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Arithmetic overflow error converting expression to data type smalldatetime!!!

Hi! i have a table that has a column with dates that where stored in a decimal type field! ... i've converted that columnn to nvarchar(50) and then parsed the the dates from '20040225' to
'2004-02-25' . That went ok. (the dates with the '20040225' where in a decimal type field...go figure!) ... but now ... after parsing the dates to the '2004-02-25' format, when i try to change the column from nvarchar(50) to smalldatetime i get the error: Arithmetic overflow error converting expression to data type smalldatetime.

I know this has something to do with some wrong date around somewhere. How can i find the wrong dates in my table? is there a query to do it? i know there is! ... please help!
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xjpmauricio
Asked:
xjpmauricio
1 Solution
 
Guy Hengel [angelIII / a3]Billing EngineerCommented:
you should create a additional column (with datetime), and update it:

update yourtable
  set new_field=  convert(datetime, yourfield, 120)

if that gives the same error, you need to identify the rows.
I would load the field into a test table:

create table test_date_values ( id int, year_value varchar(4), month_value varchar(2), day_value varchar(2))
insert into test_date_values select id, substring(yourfield, 1,4), substring(yourfield, 6,2), substring(yourfield, 9,2) from yourtable

and how, check the validity of the dates...
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xjpmauricioAuthor Commented:
--FIND INVALID DATES

create table test_date_values ( id int, year_value varchar(4), month_value varchar(2), day_value varchar(2))
insert into test_date_values select id,
substring(DATA_SITUACAO, 1,4), substring(DATA_SITUACAO, 6,2), substring(DATA_SITUACAO, 9,2) from FARQ_007D

select * from test_date_values where month_value  > 31

...the solution whas so simple that i think i'm such a dum bustard!!! god!....

thanks a lot!...
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