How to insert NULL when using bcp_moretext?

How do you insert a NULL value when using bcp_moretext?
If I have a table with two 'text' or 'image' columns, and I am using bcp_mor
etext to insert a very large LOB into one of them, then BCP requires that I
use bcp_moretext for both of them ("use it for one 'text'/'image', then must
use it for all").
(In fact, I've discovered that I can bcp_bind a NULL with a non-NULL vardata
address for earlier 'text'/'image', but once I bcp_bind a NULL vardata, ind
icating my wish to use bcp_moretext, then all following 'text'/'image' colum
ns in ordinal order must al
so be bound with a NULL vardata -- i.e. once you use bcp_moretext for a 'tex
t'/'image', it's really all *following* that must be also sent with bcp_more
text. At least that's the behavior I see.)
I'm using the SQL Server 7 ODBC driver extensions (rather than 6.5 DB-LIB BC
P). Setting the param length to zero (bcp_bind or bcp_collen) for 7.0 BCP te
lls it that you are sending a zero-length param. You still need to call bcp_
moretext later with length
0, for that column. Setting length to SQL_NULL_DATA will cause an error late
r, whether you try to call bcp_moretext with length SQL_NULL_DATA, with leng
th 0, or try to skip calling bcp_moretext for this column.
I don't believe it's possible to send NULL, via BCP, to a 'text' or 'image'
column, once you've sent 0 or >0 length data to any earlier (in ordinal orde
r) 'text' or 'image' column using bcp_moretext. But, I would like Microsoft
to verify this, since the d
ocumentation doesn't cover this at all.
Thanks,
Jim FloodCan I expect some sort of response from Microsoft in this group within two d
ays, as part of the benefit of my MSDN subscription?
-- Jim Flood wrote: --
How do you insert a NULL value when using bcp_moretext?
If I have a table with two 'text' or 'image' columns, and I am using bcp_mor
etext to insert a very large LOB into one of them, then BCP requires that I
use bcp_moretext for both of them ("use it for one 'text'/'image', then must
use it for all").
(In fact, I've discovered that I can bcp_bind a NULL with a non-NULL vardata
address for earlier 'text'/'image', but once I bcp_bind a NULL vardata, ind
icating my wish to use bcp_moretext, then all following 'text'/'image' colum
ns in ordinal order mu
st also be bound with a NULL vardata -- i.e. once you use bcp_moretext for a
'text'/'image', it's really all *following* that must be also sent with bcp
_moretext. At least that's the behavior I see.)
I'm using the SQL Server 7 ODBC driver extensions (rather than 6.5 DB-LIB BC
P). Setting the param length to zero (bcp_bind or bcp_collen) for 7.0 BCP te
lls it that you are sending a zero-length param. You still need to call bcp_
moretext later with le
ngth 0, for that column. Setting length to SQL_NULL_DATA will cause an error
later, whether you try to call bcp_moretext with length SQL_NULL_DATA, with
length 0, or try to skip calling bcp_moretext for this column.
I don't believe it's possible to send NULL, via BCP, to a 'text' or 'image'
column, once you've sent 0 or >0 length data to any earlier (in ordinal orde
r) 'text' or 'image' column using bcp_moretext. But, I would like Microsoft
to verify this, since
the documentation doesn't cover this at all.
Thanks,
Jim Flood|||I'm checking with our BCP guy.
Brannon Jones
Developer - MDAC
This posting is provided "as is" with no warranties and confers no rights.
"Jim Flood" <bezspam@.bezspam.cz> wrote in message
news:C95C8F5A-BF58-48F3-A516-AC5980947BDE@.microsoft.com...
> Can I expect some sort of response from Microsoft in this group within two
days, as part of the benefit of my MSDN subscription?
> -- Jim Flood wrote: --
> How do you insert a NULL value when using bcp_moretext?
> If I have a table with two 'text' or 'image' columns, and I am using
bcp_moretext to insert a very large LOB into one of them, then BCP requires
that I use bcp_moretext for both of them ("use it for one 'text'/'image',
then must use it for all").
> (In fact, I've discovered that I can bcp_bind a NULL with a non-NULL
vardata address for earlier 'text'/'image', but once I bcp_bind a NULL
vardata, indicating my wish to use bcp_moretext, then all following
'text'/'image' columns in ordinal order must also be bound with a NULL
vardata -- i.e. once you use bcp_moretext for a 'text'/'image', it's really
all *following* that must be also sent with bcp_moretext. At least that's
the behavior I see.)
> I'm using the SQL Server 7 ODBC driver extensions (rather than 6.5
DB-LIB BCP). Setting the param length to zero (bcp_bind or bcp_collen) for
7.0 BCP tells it that you are sending a zero-length param. You still need to
call bcp_moretext later with length 0, for that column. Setting length to
SQL_NULL_DATA will cause an error later, whether you try to call
bcp_moretext with length SQL_NULL_DATA, with length 0, or try to skip
calling bcp_moretext for this column.
> I don't believe it's possible to send NULL, via BCP, to a 'text' or
'image' column, once you've sent 0 or >0 length data to any earlier (in
ordinal order) 'text' or 'image' column using bcp_moretext. But, I would
like Microsoft to verify this, since the documentation doesn't cover this at
all.
> Thanks,
> Jim Flood|||Hello Brannon,
Have you heard back about the BCP problem yet? Is there anything else I need
to do besides post to this group, to get the two-day response from Microsof
t? It's been well over two days.
Thanks,
Jim Flood|||Hi Jim,
I've faced the same problem. I can't insert NULLs using bcp_moretext.
Have you found a solution?
Thanks in advance,
Alberto.
"Jim Flood" <anonymous@.discussions.microsoft.com> escribi en el mensaje
news:0BB0853D-430D-4299-88D2-7343C6C024A8@.microsoft.com...
> How do you insert a NULL value when using bcp_moretext?
> If I have a table with two 'text' or 'image' columns, and I am using
bcp_moretext to insert a very large LOB into one of them, then BCP requires
that I use bcp_moretext for both of them ("use it for one 'text'/'image',
then must use it for all").
> (In fact, I've discovered that I can bcp_bind a NULL with a non-NULL
vardata address for earlier 'text'/'image', but once I bcp_bind a NULL
vardata, indicating my wish to use bcp_moretext, then all following
'text'/'image' columns in ordinal order must also be bound with a NULL
vardata -- i.e. once you use bcp_moretext for a 'text'/'image', it's really
all *following* that must be also sent with bcp_moretext. At least that's
the behavior I see.)
> I'm using the SQL Server 7 ODBC driver extensions (rather than 6.5 DB-LIB
BCP). Setting the param length to zero (bcp_bind or bcp_collen) for 7.0 BCP
tells it that you are sending a zero-length param. You still need to call
bcp_moretext later with length 0, for that column. Setting length to
SQL_NULL_DATA will cause an error later, whether you try to call
bcp_moretext with length SQL_NULL_DATA, with length 0, or try to skip
calling bcp_moretext for this column.
> I don't believe it's possible to send NULL, via BCP, to a 'text' or
'image' column, once you've sent 0 or >0 length data to any earlier (in
ordinal order) 'text' or 'image' column using bcp_moretext. But, I would
like Microsoft to verify this, since the documentation doesn't cover this at
all.
> Thanks,
> Jim Flood|||Hello Alberto,
If all of your NULLs are lined up contiguous to the left in the set of colum
ns for a given row, then just avoid bcp_moretext for those columns -- althou
gh, according to the documentation, this isn't supposed to work. But, once y
ou've set bcp_moretext for
a column, going left-to-right, then all other columns to the right will have
to be bcp_moretext'ed as well, and then you can't set any of them to NULL.
So, I have no solution.
Can I please get some kind of response from Microsoft on this problem? I bel
ieve my MSDN subscription should guarantee a two-day response time, and it h
as been *far* more than two days.
Jim Flood

How to Insert Null Values into a DataBase Field

I have a function that updates a table in sql server

If a field is left blank I want the database field set to Null. I use:
sqlCmd.Parameter.Add("@.somefield, someintvalue) to pass all my values to the database.

if someintvalue is null I want to set @.somefield to dbnull

How can I do this? I get errors if I submit a null integer when there is a foreign key constraint. What is the best way to handle this? should I just make all parameters objects? so that I can set them to DBNull.Value?

Also on a side note, when you are populating fields from a datatable, is there a better way to set the values (i.e. of a textbox) than cheking for DBNull before assigning?

check this out|||

FOREIGN KEY can allow NULL values if it is a UNIQUE constraint. Run a search in the BOL(books online) enable NULL on FOREIGN KEY. The following is from the BOL. Hope this helps.

"A FOREIGN KEY constraint does not have to be linked only to a PRIMARY KEY constraint in another table; it can also be defined to reference the columns of a UNIQUE constraint in another table. A FOREIGN KEY constraint can containnull values; however, if any column of a composite FOREIGN KEY constraint containsnull values, then verification of the FOREIGN KEY constraint will be skipped."

sql

how to insert null value into database?

hi guys. i'm using vb.net with vs 2003 and MSSQL Managment Studio Express as my database server.
i want to insert null value into database, so i use System.DBNull.Value
but it doesn't show NULL, but a empty field. I tried System.DBNull.Value.ToString, it gives me same result.
what can i do to have NULL in that field?
thanks for any advise, i would appreciate it very much.

Hello,

If you use an INSERT statement and don't mention the columns you want null values in then they will contain null values for the inserted row.

--Bonnie

|||Could you please show us your query ? I am not sure, from which application you want to insert the NULL value, either through code (then we need your code to investigate your problem) or through the GUI (then you will simply have to press STRG+0 staying inside the actual data cell)

Jens K. Suessmeyer

http://www.sqlserver2005.de

How to insert NULL char values in SQLSERVER with a SQL sentence?

Hi everyone!
I am working with Delphi v7 and MS SQLServer.
I am trying to insert data in a table with a SQL sentence. Some of the
fields of my table are type char or varchar, and they can have null
values.
What do i have to write in the SQL sentence to insert a null value in
those fields?
I tried with '', an empty String, but it doesnt work, the tables
stores an empty String (logical :-)).
In the SQLServer GUI you have to press CTRL + 0 to insert a NULL
value, but how can i tell this to the SQLServer through a SQL
Sentence?

Well, thank you very much.On 29 Jul 2004 04:15:15 -0700, schumacker wrote:

>Hi everyone!
>I am working with Delphi v7 and MS SQLServer.
>I am trying to insert data in a table with a SQL sentence. Some of the
>fields of my table are type char or varchar, and they can have null
>values.
>What do i have to write in the SQL sentence to insert a null value in
>those fields?
>I tried with '', an empty String, but it doesnt work, the tables
>stores an empty String (logical :-)).
>In the SQLServer GUI you have to press CTRL + 0 to insert a NULL
>value, but how can i tell this to the SQLServer through a SQL
>Sentence?
>Well, thank you very much.

Hi schumacker,

INSERT INTO MyTable (Col1, Col2, Col3)
VALUES (1, NULL, 3)

or

INSERT INTO MyTable (Col1, Col2, Col3)
SELECT 1, NULL, 3

Best, Hugo
--

(Remove _NO_ and _SPAM_ to get my e-mail address)|||Given:

create table foo
(col1 char(1) not null,
col2 char(1) null)

you can insert nulls to col2 by either explicitly specifying a null for the
content:

insert foo (col1, col2) values ('a',null)

or by skipping it in the column list and SQL Server will automatically
insert null:

insert foo (col1) values ('b')

Check it:

select * from foo

outputs:

col1 col2
-- --
a NULL
b NULL

"schumacker" <miguelcampoy@.hotmail.com> wrote in message
news:e1eadaf3.0407290315.99cd0d2@.posting.google.co m...
> Hi everyone!
> I am working with Delphi v7 and MS SQLServer.
> I am trying to insert data in a table with a SQL sentence. Some of the
> fields of my table are type char or varchar, and they can have null
> values.
> What do i have to write in the SQL sentence to insert a null value in
> those fields?
> I tried with '', an empty String, but it doesnt work, the tables
> stores an empty String (logical :-)).
> In the SQLServer GUI you have to press CTRL + 0 to insert a NULL
> value, but how can i tell this to the SQLServer through a SQL
> Sentence?
> Well, thank you very much.

How to INSERT DBNull.Values ? ...

Hello,

If I have a database table with column that can accept null values and I want to insert a null value into that column, what is the correct syntax?

db_cmd = New SqlCommand( "sp_stored_procedure", db_connection )
db_cmd.CommandType = CommandType.StoredProcedure
db_cmd.Parameters.Add( "@.col_to_set_to_null", ? )

ie: what expression can be used for "?"

Ideally, I want to check if a string value is empty and if so insert a null, but I have yet to see any examples, ie:

if ( str.empty ) then
insert DBNull.value into column
else
insert str into column
end if

Sincerely,

Brent D.db_cmd.Parameters.Add( "@.col_to_set_to_null", System.DBNull.Value )

how to insert a NULL in a table

hello,
in a table i have a field of type bit which allows NULL.
if a new record is created and the field is not set a NULL value is created.
Now my question: if the field was set to the value 0 or 1 how can i reset
that field manualy to NULL. Can i use some key STRG + ...?
thanksUsing the Enterprise manager you can use STRG + 0 to insert a NULL,
using an update statement it would be:
UPDATE Sometable SET SomeColumn = NULL Where is = SomeIdValue
HTH, Jens Suessmeyer.
http://www.sqlserver2005.de
--|||thanks for your help
"Jens" wrote:

> Using the Enterprise manager you can use STRG + 0 to insert a NULL,
> using an update statement it would be:
> UPDATE Sometable SET SomeColumn = NULL Where is = SomeIdValue
> HTH, Jens Suessmeyer.
> --
> http://www.sqlserver2005.de
> --
>|||Through the GUI its usually CTRL 0 together.
With command line its
UPDATE <table>
SET yourcol = NULL
WHERE ...
Tony.
Tony Rogerson
SQL Server MVP
http://sqlserverfaq.com - free video tutorials
"Xavier" <Xavier@.discussions.microsoft.com> wrote in message
news:B7AB5BA4-8AAB-425C-9668-1C435E96A613@.microsoft.com...
> hello,
> in a table i have a field of type bit which allows NULL.
> if a new record is created and the field is not set a NULL value is
> created.
> Now my question: if the field was set to the value 0 or 1 how can i reset
> that field manualy to NULL. Can i use some key STRG + ...?
> thanks
>|||thanks Toni
"Tony Rogerson" wrote:

> Through the GUI its usually CTRL 0 together.
> With command line its
> UPDATE <table>
> SET yourcol = NULL
> WHERE ...
> Tony.
> --
> Tony Rogerson
> SQL Server MVP
> http://sqlserverfaq.com - free video tutorials
>
> "Xavier" <Xavier@.discussions.microsoft.com> wrote in message
> news:B7AB5BA4-8AAB-425C-9668-1C435E96A613@.microsoft.com...
>
>