Sorting Out Blanks And Nulls
Dec 6, 2004
Hi,
I'm trying to create a view from a table in which I want to concatenate to columns to a new column. The concatenation part works fine when data "supports" calculations, i.e. no nulls. The data however is "infected" in two ways I have Null-values and I have blanks alongside with some real information. I concatenate via a CASE statement but I can't figure out how to take the 3 situations into account (nulls, blanks and data) and create one meaningfull column in my view.
The result should be
column1 + "-" if column2 is null or blank
column1 + "-" + column2 if column2 has meaningfull data
Both the involved columns are text (varchar).
If anyone has been in this situation before could you please provide som code that handles the situation.
Regards
Kim Hansen
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Jul 26, 2006
I wrote a simple data flow with an OLE DB source and destination. I do a direct mapping of the columns ( colA - > colA) with no transformations needed. I found that colA on the destinatin does not allow NULLS (required by the program that accesses that database) while colA on the source supports and has NULLs, Is there any accomodaiton for handling NULLS (like mapping them to blanks) in the direct copy approach or do I need to read each row and test colA_ISNull?
TIA,
barkingdog
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Feb 27, 2008
I have an Excel spreadsheet with a field that may contain blanks (empty). When I filter on that field to show only the blanks, I get 4000 records returned. But if I import the spreadsheet into SQL Server, the test in there for blanks ('') returns nothing. However, if I test for Nulls in that field, I get 5000 records returned. I don't know which one (Excel or SQL Server) is giving me the right answer. Can anyone help me understand what's going on?
Thanks!
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Oct 19, 2007
Hi,
With DTS, the default behavior is to import blanks ("") in a data file as nulls in the table.
However, in SSIS, the default behavior is to import blanks as blanks.
I need to ensure that the packages I'm migrating import the data in the exact same way. I am wondering what is the easiest way to convert blanks to nulls?
Right now I'm using a script to convert the blanks to nulls before they are written to the table, but just wondering if there's an easier way.
Thanks
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Jul 3, 2007
I'm working on a new project using SSIS in SQL Server 2005 and have an issue that I need resolved.
I'm loading an XML file into SSIS using the XML Source Adapter. This maps to an OLE DB destination which reads the data into a SQL table (please see below for the table structure). In between this stage is a data conversion to convert the Unicode characters from XML into non-Unicode characters.
CREATE TABLE [dbo].[XMLTest](
[Forename] [varchar](50) COLLATE Latin1_General_CI_AS NULL,
[Surname] [varchar](50) COLLATE Latin1_General_CI_AS NULL,
[PostCode] [varchar](50) COLLATE Latin1_General_CI_AS NOT NULL
)
The problem I have is with blank strings in xml are being inserted into the SQL table as NULL values and not blanks (see the xml below).
<Root>
<People>
<Forename>Duncan3</Forename>
<Surname></Surname>
<PostCode>ME16 0WH</PostCode>
</People>
</Root>
Correct me if I'm wrong but a null value in xml means the node does not exist (See the xml below)?
<Root>
<People>
<Forename>Duncan3</Forename>
<PostCode>ME16 0WH</PostCode>
</People>
</Root>
Please also find the schema attached for reference.
<?xml version="1.0"?>
<xschema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="Root">
<xs:complexType>
<xsequence>
<xs:element minOccurs="0" name="People">
<xs:complexType>
<xsequence>
<xs:element minOccurs="1" name="Forename" type="xstring" />
<xs:element minOccurs="0" name="Surname" type="xstring" />
<xs:element minOccurs="1" name="PostCode" type="xstring" />
</xsequence>
</xs:complexType>
</xs:element>
</xsequence>
</xs:complexType>
</xs:element>
</xschema>
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Dec 29, 2004
Hi,
I'm not sure why this is happening, but I'm trying to sort/order on this special field/column that I have created to allow precise ordering. However, for all of the values that are returned, if there are any NULLS, they are returned first/ahead of the values of what I want to be returned first. This field/column I created is called 'POW' (stands for Priority on Web). The values are just integers, 1-whatever, and we try to make sure that they're all unique. So for example, if we have a 1 in that field, then that row should be returned first, and if another row has 2, then it should be next. However, this is not working exactly - all of the NULL values are returned FIRST, then the proper values in the correct order. I want the NULLS to be last, because it may take some time for someone to go into each record, and assign it a unique value. My current SQL statement reads:
mySQL = "SELECT SignTypes.Id, SignTypes.SignType, SignTypes.SignDescription, SignTypes.FinalSignWidth, SignTypes.FinalSignHeight FROM SignTypes JOIN PropLocSigns ON SignTypes.Id = PropLocSigns.SignTypeID WHERE PropLocSigns.PropLocID = " & Session("PropID") & " AND (RestrictOnWeb = 0 OR RestrictOnWeb IS NULL) ORDER BY SignTypes.POW; SELECT @@ROWCOUNT"
So if someone knows of a way to put NULLS last, and still have my proper ordering, that would be great! I would think that there's some simple way of doing this, but not being an expert, I don't know. Thanks for the help!
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May 16, 2006
When i do a select on my emplee table for rows with null idCompany i dont get any records
I then try to modify the table to not allow a null idCompany and i get this error message:
'Employee (aMgmt)' table
- Unable to modify table.
Cannot insert the value NULL into column 'idCompany', table 'D2.aMgmt.Tmp_Employee'; column does not allow nulls. INSERT fails.
The statement has been terminated.
This sux
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Feb 11, 2007
I have a report where I am giving the users a parameter so that they can select which field they would like to sort on.The report is also grouping by that field. I have a gruping section, where i have added code to group on the field I want based on this parameter, however I also would like to changing the sorting order but I checked around and I did not find any info.
So here is my example. I am showing sales order info.The user can sort and group by SalesPerson or Customer. Right now, I have code on my dataset to sort by SalesPerson Code and Order No.So far the grouping workds, however the sorting does not.
Any suggestions would help.
Thanks
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Jul 10, 2015
SSRS 2012 - VS2010...The report compares two years with a sort order on a value that has been engineered based on text switched to int. When sorting A-Z this is the result in the horizontal axis is: 5th, K, 1st, 2nd, 3rd, 4th, 5th..When sorting Z-A the result in the horizontal axis is:5th, 4th, 3rd, 2nd, 1st, PreK..Z-A is correct but A-Z sorting shows 5th as the start and end. The magnitude of the PreK location is correct but the label is wrong on the A-Z sort order. The sorting is implemented using the Category Group sorting option.
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Feb 17, 2008
is there an elegant way to use one equals sign in a where clause that returns true when both arguments are null, and returns true when neither is null but both are equal and returns false when only one is null?
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May 15, 2008
I have two SSIS packages that import from the same flat file into the same SQL 2005 table. I have one flat file connection (to a comma delimited file) and one OLE DB connection (to a SQL 2005 Database). Both packages use these same two Connection Managers. The SQL table allows NULL values for all fields. The flat file has "empty values" (i.e., ,"", ) for certain columns.
The first package uses the Data Flow Task with the "Keep nulls" property of the OLE DB Destination Editor unchecked. The columns in the source and destination are identically named thus the mapping is automatically assigned and is mapped based on ordinal position (which is equivalent to the mapping using Bulk Insert). When this task is executed no null values are inserted into the SQL table for the "empty values" from the flat file. Empty string values are inserted instead of NULL.
The second package uses the Bulk Insert Task with the "KeepNulls" property for the task (shown in the Properties pane when the task in selected in the Control Flow window) set to "False". When the task is executed NULL values are inserted into the SQL table for the "empty values" from the flat file.
So using the Data Flow Task " " (i.e., blank) is inserted. Using the Bulk Insert Task NULL is inserted (i.e., nothing is inserted, the field is skipped, the value for the record is omitted).
I want to have the exact same behavior on my data in the Bulk Insert Task as I do with the Data Flow Task.
Using the Bulk Insert Task, what must I do to have the Empty String values inserted into the SQL table where there is an "empty value" in the flat file? Why & how does this occur automatically in the Data Flow Task?
From a SQL Profile Trace comparison of the two methods I do not see where the syntax of the insert command nor the statements for the preceeding captured steps has dictated this change in the behavior of the inserted "" value for the recordset. Please help me understand what is going on here and how to accomplish this using the Bulk Insert Task.
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Aug 31, 2005
Nevil Mascarenhas writes "Hi SQL team,
I am just a beginer in SQL
Here is sample output of a SQL query
Alarm No Site Name Startdate Starttime
7767 ABC 20-08-05 00:00
7765 XYZ 20-08-05 00:00
7762 ASD
5453 QWE 22-08-05 01:00
In this above example, I would like to replace blank fields in Startdate and Starttime coloumn with XXX
Output required is
Alarm No Site Name Startdate Starttime
7767 ABC 20-08-05 00:00
7765 XYZ 20-08-05 00:00
7762 ASD XXX XXX
5453 QWE 22-08-05 01:00
Can you please guide me."
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Jan 18, 2006
Quick Question I hope.
Does having a lot of blanks in a column cause errors ?
In 2 or 3 packages where I get 95% of the data in the Error Colomn I can find nothing wrong with the data at all ? it all either seems perfect or there is no data in the column in question usually I would have maybe 800 rows where data would have been inserted but in the other 40, 000 rows the column is blank
Using the "Retain null values from the source as null values in the destination" doesnt seem to make a differance.
This is the error description
The data value cannot be converted for reasons other than sign mismatch or data overflow.
Anyone know of a solution / reason why this keeps happening
Thanks
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Mar 5, 2004
I posted this scenario earlier and ndinakar said my code worked on (I guess) his own machine but has not worked on mine! Does that not sound funny? I need to ge through with this simple but frustrating stuff in time. I've implemented more complex snippets before this but I just can't figure the problem out.
Can anyone out there tell me what I could be doing wrongly? I wrote a simple stored procedure called 'proc_insert_webuser' in a database that has been moved to a remote server called LAGOS-NTS3. I executed it from SQL Query Analyser and it worked. When, however, I executed the same stored procedure from ASP.Net it gives an impression that a new record has been inserted and even displays the newly generated ID column to me. On checking the base table I found only blank columns with only the ID column having the generated IDs!
I'm perplexed. I checked the code and can't possibly spot the error. Can anyone help. Found below are snippets used.
CREATE PROCEDURE proc_insert_webuser
(
@applicantidnumeric(18) output,
@firstnamevarchar(18),
@midname varchar(18),
@lastname varchar(50),
@secretcodevarchar(18),
@my_errnumeric(18) output
)
AS
IF (SELECT COUNT(ApplicantID) FROM tbl_webuser WHERE Firstname = @firstname AND Midname = @midname AND Lastname = @lastname) = 0
BEGIN
begin transaction
INSERT INTO tbl_webuser (Firstname, Midname, Lastname, SecretCode)
VALUES (@Firstname, @Midname, @Lastname, @SecretCode)
commit transaction
SET @applicantid = @@IDENTITY
END
ELSE
BEGIN
RAISERROR('Error! Execution aborted. A matching user profile exist.', 16, 1)
SELECT @my_err = @@ERROR
END
RETURN
Then the ASP.Net stuff:
Sub PostData()
'connection string production
Dim cstring As String = "User ID = sa; Password = ; database = E-Recruitment; Server = LAGOS-NTS3; Connect Timeout = 60"
'connection instantiation
Dim cnx As SqlConnection = New SqlConnection(cstring)
Try
'open connection
cnx.Open()
'instantiates and execute a command object
Dim cmd As SqlCommand = New SqlCommand
With cmd
.Connection = cnx
.CommandText = "proc_insert_webuser"
.CommandType = CommandType.StoredProcedure
Dim param1 As New SqlClient.SqlParameter("@applicantid", 0)
param1.DbType = DbType.Single
param1.Direction = ParameterDirection.Output
.Parameters.Add(param1)
Dim param2 As New SqlClient.SqlParameter("@firstname", txtFirstNM.Text)
param2.DbType = DbType.String
param2.Direction = ParameterDirection.Input
.Parameters.Add(param2)
Dim param3 As New SqlClient.SqlParameter("@midname", txtMidNM.Text)
param3.DbType = DbType.String
param3.Direction = ParameterDirection.Input
.Parameters.Add(param3)
Dim param4 As New SqlClient.SqlParameter("@lastname", txtLastNM.Text)
param4.DbType = DbType.String
param4.Direction = ParameterDirection.Input
.Parameters.Add(param4)
Dim param5 As New SqlClient.SqlParameter("@secretcode", txtPWD.Text)
param5.DbType = DbType.String
param5.Direction = ParameterDirection.Input
.Parameters.Add(param5)
Dim param6 As New SqlClient.SqlParameter("@my_err", 0)
param6.DbType = DbType.Single
param6.Direction = ParameterDirection.Output
.Parameters.Add(param6)
.ExecuteNonQuery()
'pick the auto-number
Dim strAppID = .Parameters("@applicantid").Value
'notifies the user of record success
lblMessage.Text = "Profile created. Your ApplicantID is : " & strAppID & " Kindly take note of your UserID. You'll need it for future logins."
End With
Catch ex As Exception
'notifies the user of any error(s)
lblMessage.Text = Err.Description & " originating from " & Err.Source
Finally
cnx.Close()
End Try
End Sub
==================
I'm calling this procedure from the click event of a command button. What could be happening to the code? I have done similar things and got positive results! Any hint from anyone out there?
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Mar 10, 2000
A table was created in version 6.5 that has 2 blank spaces and a slash '/' in it's name (i.e. Item Type w/Groups). This was done in error and now the table cannot be dropped or renamed and dropped.
Does anyone know how I can delete this table? Please let me know.
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Mar 11, 2008
Hello,
In my .NET.ASP application I generate a random five digit password, like so:
string password = Membership.GeneratePassword(5, 1);
The result could be a password like "0l$IE" and I the save this password to an SQL server. The problem is however that with the generated password five blanks are also added. Instead of "0l$IE" I get "0l$IE ". I hope you understand what I mean? Is there an easy way to correct this?
I appreciate any help!
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Mar 9, 2006
When I enter a data in a table, SQL Server automatically completes the data with blanks up to length of column.
this happens in a web form also in Management Studiıo,
Whan am I doing wrong ?
does Collation have anything with it ?
SQL Server 2005 / Developer Edition
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May 1, 2014
I am try to see if there are any blanks in a node of a table that has xml data in one of the columns. The query I use is returning zero results.
Select COUNT(*)from ENTITY
Where CONVERT(XML, Ent_root_xml, 0 ).value('(//UD_PQ_FLAG/node())[1]', 'VARCHAR(50)')= ''
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Apr 3, 2008
I have a comma delimited data file TestData.txt of the form:
123,asss,aweqrrr ,ssdsff , ,2wwwrwrr
434,sff,dgfdgd ,sffsfsfete ,sd ,dff
I want to load this data into SQL Server tables so that the data will be imported without the trailing spaces(blanks) after each data element .
Thus I will like to trim the data of the extra spaces (blanks) before import.
Desired data to be loaded :
123,asss,aweqrrr,ssdsff,,2wwwrwrr
434,sff,dgfdgd,sffsfsfete,sd,dff
Any help will be most welcomed
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Aug 15, 2013
Aim- the following columns “Cancel_Date”, “First_Post_Date”,“Last_Post_Date” can either be populated with figures or have a null value.
I want all Null values to be removed and be replaced with a blank
Final table is
Select *
from #test
left join #SF_AccountBuild on #test.FDMSAccountNo = #SF_AccountBuild.[External FDMSaccountno]
Results
[FDMSAccountNo],
External_ID ,
Parentsfid,
[DBA Name],
[Legal Name],
Street,
[MM3-DBA-ADDR2],
[Code] .....
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Jan 8, 2015
I am looking for a query which will populate one of my columns that contains some blanks with a defined value based on a value in another column
For example in the below table I would like the blanks in serial number to be populated with "SN09"
Product_NameSerial_Number
PRODUCT1
PRODUCT1
PRODUCT2SN10
PRODUCT3SN11
PRODUCT3SN11
PRODUCT1
So the query I am looking for would basically add some values to the results where they meet the right criteria.
I am running the query through a view so I dont actually want to add the values to the physical tables only to the view of the results if you understand what I mean?
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Jul 20, 2005
I use Blanks in ColumnNames ( I know that this isnt very good, but alot of code and querys had to be changed if I would remove all blanksin all columnnames).When I link this tables with ODBC in my ACC97 - project, some of thetables causes an ODBC-Error.Are there possibilities to workaround this error?Thanks, Andreas Lauffer, easySoft. GmbH, Germany
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Feb 5, 2008
Hi,
I've an int field and when this field has a null, I want to show empty/blanks instead of 0. How can this be achieved?
I've tried the below:
declare @a as int
set @a= null
select isnull(@a,'')
o/p: 0
select cast(isnull(@a,'') as varchar)
o/p: 0
select case convert(varchar,@a)
when null then ''
else @a
end
o/p: null
Thanks for your help!
Subha
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Jul 27, 2006
Hi,
I am having a curious problem with parameter passing between
reports. I have 2 reports the first report gives employee name, Department and
in the second report I have employee details. If the user clicks on the
Employee name in the First report it should go to the second report and display
the details. My problem comes if suppose the employee name is Don King? when the parameter gets passed it does not recognize
the space between the name and throws
an error saying King not recognized.
Would appreciate if anybody could suggest as to how I can
pass the name with spaces in the report parameters.
Thanks and regards
PMNJ
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May 14, 2008
I have a report that has DateTime parameters e.g. StartDate and EndDate. When I create these report parameters the "Allow Blank" option is disabled but checked. When I run the report and do not enter anything in these fields it pops a message asking me to enter the Date. How do I use the "Allow Blank" option for date parameters on my report?
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Apr 3, 2006
Hi,
This might sound obvious, or a newbie question, but how are trailing blanks treated by SQL2005 on varchar columns?
I have a column where two rows only differ by a trailing blank. If write a select and a where clause on the column, anly trailing blanks seem to be trimmed. I tried the ansi padding setting but it doesn't change anything. Is it a question of collation? I have default collation on the server set to SQL_Latin1_General_CP1_CI_AS...
The problem also seems to arise when I try to create a unique index on the column, where both values are considered equivalent...
I give here a sample based on the BOL for set ansi_padding. I was expecting each of the select statements below to retrun only one row...
Cany somebody please explain why they all return two rows?
PRINT 'Testing with ANSI_PADDING ON'
SET ANSI_PADDING ON;
GO
CREATE TABLE t1 (
charcol CHAR(16) NULL,
varcharcol VARCHAR(16) NULL,
varbinarycol VARBINARY(8)
);
GO
INSERT INTO t1 VALUES ('No blanks', 'No blanks', 0x00ee);
INSERT INTO t1 VALUES ('Trailing blank ', 'Trailing blank ', 0x00ee00);
INSERT INTO t1 VALUES ('Trailing blank ', 'Trailing blank', 0x00ee00);
SELECT 'CHAR' = '>' + charcol + '<', 'VARCHAR'='>' + varcharcol + '<',
varbinarycol
FROM t1
where varcharcol='Trailing blank';
GO
SELECT 'CHAR' = '>' + charcol + '<', 'VARCHAR'='>' + varcharcol + '<',
varbinarycol
FROM t1
where varcharcol='Trailing blank ';
GO
PRINT 'Testing with ANSI_PADDING OFF';
SET ANSI_PADDING OFF;
GO
CREATE TABLE t2 (
charcol CHAR(16) NULL,
varcharcol VARCHAR(16) NULL,
varbinarycol VARBINARY(8)
);
GO
INSERT INTO t2 VALUES ('No blanks', 'No blanks', 0x00ee);
INSERT INTO t2 VALUES ('Trailing blank ', 'Trailing blank ', 0x00ee00);
INSERT INTO t2 VALUES ('Trailing blank ', 'Trailing blank', 0x00ee00);
SELECT 'CHAR' = '>' + charcol + '<', 'VARCHAR'='>' + varcharcol + '<',
varbinarycol
FROM t2
where varcharcol='Trailing blank';
GO
SELECT 'CHAR' = '>' + charcol + '<', 'VARCHAR'='>' + varcharcol + '<',
varbinarycol
FROM t2
where varcharcol='Trailing blank ';
GO
DROP TABLE t1
DROP TABLE t2
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May 8, 2015
I have a small question here is below how my data look
K_ID ColA ColB
ColC ColD
1 X12134 ABCD
' ' 1/1/2015
2 X12134 ABCD
' ' 2/1/2015
3 X12134 ABCD
DE02635 3/1/2015
I want the output like this
K_ID ColA ColB
ColC ColD
1 X12134 ABCD
DE02635 1/1/2015
2 X12134 ABCD
DE02635 2/1/2015
3 X12134 ABCD
DE02635 3/1/2015
I tried using Over by, Lag functions.. But some where i am missing the logic in achieving the Output...
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Jun 26, 2006
Hiho,
I'm reading out some exelsheets to store the data in a SQL DB on a MS SQL Server.
I can connect to Excel file easily and usual querys are woriking as well.
My Probelm is, that all my Excel files have some columns with a name that has more than one word, e.g. "this is an example".
Is there any possibility to make query's to this columns? ...renaming them would leed in some trouble, i guess.
regards,
ratsche
ps: maybe this is a sql problem and not a asp.net problem.
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Aug 13, 2007
I have a report that I am building that consist of 4 multi-value selections from four different queries. When I choose "Select All" from all the drop downs and click on "View Reports", it blanks out all the selections from one of the drop downs.
Can someone please point me in the right direction on this problem. The report will run sometimes, but most of the time it will not.
Thanks
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Nov 30, 2006
Hi,
Is it possible using derived column transform to change all blank values in a flat file to say a "0"
Basically convert "" to "0"
Thanks for any help,
Slash.
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Sep 16, 2004
Do NULLs take up space on the Database? I mean is room allocated for them?
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Apr 5, 2004
Can someone tell me what to do if several NULLS are showing up within tables. Is there an easy step to locate all NULLS and delete them within the table?
Can someone provide detailed infromation on how to delete NULLS within tables. I'm new o the SQL side so I hope I have explained what it is that I'm looking to do. Our in house programmer said that the NULLS maybe causing a problem with the software communicating with the SQL Server software.
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Apr 12, 2008
I have a page with 100 numeric fields. SQL insert crashes lest there is a number in every field. Any way around this?
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