SQL 2012 :: Blank (Empty String) In Primary Key

Apr 29, 2014

Can 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)?

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Bcp Is Inserting Blank Space For Empty String

Jul 23, 2005

I'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

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Empty String Equals To Blank: How To Change This Behaviour?

Feb 11, 2008

This 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

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Anyway To Check If A Text Field Is Blank (not Null But Just A Empty String '') ?

Oct 27, 2004

i 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

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Anyway To Check If A Text Field Is Blank (not Null But Just A Empty String '') ?

Oct 27, 2004

i 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

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Default To NULL Instead Of Blank/empty String During Flat File Import

Aug 15, 2006

Hi,

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

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SQL Server 2012 :: Insert Empty String In A Decimal Field?

Jul 13, 2015

I have a requirement where i have to insert empty string in column whose datatype is decimal.

I have to replace the column value if it is null then insert it as ' '.

Obviously its generate error msg for conversion, is there any workaround for this. I cannot add 0 or other value as this column is used to generate some output value.

IIF(Column1 IS NULL, ' ', Column1))

I used TRY_PARSE but it insert null value if there is conversion error.

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SQL 2012 :: DBCC Shrinkfile Empty File Not Distributing Data Evenly In Primary File Group With Multiple Files

Apr 29, 2014

Why shrinkfile empty file does not redistribute data evenly in the primary file group with multiple files:

Please run the script attached to see what the end result is.

This is what I set up last night on my test machine.

1) Create database [FGTest] size 200MB
2) Create table called TEST on primary
3) Insert 40MB of data into test
4) Create another file group called temp in primary size 200MB
5) Shrinkfile('FGTest',emptyfile) so that all data is transfered from FGTest into temp file group.
6) Add another 2 files called DATA2 and DATA3. Both are 200MB.
7) We now have 3 empty files that I want data distributed evenly on. FGTest, DATA2 & DATA3
8) Shrinkfile('temp',emptyfile) to move all the data from temp over the 3 file groups evenly

I would expect at this stage to have the following:

FGTest = 13MB,
DATA2 = 13MB,
DATA3 = 13MB

(40MB of data over 3 files should be about 13 MBish in each file)

What I actually end up with is this:

FGTest = 20MB
DATA1 = 10MB
DATA2 = 10MB

It looks as though SQL Server is allocating 50% of all data to the original file and then 50% evenly over
the remaining files in PRIMARY.

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Problem With Subtotals Of A Matrix (Blank, Pdf, Empty Column)

Apr 16, 2008

Because i get no answers i will try it again:

Hi,

i have the following problem:
I have a matrix with a right subtotal column and this matrix was in a list (because in the end i will have more than one matrix). The list fits perfectly the matrix in design mode. But if i render the report in the viewer or to pdf, an additional blank area (like a blank copy of the subtotal column) was inserted after the right subtotal column of the matrix and increases the list too. You can see this easy by set the backgroundcolor of a list to a color. Without the subtotal column the list fits perfect after rendering. The problem is that this additional blank "column" creates empty pages in .pdf rendering, if the width of the matrix is near the page width. The same behaviour happens if i put the matrix with subtotal in a rectangle.
I must use a list in the end because the the final report contains some matrixes and a subreport.
So is this a bug?
Someone must have this problem too?

Thanks for any help.

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Return Primary Key Even When Foreign Key Is Empty

Feb 20, 2015

I have a query that returns contacts connected to a client, but the problem is that it's only returning a result when a contact is associated with a client, even if the client does exist in the db. i want it to still return the client if the client exists.

SELECT * FROM clients, addressbook where clients.clientid = addressbook.clientid AND (clients.clientname LIKE '" . strtoupper($_GET['txtfname'])."%')

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Empty String To Null

Jul 11, 2001

example
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

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Bcp Out Empty String Into Csv Files

Jun 19, 2008

I 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?

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Constraint For An Empty String

Jul 27, 2007

How do I prevent a column having empty strings entered into it. I want to allow
nulls but not allow empty strings.

Paul

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Order By String Not Empty?

Jul 20, 2005

Hi 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.

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How To Cast Empty String

Mar 22, 2006

I 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")

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Checking If String Is NULL Or EMPTY In SQL

Nov 9, 2007

I 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.

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Insert Empty String Or Null To Sql Db

Jan 12, 2008

Hi:
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

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Null Or Empty String Use More Space?

Aug 9, 2005

Hi 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)

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HELP : Empty String To Null Conversion By SQL

Nov 10, 2005

Hi 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

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How To Specify An Empty String As A Default Column Value?

Dec 6, 2007

In the Column Properties window's 'Default Value or Binding' property, how do you specify an empty string?

Thanks.

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Referential Integrity With Empty String And ZERO

Jul 7, 2007

Hi,
How could I define referential integrity using FK constraint which allow me to have empty string/ZERO number instead of NULL value ?

Thank you

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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

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NULL Values Vs Empty String Vs Space

Oct 25, 2006

How do I define a field to have the default value = ''. Not NULL but not a space either in SQL Server 2005?

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Default Empty String Value For Varchar Columns

Jun 4, 2008

Hi guys,
Is there a way to declare a default value of empty string '' for a varchar table column?
Thanks,Kevin

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Why CodeBase Property Of CurrentAssembly In CLR SP Is Empty String?

Jan 15, 2007

Where 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)

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Empty String Problem In Joined Data

Feb 13, 2008

Hello,
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

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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

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DB Design :: What Is Default Database Value For Empty String

Sep 10, 2015

What is the format for the SQL Server empty string default value?

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SQL 2012 :: Select Rows With Blank Spaces

Feb 12, 2014

I got two columns DEATHDATE and STATUS

I have to update STATUS Column as INVALID when data in DEATHDATE column as follows

Example of INAVLID DEATH DATE : 1221, 12xt88,12#10, 1, ABC, #@ , etc

Do nothing when the DEATHDATE is VALID like

Examples of Valid/accepatable DEATHDATE: 09122012, 091212 ,******,********, 000000,00000000

How can i achieve this.

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Detect And Convert An Empty String (from Textbox) To Null?

Jun 9, 2007

 Hi 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.  

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Converting Empty String To Null When Inserting/updating

Mar 10, 2006

    I 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.

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Oracle Empty String == NULL Behavior In SQLServer 2k5?

Feb 15, 2007

I'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

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Lookup Transform Still Cannot Find Empty String Matches

Nov 24, 2007

Has 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.

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