Question

I have a dynamic sql query in SQL Server. So I build it, set it to a varible and then I attempt to format a where clause based on a date. However, when I attempt to do this, I get “The multi-part identifier ‘FIELD NAME” can not be bound. I beleive this is because the actual tables are in a dynamic from claus so they can’t be seen until it is compiled. Any way around this?

Here I am attempting to say, give me all Persons where DOB between YEAR+MONTH specified, for example, 201001 and 201012 would be the entire year of 2010. Here is the code in part….

    ALTER PROCEDURE get_persons_by_search_criteria

@month_from as nvarchar(2) = null,
@year_from as nvarchar(4) = null,
@month_to as nvarchar(2) = null,
@year_to as nvarchar(4) = null


AS

declare @from_date varchar(10)
declare @to_date varchar(10)
declare @sqlstr varchar(5000)

set @sqlstr = ' SELECT     
    Person.PersonID, 
    Person.FirstName, 
    Person.LastName, 
FROM    Person '

--Attemtping to create a value like 201108 (year + month)
set @from_date = Convert(VarChar(10), @year_from) + Replace(Str(@month_from, 2), ' ', '0')  
set @to_date = Convert(VarChar(10), @year_to) + Replace(Str(@month_to, 2), ' ', '0') 

set @sqlstr = @sqlstr +  ' WHERE '
set @sqlstr = @sqlstr + Convert(VarChar(10), Person.DOBYear) + Replace(Str(Person.DOBMonth, 2), ' ', '0') 
set @sqlstr = @sqlstr + ' BETWEEN '   + @from_date + ' and ' + @to_date


exec(@sqlstr)

Answer 1

This line gives the error, because the PERSON table is not open when you build the dynamic string.

set @sqlstr = @sqlstr + Convert(VarChar(10), Person.DOBYear) + Replace(Str(Person.DOBMonth, 2), ' ', '0')

Try this

set @sqlstr = @sqlstr + ' Convert(VarChar(10), Person.DOBYear) + Replace(Str(Person.DOBMonth, 2), '' '', ''0'') '

Should do the trick for you..