Sql Server Operand type clash: date is incompatible with int

Question

When I try to execute this code I get an error at the 'with DateDimension' line:

Msg 206, Level 16, State 2, Line 15
Operand type clash: date is incompatible with int

This is the SQL query I am using:

declare @DateCalendarStart  date,
        @DateCalendarEnd    date,
        @FiscalCounter      date,
        @FiscalMonthOffset  int;

set @DateCalendarStart = '2011-01-28';
set @DateCalendarEnd = '2012-10-26';


set @FiscalMonthOffset = 3;

with DateDimension //Error got this line 

as

(
    select  @DateCalendarStart as DateCalendarValue,
            dateadd(m, @FiscalMonthOffset, @DateCalendarStart) as FiscalCounter

    union all

    select  DateCalendarValue + 1,
            dateadd(m, @FiscalMonthOffset, (DateCalendarValue + 1)) as FiscalCounter
    from    DateDimension 
    where   DateCalendarValue + 1 < = @DateCalendarEnd
)

Answer 1

Your problem is with the DateCalendarValue + 1 portion. Try using DATEADD() , as below:

declare @DateCalendarStart  date,
        @DateCalendarEnd    date,
        @FiscalCounter      date,
        @FiscalMonthOffset  int;

set @DateCalendarStart = '2011-01-28';
set @DateCalendarEnd = '2012-10-26';

-- Set this to the number of months to add or extract to the current date to get the beginning 
-- of the Fiscal Year. Example: If the Fiscal Year begins July 1, assign the value of 6 
-- to the @FiscalMonthOffset variable. Negative values are also allowed, thus if your 
-- 2012 Fiscal Year begins in July of 2011, assign a value of -6.
set @FiscalMonthOffset = 3;

with DateDimension 

as

(
    select  @DateCalendarStart as DateCalendarValue,
            dateadd(m, @FiscalMonthOffset, @DateCalendarStart) as FiscalCounter

    union all

    select  DATEADD(DAY, 1, DateCalendarValue), -- Using a DATEADD() function here works for SQL Server
            DATEADD(m, @FiscalMonthOffset, (DATEADD(DAY, 1, DateCalendarValue))) as FiscalCounter
    from    DateDimension 
    where   DATEADD(DAY, 1, DateCalendarValue) < = @DateCalendarEnd
)

SELECT * FROM DateDimension OPTION (MAXRECURSION 1000)

EDIT: I don't know if your original code was going to use the MAXRECURSION option or not, but if you didn't know already I would recommend you read this . Basically, in this circumstance it means that you can list out 1,000 dates with the CTE. If you need more than that, you'll have to change that 1000 to match your needs.