How To Specify An Empty String As A Default Column Value?
Dec 6, 2007In the Column Properties window's 'Default Value or Binding' property, how do you specify an empty string?
Thanks.
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Default Empty String Value For Varchar Columns
Jun 4, 2008Hi guys,
Is there a way to declare a default value of empty string '' for a varchar table column?
Thanks,Kevin
DB Design :: What Is Default Database Value For Empty String
Sep 10, 2015What is the format for the SQL Server empty string default value?
View 4 Replies View RelatedDefault To NULL Instead Of Blank/empty String During Flat File Import
Aug 15, 2006Hi,
In SSIS flat file import using fastload, I'm trying to import data into SQL 2005 previously created tables.
The table may contain column that are NULLable BUT there is NO DEFAULT for them.
If the incoming data from flat files contains nothing either between the delimeters, how can I have a NULL value inserted in the column instead of blank/empty string?
I didn't find an easy flag unless I'm doing something wrong. I know of at least two ways to do it the hard way:
1- set the DEFAULT(NULL) for EVERY column that needs this behaviour
2-set up some Derived Column option in the package to return NULL if the value is missing.
Both of the above are time consuming since I'm dealing with many tables. Is there a quick option to default the value to NULL WHEN there is NO data ELSE insert the data itself? So the same behavior that I have right now except that I want NULL in place of empty string/blank in the varchar(x) columns.
Thanks
Anatole
Derived Column Logic To Replace Empty String With Null?
Nov 7, 2006Ok.. so I have a fixed position data feed. I read the file in as just whole rows initially, process a specific position and evaluate a conditional split to determine direction of the file for proper processing (file contains multiple recors with different layouts). This all works fine. I then use the derived column feature to process all the columns.
Most of the columns are as simple as SUBSTRING(RecordData,1,10) for example to get the first column. This all works for string data. I then have a column that is a date field. The problem occurs that the code SUBSTRING(RecordData,20,10) returns either a date or empty set of data if no date was in the original file. When this gets sent to the OLEDB connection (SQL Server 2005) into the date field it fails. If the record has a date it works, but if it is empty it fails the insert.
I tried to replace empty strings with NULLs with this code. REPLACE(TRIM(SUBSTRING(RecordData,20,10)),"",NULL(DT_WSTR,10)). This does not work. So my question is how do I bring a date field from a fixed flat file into a SQL datetime field using a derived column? More specifically is how do I set it to NULL if its empty data? When I use the above code it inserts all the rows from the file, but it sets all rows to NULL not just the empty ones.
Thanks.
Setting Default Value (concatenated String) Of Column Using UDF
Oct 23, 2005Hello,
I'm trying to set the default value of a column (SysInvNum) in a table (caseform) of mine by concatenating 3 other fields in the same table. These other fields are all Integer datatypes. they are "CaseYear" e.g. (2005), "InvNum" e.g. (0001) and "PostId" e.g. (5).
So basically the SysInvNum column for this row should read '200500015'
When I run a basic query using the CAST or CONVERT functions like this:
SELECT convert (varchar,caseyear) + convert(varchar,InvNum) + convert(varchar,postid) from caseform
OR
SELECT cast(caseyear as varchar(4)) + cast(InvNum as varchar(4)) + cast(postid as varchar(1)) from caseform
I get the results I want. But since I want this value to be the default value of the column, I tried inserting this: convert (varchar,caseyear) + convert(varchar,InvNum) + convert(varchar,postid) into the default value parameter of the column in the caseform table. The result is a string that is the query itself.
I then tried creating a UDF called getsysinvnum() where I declare and set 2 variables whilst returning one of the variables as a varchar. An example of what it looks like is this:
CREATE FUNCTION GetSysInvNum()
RETURNS varchar
AS
BEGIN
DECLARE @maxcaseid Int
DECLARE @sysinvnum varchar
SELECT @maxcaseid = max (caseid) from caseform
SELECT @sysinvnum = cast(caseyear as varchar(4)) + cast(invnum as varchar(4)) + cast(postid as varchar(1)) from caseform where caseid = @maxcaseid
RETURN @sysinvnum
END
The result I get when I plug this into the default value of the column as : ([dbo].[getsysinvnum]()) is "2".
Yes it returns the number "2" could someone please tell me what I am doing wrong, or suggest a better way for me to do this?
Thanks in advance
'Wale
String Or Binary Data Would Be Truncated When Using Default Column Definition
Nov 22, 2007
When I set a column to have a default definition that uses a UDF, I am receiving the "String or binary data would be truncated" error.
The UDF:
Code BlockALTER FUNCTION GetDefaultClientTier
(
@ClientAssets decimal(15,2)
)
RETURNS char(1)
AS
BEGIN
DECLARE @Result char(1)
-- Get the first result in case of overlaps.
SET @Result = CAST((SELECT TOP 1 ClientTier FROM ClientTiers WHERE @ClientAssets BETWEEN ClientAssetsFloor AND ClientAssetsCeiling) AS char(1))
RETURN @Result
END
ClientTier is defined as char(1) in the table. I simply have (isnull([dbo].[GetDefaultClientTier]([ClientAssets])),(null))) as the definition. I can't use a computed column because I the values need to be editable. When inserting with SSIS, the insert works fine but the column has a value of null for each row.
When putting a character as the default (like 'A') the insert works fine.
The cast is there only because I have tried everything I can think of to get around this.
Is there something simple I am overlooking?
(SQL2005 SP2)
Thanks!
What Does A Stored Procedure Recieve From A SqlDataSource Who's Parameter Is Empty And No Default Value Set?
Nov 24, 2006If a sqldatasource is programed to send textbox1.text to a stored procedure, and the .text property is left empty, and there is no default value set for the parameter, what exactly is the stored procedure receiving?I would like to run a IF BEGIN statement on the value of the parameter in the stored procedure but the following does not work:IF @Parameter IS NULL BEGINor IF @Parameter = '' BEGINThe only way I've gotten it to work is if I set the default value of the parameter being sent to a specific alphanumeric value. Then do something like:IF @Parameter = '99' BEGIN<Code Here>END
View 4 Replies View RelatedEmpty String To Null
Jul 11, 2001example
create view v_GuestOrder
as
Select T1.id_Guest,T2.OrderName
from Guest T1
left join Order T2 T2.id_order = T1.Id_order
select * from v_GuestOrder
--
Id_Guest OrderName
-------- -----
1 spoon
2 phone
3
4 tv
I need something similar to
Select
id_Guest,
case orderName
when '' then Null -- Sql server gives error in thsi case
end as orderName
from v_GuestOrder
So I need to assign NULL to OrderName is query return empty string,
it will be treated by Crystal reports as Null
Please help , thanks
Bcp Out Empty String Into Csv Files
Jun 19, 2008I have a SQL Server table with nvarchar type column which has not null constraint. I am inserting empty string ("") from Java to the table column. When I export this table into .csv file using bcp tool, empty string gets written as NUL character. Is there any way I can bcp out empty string as empty string itself instead of NUL to the file?
View 3 Replies View RelatedConstraint For An Empty String
Jul 27, 2007How do I prevent a column having empty strings entered into it. I want to allow
nulls but not allow empty strings.
Paul
Order By String Not Empty?
Jul 20, 2005Hi ng.I have a varchar field in my table, called Name.I wanna do a selection, which is ordered by whether this field is empty ornot.E.g. something like:SELECTUserIDORDER BYName <> '';- - -How can I accomplish this?TIA.Klaus.
View 4 Replies View RelatedHow To Cast Empty String
Mar 22, 2006I want to replace a column value with a null if the string is empty. I would have thought this simple expression would do it:
RTRIM([FromContractSymbol]) == "" ? NULL(DT_STR, 0, 1252) : (DT_STR, 6, 1252)FromContractSymbol
Yet, I get the following error:
For operands of the conditional operator, the data type DT_STR is supported only for input columns and cast operators. The expression "...see above..." has a DT_STR operand that is not an input column or the result of a cast, and cannot be used with the conditional operation.
The expression works if I replace the NULL(DT_STR, 0, 1252) with say "A" and the expression works on other non-string columns. (As in "NULL(DT_I1) : (DT_I1)100")
Checking If String Is NULL Or EMPTY In SQL
Nov 9, 2007I need to check in my Stored procedure if the information passed is null or empty so I can decided to insert the new value or keep the old. How do I accomplish this please in T-SQL. Thanks in advance.
View 6 Replies View RelatedInsert Empty String Or Null To Sql Db
Jan 12, 2008Hi:
Trying to insert null value into sql table, but not working, if I use:
if (strMyText.Length == 0) command.Parameters.Add("@Text", DBNull.Value); // or using:("@Text", null), or using:("@Text", DBNull) else command.Parameters.AddWithValue("@Text", strMyText);
When I go back to table, I see the value is: 'NULL', has single quotation mark, suppose to be: NULL
Where is the problem?
Thanks a lot.
Jt
Null Or Empty String Use More Space?
Aug 9, 2005Hi all, I have some columns in my database which allows null. I want to know if leaving the field to be NULL or storing an empty string into the field, which will take up more space?? if the field type is varchar(100)
View 5 Replies View RelatedHELP : Empty String To Null Conversion By SQL
Nov 10, 2005Hi folks,
I've have about 100 tables, for some reasons, column values that are originally NULL was inserted as emtpy string. So, I am wondering if I can write JUST ONE SQL (hopefully don't have to specify the field names in the SQL as well) for each table so that all the empty strings will be converted back to NULL.
THANKS JOHN
Referential Integrity With Empty String And ZERO
Jul 7, 2007Hi,
How could I define referential integrity using FK constraint which allow me to have empty string/ZERO number instead of NULL value ?
Thank you
How To Use /Set Option To Set A Variable To Empty String
May 19, 2008
Hi,
I developed an SSIS package and I'm using the dtexec utility to run it. The package has a variable RunDate (datetime) and i want to set this value to "" (empty string) when i try to run this package using the dtexec.
Currently I'm getting an error Argument option not valid.
Thanks in advance
NULL Values Vs Empty String Vs Space
Oct 25, 2006How do I define a field to have the default value = ''. Not NULL but not a space either in SQL Server 2005?
View 10 Replies View RelatedSQL 2012 :: Blank (Empty String) In Primary Key
Apr 29, 2014Can we have blank value in Primary key field? Two fields are chosen as Primary Key for this table but the issue is at any given time one value will be blank when other is populated. Does sql server still order the records based on these keys? (Clustered index). Or should I just go about adding ID (identity)?
View 1 Replies View RelatedBcp Is Inserting Blank Space For Empty String
Jul 23, 2005I'm doing a bcp out of a table to a file. Some of the fields in arecord may have an empty string.When I bcp out to the file and examine it, the fields that have anempty string in the database now show up in the file as having oneblank character.Why is bcp doing this? I don't want the blank character in my output.Thanks,Eric
View 4 Replies View RelatedWhy CodeBase Property Of CurrentAssembly In CLR SP Is Empty String?
Jan 15, 2007Where is SQL storing and caching the assemblies used by CLR SP?
I want to read a mapped configuration file for that assembly but it seems that assemblies are not read form their initial location.
Is there a way to use configuration files for the assemblies used by CLR SPs? (I don't want to use a static string to point to a file on the disk)
Empty String Problem In Joined Data
Feb 13, 2008Hello,
I have a problem where I need to include data from a table where one of the joined columns can contain empty strings. The emptry string column and its related columns need to be included in the results of the query.
The Join looks like this:
SalesData.dbo.tbl_CYProcessedSales ps
INNER JOIN SalesData.dbo.vw_Product_CYProcessedSalesXref xr
ON ps.Prod = xr.Prod
AND ps.Acct = xr.AcctCode
INNER JOIN TxnRptg.dbo.vw_NetNewRevenueUnion nn
ON xr.BillingType = nn.BillingType
AND xr.ProdGroup = nn.Product
AND xr.AcctCode = nn.AcctCode
The problem occurs on the xr.BillingType = nn.BillingType portion of the join. the nn.BillingType can contain empty strings. I've tried a LEFT join to vw_NetNewRevenueUnion, but this has not worked.
In vw_NetNewRevenueUnion, BillingType becomes an empty string within a CASE statement if BillingType is NULL. I've thought about using something like 'All' in the ELSE condition, and doing the same in the vw_Product_CYProcessedSales view just so I don't have to deal with an empty string.
If I were not to do that, is there some way I can handle the empty string issue within the join so that empty string records will be included in the query results?
Thank you for your help!
cdun2
Select Returning Nbsp Instead Of An Empty String
May 15, 2008
I am using a SQLDataSource with the following Select query. If the "spouse" values are not in the database, I get the HTML non-breaking-space character back, rather than an empty string.
SelectCommand="select applicant_id, (applicant_last_name + ', ' + applicant_first_name) as applicant_name, CONVERT(varchar(10), applicant_dob, 101) as applicant_dob, applicant_ssn, (spouse_last + ', ' + spouse_first) as spouse_name, CONVERT(varchar(10), spouse_dob, 101) as spouse_dob, spouse_ssn from applicant where applicant_last_name like '%'+@last_name+'%' order by applicant_last_name"
Here is the relevant code-behind:
TextBox tb = (TextBox)formView.FindControl("SpouseName");
tb.Text = e.Item.Cells[4].Text;
DatePicker dp = (DatePicker)formView.FindControl("SpouseDateOfBirth");
if (e.Item.Cells[5].Text.Length > 0)
{
try // this is a try/catch because nbsp is not parsed as a date
{
dp.DateValue = DateTime.Parse(e.Item.Cells[5].Text);
}
catch
{
dp.txtDate.Text = "";
}
}
tb = (TextBox)formView.FindControl("SpouseSocialSecurityNumber");
tb.Text = e.Item.Cells.Text;
Thoughts?
Todd
Detect And Convert An Empty String (from Textbox) To Null?
Jun 9, 2007Hi all,I have this code that I use for my Search function:SELECT DISTINCT [MUSIC_TITLE], [MUSIC_ORIGINAL_SINGER], [MUSIC_PERFORMER]FROM t_musicWHERE (@MUSIC_TITLE IS NULL OR [MUSIC_TITLE] LIKE '%' + @MUSIC_TITLE + '%') AND (@MUSIC_ARTIST IS NULL OR ([MUSIC_ORIGINAL_SINGER] LIKE '%' + @MUSIC_ARTIST + '%' OR [MUSIC_PERFORMER] LIKE '%' + @MUSIC_ARTIST + '%')) But right now if I don't enter anything in one of the textbox (2 have two, either of them can be left empty), the above Sql statement doesn't return anything since ADO.NET can't tell an empty textbox and treat it at null... So anyone please help me how to detect an empty textbox and set that to null for the above SQL statement to work. (It work in SQL Manager Studio, when I set one of the parameter = null.) I'm very new to ASP.NET stuffs, so if someone can help me to convert that function to code-behind and help me to call it from the .aspx, that would be even better as I don't want to put the code in my .aspx page... But I'm not quite there yet. Thank you all,Kenny.
View 19 Replies View RelatedConverting Empty String To Null When Inserting/updating
Mar 10, 2006I am using the following query to calculate date differences:select ..........DATEDIFF(d, recruitment_advertising.advertising_date, career_details.RTS_Email AS Datetime) AS Ad_to_RTS_days FROM .....I have stored all my dates as NVARCHAR because of the issues with localization.If the value is an empty String my output is eg: -38700. which is way off and incorrect. Some of the values in my table are NULL and they produce the correct result.Is there a T-SQL statement to replace empy Strings with the NULL value in my tables.I'd like to use it as a trigger when inserting or updating to convert empty strings to NULLbefore the values are inserted.Thanks guys.
View 1 Replies View RelatedOracle Empty String == NULL Behavior In SQLServer 2k5?
Feb 15, 2007I'd like to have Oracle's empty string behavior in SQLServer 2k5. Oracle treats an empty string as NULL's.
In PL/SQL can do:
SELECT * FROM TABLE WHERE TABLE.FIELD IS NULL
... and it'd return rows containing NULL's as well as empty strings.
Can this be done? I couldn't find a setting for it.
Thanx
Peter
Lookup Transform Still Cannot Find Empty String Matches
Nov 24, 2007Has anyone find solution for this problem.
i also checked
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=298056&SiteID=1 and
http://blogs.conchango.com/kristianwedberg/archive/2006/02/22/2955.aspx
Suppose have a Dimension table
DimColor
----------------------------
ColorKeyPK(smallint) ColorAlternateKey(nvarchar(30))
-1 UnknownMember
1
2 Blue
3 Red
4 Black
Color with the ID 1 is empty string
FactOrders
---------------------------
OrderID Date Color Quantity
OrderID = 1 Color = 'Black' Quantity = 10
OrderID = 2 Color = 'Red' Quantity = 20
OrderID = 3 Color = '' Quantity = 10
OrderID = 4 Color = 'Blue' Quantity = 5
OrderID = 5 Color = Black Quantity = 10
When i use the Lookup transform it cannot find the ColorKeyPK
The result of the Lookup transform is.
------------------------------
OrderID = 1 Color='Black' ColorKey=4
OrderID = 2 Color='Black' ColorKey=3
OrderID = 3 Color='Black' ColorKey=NULL ----> This is the problem Lookup cannot find empty string. It should be 1.
OrderID = 4 Color='Black' ColorKey=2
OrderID = 5 Color='Black' ColorKey=4
Thanks from now.
Empty String Equals To Blank: How To Change This Behaviour?
Feb 11, 2008This seems to be a rather old problem (http://www.themssforum.com/SQLServer/Does-empty/) but I couldn't find an answer yet.
The problem is: I have two tables t1 and t2 where t1 is a staging area of t2.
t1: (id int not null, phone varchar(30))
t2: (id int not null, phone varchar(30))
Data in t1: (1, '') <- empty string
Data in t2: (1, ' ') <- a blank
Comparing t1.phone with t2.phone results in equality which in my opinion isn't correct.
The question ist: How can I change the behaviour of SQL-Server to result in inequality so that the change in my staging table is detected correctly?
Thanks in advance
Fridtjof
Why Search On Empty String Returns Results With A Space?
Aug 1, 2007In sql server 2000 - our QA pointed out that his testing for empty strings returned 200 + rows but that when he clicked in the field there were obviously a space there. This issue came up because of the script I created to replace and earlier one that queried on empty strings instead of datalength and the earlier script always reported that it had updated x number of rows regardless of how many times it was run on the same database.
QA query based on the earlier script:
Select * from StringTable
WHERE (LongString = '' OR LongString IS NULL)
My script:
The fields are nvarchars in the newer database but older version of the database had varchars. I had created a script to replace empty strings as follows:
-- if LongString column is varchar - run varchar update else nvarchar update
If exists (Select * from sysobjects o
inner join syscolumns c on c.id = o.id
where c.name = 'LongString' and o.name = 'StringTable' and c.xtype = 167) begin
-- update varchar LongString
UPDATE StringTable
SET LongString = char(32)
-- Select * from StringTable
WHERE ((DATALENGTH(LongString ) < 1) OR LongString IS NULL)
END
Else Begin
-- update nvarchar LongString
UPDATE StringTable
SET LongString = char(32)
-- Select * from StringTable
WHERE ((DATALENGTH(LongString ) < 2) OR LongString IS NULL)
END
If exists (Select * from sysobjects o
inner join syscolumns c on c.id = o.id
where c.name = 'ShortString' and o.name = 'StringTable' and c.xtype = 167) begin
UPDATE StringTable
SET ShortString= char(32)
-- Select * from StringTable
WHERE ((DATALENGTH(ShortString) < 1) OR ShortString IS NULL)
END
Else Begin
-- update nvarchar ShortString
UPDATE StringTable
SET ShortString= char(32)
-- Select * from StringTable
WHERE ((DATALENGTH(ShortString) < 2) OR ShortString IS NULL)
END
My method for checking for datalength appears to work correctly why doesn't the QA script? I thought it might have to do with the nvarchar used in the table but I changed the column to a varchar and still has the same issue.
Thanks
Anyway To Check If A Text Field Is Blank (not Null But Just A Empty String '') ?
Oct 27, 2004i have a trigger on a table right now... when fields are inserted, theres a text field inserted and i want to check if that text field = '' (the empty string, not NULL) and if it doesn't equal that, then perform some row updates on other tables, but if it is empty, to not do anything else in the trigger... right now i have this:
Code:
IF ((SELECT Note FROM XATPoDetail WHERE ReqNbr = (SELECT ReqNbr FROM Inserted)) LIKE(''))
Note is the text field, XATPoDetail is the table where its being inserted into. I had to do the select FROM the table because it wouldn't let me select a text data type from the "Inserted" virtual table
but it tells me me "Error 279: The text, ntext, and image data types are invalid in this subquery or aggregate expression"
thanks
Anyway To Check If A Text Field Is Blank (not Null But Just A Empty String '') ?
Oct 27, 2004i have a trigger on a table right now... when fields are inserted, theres a text field inserted and i want to check if that text field = '' (the empty string, not NULL) and if it doesn't equal that, then perform some row updates on other tables, but if it is empty, to not do anything else in the trigger... right now i have this:
IF ((SELECT Note FROM XATPoDetail WHERE ReqNbr = (SELECT ReqNbr FROM Inserted)) LIKE(''))
Note is the text field, XATPoDetail is the table where its being inserted into. I had to do the select FROM the table because it wouldn't let me select a text data type from the "Inserted" virtual table
but it tells me me "Error 279: The text, ntext, and image data types are invalid in this subquery or aggregate expression"
thanks