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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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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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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Oct 22, 2007
Hi,
I have the following problem: I'm connected to flat file source and trying to read data that is later inserted in an MS Access database. Everything wokrs fine instead of one thing - when I have null values in the flat file, I want those NULL values to be inserted in the MS Access db, instead of that what happens is that I actually get the default values for a column type from the flat file and later insert that defalut value. For example if I have a null value in an four-bite-signed-integer column of the flat file, I get 0 as value.
I thouth of solution using a "Derived Column" transformation which can transform the zeros into nulls, but decided to check with you guys if there is a smarter thing to do (for example to edit the flat file source to read the NULLs correctly).
Any advice is appreciated! Many thanks
Ventsy
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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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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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Aug 3, 2005
hi,my structure table in database:Amount float(53) not null default 0when i try to run his script:alter table ABC alter column Amount float(53) nullit can only set the Amount to allow null, but can't set the defaultvalue to empty.anyone know how to set the field to allow null and default set toempty, no value.thanks
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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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Jan 30, 2007
I asked this question below, but the answer was that the conversion will take place automatically, but I can't get that to happen. I have a flat file with an 8 position field that I identify as string (and I also tried date) that is yyyymmdd and it needs to go into the database field that is datetime format. IS there something I am doing wrong with the definition of it, or do I need to add some kind of conversion, and if so, what and how would that be done. I'm a dts Sql2000 expert, but the SSIS thing is driving me crazy. I have a ton of dts' to convert and the migration tool doesn't work because there are a lot of active X scripts in them. thanks for your help. Boston Rose
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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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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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Sep 10, 2015
What is the format for the SQL Server empty string default value?
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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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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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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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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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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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Dec 27, 2007
Here's a really annoying problem. Let's say you have a text file with 2 million rows.Delimiters all look good and rows are previewed well but the file has a missing row at say lin 1234567 - way deep in the file. When SSIS encounters the blank row, an error is raised and processing on the file STOPS! I verified this in by checking the SSIS log and have even developed an error routine to notify me via email when the error occurs (really cool if I do say so myself ). The main problem still remains - how to resume processing from the point of failure in the file? Any help is appreciated. Thanks.
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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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Jan 7, 2008
I have created a Script Component in my Data Flow that basically reads records from an SQL Table and outputs 3 rows for each input row. My problem is that the Script is outputing a blank row at the beginning of the file. I have requested no headers for the delimited file. I know it is the script because my data viewer from the table doesn't show this additional line where the data viewer from my script and the file has the additional blank line.
Any help would be greatly appreciated
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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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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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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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May 21, 2008
Hello everybody
I have one question about deleting blank row on flat file destination from conditional split.
I create an SSIS package to filter data from Flat file source.
On flat file source, it is Ragged right format and header row delimeter in {CR}{LF}
the coulums are devided manulaay using markers.
I use only 2 columns divided and send the source into conditional split task and the conditions are given to filter data,
when the output from conditional split is placed on flat file destination, i notice blank rows on the output. I want to delete the blank rows so the result data can be displayed continuously in rows.
anybody has any idea for this? I know the script task will work but hope to avoid to use script task.
Thank you in advance for all the help.
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Nov 7, 2006
Ok.. 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.
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Oct 8, 2015
In my source table, I have columns FirstName and LastName, both of datatype nvarchar. In my dataflow, I created two new derived columns mapped to these two columns. When pushing data to the source, I noticed that the FirstName column had a value of NULL while LastName was just an empty string (for rows that did not have any value).
My question is, why my source table column FirstName is showing a NULL value when the derived column datatype is string and the source is string? It should just be showing an empty string right?
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Aug 29, 2007
Hi,
What is the difference updating a null value to char/varchar type column
versus empty string to char/varchar type column?Which is the best to do and why?
Could anyone explain about this?
Example:
Table 1 : tCountry - Name varchar(80) nullable
Table 2 :tState - Name char(2) nullable
Table 3 :tCountryDetails - countryid,state (char(2) nullable) - May the country contain state or no state
So,when the state is not present for the country ,i have two options may be - null,''
tCountryDetails.State = '' or tCountryDetails.State = null?
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Oct 18, 2007
I created a SSIS to export to a flat file (from a SQL command : a stored proc).
I don't wan't my SSIS to create an empty file if there is no data.
How can I achieve this ?
Thanks,
Vince
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Jan 4, 2007
I am trying to bcp import a text file into a SQL Server 2000 database.The text file is coming out of a java application where orderinformation is written to the text file. Each record is on it's ownrow, so the last item in each record has a new line character at theend of it to create the next row. This works well in creating the filehowever bcp does not like to import this text file with the extra blankline at the end. If I change the new line character to the beginning ofthe records then there is a blank line at the top of the text file,which bcp also does not like. Does anyone have any suggestions for meto get around this issue?Thanks,
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Jun 17, 2015
I am attempting to get this script provided by Microsoft to work to no avail. Specifically, when I set the variable FFNonDataRows to 1 (in order to accommodate for the header row), the variable is not being set to False as expected. I don't know enough about C# to understand why this script isn't working. How to get this script to work in this manner?
[URL] ....
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Jul 6, 2015
While importing data from Excel source , some column is getting null value even though excel column has value.To Resolve the issue we tried with
HKEY_LOCAL_MACHINESOFTWAREWow6432NodeMicrosoftOffice14.0Access Connectivity EngineEnginesExcel
1.Change the Value of the Row TypeGuessRows from 8 (Default value) to 0 and ImportMixedType = text
• xls
HKEY_LOCAL_MACHINESOFTWAREMicrosoftJet4.0EnginesExcel
1.Change the Value of the Row TypeGuessRows from 8 (Default value) to 0 and ImportMixedType = text
the connection string of the excel
UPPER(REVERSE(SUBSTRING( REVERSE(@[User::VarInputExcelFile]), 1, 5) ) ) == ".XLSX" ? "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + @[User::VarInputExcelFile] + ";Extended Properties="Excel 12.0;HDR=Yes;IMEX=1";":"Provider=Microsoft.Jet.OLEDB.4.0;Data
Source=" + @[User::VarInputExcelFile] + ";Extended Properties="EXCEL 8.0;HDR=Yes;IMEX=1";"
by doing the above setting also , the column is coming as null from excel source even though there is data in excel.
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Oct 23, 2007
Hi All,
I have a particular issue that has been causing me some problems for a while. I have an SSIS package that imports an excel file into my database, and then performs various data manipulation that I won't go into. The problem I am having is at the import end. The excel source file I am working on is provided to me by my client. It is a fixed format and doesn't change, it contains a header row and there are 32 headings. The trouble I am having is that quite often, the last column is empty, i.e. it contains no data. The header is still there, but theres no data underneath. When I try to import this file using my SSIS package it fails, and complains about needing to remove the metadata for this final column from the External Columns list (VS_NEEDSNEWMETADATA). When I try to preview this file in the properties of the Excel Data Source, the last column does not exist. It's as if it's determining that as there is no data in that final column, that it's unnecessary and not part of the data set, even though it has a header.
Now I've done a bit of research, and found cases that a sort of like mine, I know that the excel file has the first 8 records sampled to determine the data format. This problem suggested to use the IMEX=1 extension in the connection string, which didn't help. I also discovered that when using flat files, if you have odd numbers of columns in your comma seperated list there can be problems. But neither of these issues seem to match the issue I'm facing.
Has ANYONE had a similar problem to me, and can anyone offer any kind of assistance regarding what I need to do to import an excel file that may or may not have data in the final column?
Thanks in advance,
Paul
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Jul 18, 2006
I am using a Foreach loop container to go thru all the files downloaded from the ftp site and I am assigning the file name of each file to a variable at the foreach loop level called filename. In the dataflow task inside the foreach loop container, I have a source script component that uses a flat file connection. The connection string of the flat file connection is set to the filename variable declared at the foreach loop level. However the script component has a error System.ArgumentException: Empty pathname is not legal.
Please let me know how to correct this? The connectionString property of the flat file connection is set to the complete filename including the path. Does a script component need to have a flat file name specified in the flat file connection that it is using? I need to have a script source component as the flat file I am reading from is not in any of the standard formats.
The flat file connection manager's connection string property is blanked out the moment I specify an Expression for the connection string. Is this a defect or is it expected behavior.
Any inputs appreciated.
PS: I looked thru Jamie's blog at
http://blogs.conchango.com/jamiethomson/archive/2005/05/30/1489.aspx
when implementing the above package.
Thanks,
Manisha
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