table in the Microsoft API, and am trying to incorporate using this table in a query.

In the documentation, the Freq_Interval column seems to be defined out for when a single day is selected in the schedule and the Freq_Type is weekly. But what are the values for every other combination of days when more than one day is selected?

For example, I have a job which is scheduled to occur weekly on the days Monday, Tuesday, Wednesday, Thursday, and Friday. I see in the MSDB.dbo.SysSchedules table, it has a Freq_Interval of 62 (which isn't listed in the documentation.)

Job Schedule Details MSDB.dbo.SysSchedules

1 Answer 1


The documentation states

freq_interval is one or more of the following:

1 = Sunday
2 = Monday
4 = Tuesday
8 = Wednesday
16 = Thursday
32 = Friday
64 = Saturday

These values are all powers of 2.

When you select multiple days simply add the distinct codes.

2 + 4 + 8 + 16 + 32 = 62

or alternatively use the bitwise or operator to combine them.

2 | 4 | 8 | 16 | 32

(my recommendation would be to use | in code and + if adding them up in your head! - | is the "correct" thing to use and won't behave incorrectly if you have duplicate values in the list)

If you are trying to do the reverse operation you need bitwise and

        @Monday TINYINT = 2,
        @Tuesday TINYINT = 4,
        @Wednesday TINYINT = 8,
        @Thursday TINYINT = 16,
        @Friday TINYINT = 32,
        @Saturday TINYINT = 64;

DECLARE @TestValue TINYINT = 62;

SELECT CASE WHEN @TestValue & @Sunday = @Sunday THEN 'Y' ELSE 'N' END AS Sunday,
       CASE WHEN @TestValue & @Monday = @Monday THEN 'Y' ELSE 'N' END AS Monday,
       CASE WHEN @TestValue & @Tuesday = @Tuesday THEN 'Y' ELSE 'N' END AS Tuesday,
       CASE WHEN @TestValue & @Wednesday = @Wednesday THEN 'Y' ELSE 'N' END AS Wednesday,
       CASE WHEN @TestValue & @Thursday = @Thursday THEN 'Y' ELSE 'N' END AS Thursday,
       CASE WHEN @TestValue & @Friday = @Friday THEN 'Y' ELSE 'N' END AS Friday,
       CASE WHEN @TestValue & @Saturday = @Saturday THEN 'Y' ELSE 'N' END AS Saturday
  • Great answer, thank you! When I first saw how they spaced out that enum I was wondering if it was something like a bitwise operation. But I'm not super experienced using that type of operation and didn't think much more into it. Cool that'll work though, thanks.
    – J.D.
    Mar 6, 2019 at 4:09

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