Drop Null Columns From A Table
Jan 11, 2005Hello,
Is then any type of statement I could run to drop all the columns of a table that have a NULL value thoughout or must this be done manually?
Thanks,
Bryan
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Using Alter Table To Drop Columns
Nov 5, 2000I am dropping 60 out of 133 columns on a user table, but am finding that the spaceused by the table ( as shown by sysindexes.dpages ) is not being freed up.
I have dropped and recreated all indexes on the table, with no effect on the dpages value, as well as running dbcc updateusage for the table.
Is it not possible to free up the space used by using this method ?
Is recreating and repopulating the table with only the required columns the correct / only way to do this ?
thanks,
manoj
Locking Column (cannot Drop Columns In The Table)
May 27, 2015How can I pervert dropping the column in the table (probably some process doing that and I want to find it) ? I need to be able to modify but not alter / drop column .
View 4 Replies View RelatedQuery To Retrieve The Columns That Are Null In A Table
Oct 31, 2006Hi,
I need help to build a query that shows me how many columns inside a range on columns are null.
Example: quantity1;quantity2;quantity3;quantity4;quantity5; quantity6;quantity7;
Which columns are null?
Thanks in advance
Table With 4 Columns - Count Field Is Null
Jan 22, 2015I have a table with 4 column in below
Total amount = 1000
salemancode1 = space
salemancode2 = Staff-99
salemancode3 = space
salemancode4 = staff-88
How I can write a one query statement to do this, we expect to count how many salemancode is not space and count the number of salesman to over the total amount.
total amount / (no_of_saleman) as commission
the result is 1000/ 2 the commission is $500.
Doing Math Across Table Columns, Dealing With NULL
Oct 20, 2005Christine the Pharmacist writes "Please pardon as I am not horribly advanced with SQL...
Using SQL Server 2000, Windows 2000, Service pack 4
I'm trying to figure out marketshares for "preferred" products. I have a table put together by hospital and month of medication use with the totals of each drug dispensed in columns as well.
(example table below)
Hospital Month Drug A Drug B Drug C Drug D
A 7 5 10 58 73
B 7 NULL 26 98 43
etc.
** Drug C and Drug D are the preferred drugs
I'm getting correct preferred % in all cases except when a value is NULL (result is NULL). I'm using an aggregate (sum), which should ignore NULLs, but it ignores NULLs within a column, and not ignoring across columns. I've tried setting concat_null_yields_null off and I'm still getting NULL (since I'm using the plus sign).
This is my admittedly confused select statement, suspect this is where my problem lies (problems with saying "sum", but using "+" as well?):
select a.Hospital,a.month,convert(float,sum(c.Drug_C+d.Drug_D))/convert(float,sum(a.Drug_A+b.Drug_B+
c.Drug_C+d.Drug_D)) as preferred_share
Thanks for any advice!"
Replacing NULL Value In Multiple Columns In A Table
Dec 18, 2006Hi,I have some tables where I import data in, lots of field have gotten aNULL value which the application can not handle.Now can I replace each NULL value with '' in a columns with:update <tableset [<column>] = '' where [<column>] IS NULLBut because there are lots of columns this is pretty much work, alsothere are multiple tables.Is there an easy way to replace all NULL values in all columns in atable?Thanks in AdvanceBob
View 2 Replies View RelatedHow To Validate Flat File Data Against Not Null Columns Of A Table?
Nov 27, 2007Hi all,
I am facing a problem on validating the data from a flat file while inserting the data into the destination table of sql server 2005 database. In my package, i have to validate the input data whether the values are coming as null or not, before inserting into the destination database. The flat file may not contain data for all NOT NULL columns. I have to find out that row(s) and reject the record. If the rows are coming as Null for the Not Null columns, the OLEDB Destination throws OLEDB exception for the constraint.
To resolve this, i have an script component in data flow, to check whether the input data is coming as null. I have added the output column of boolean type to the script component, it will be assigned to TRUE when there is null for the Not Null column in the script.
And in the follwing conditional split, i am checking the flag for TRUE to reject the record.
Is there any other way to handle this validation?
Regards
Madhav
SQL Server 2014 :: Import Data From Excel To Table - Null Instead Of 0 In Columns
Oct 29, 2013I have a excel sheet with some data and blank columns. I have a ssis package using to import data from excel to sql table. For blank excel columns it is importing as null instead i want to show them as '0'. If data comes in it should update the data.
View 8 Replies View RelatedDrop All Indexes In A Table, How To Drop All For User Tables In Database
Oct 9, 2006Hi,I found this SQL in the news group to drop indexs in a table. I need ascript that will drop all indexes in all user tables of a givendatabase:DECLARE @indexName NVARCHAR(128)DECLARE @dropIndexSql NVARCHAR(4000)DECLARE tableIndexes CURSOR FORSELECT name FROM sysindexesWHERE id = OBJECT_ID(N'F_BI_Registration_Tracking_Summary')AND indid 0AND indid < 255AND INDEXPROPERTY(id, name, 'IsStatistics') = 0OPEN tableIndexesFETCH NEXT FROM tableIndexes INTO @indexNameWHILE @@fetch_status = 0BEGINSET @dropIndexSql = N' DROP INDEXF_BI_Registration_Tracking_Summary.' + @indexNameEXEC sp_executesql @dropIndexSqlFETCH NEXT FROM tableIndexes INTO @indexNameENDCLOSE tableIndexesDEALLOCATE tableIndexesTIARob
View 2 Replies View RelatedDrop Not Null
Jul 20, 2005hii'm using mssql server 2000i want to remove a not null column constraint from the columnanswertext in table answertext.i tried the following lineALTER TABLE AnswerText ALTER COLUMN AnswerText DROP NOT NULL;it didn't work and this error message apeared (sorry about the german)Server: Nachr.-Nr. 156, Schweregrad 15, Status 1, Zeile 6Falsche Syntax in der Nähe des NOT-Schlüsselwortes.is there a way to drop not null column constraint or do i have to savethe data, drop the table and recreate it?i created the table with the following ddl codeCREATE TABLE AnswerText(....,AnswerText VARCHAR(512) NOT NULL....)tanks for your help
View 1 Replies View RelatedAdding Null And Non-null Columns Together ----??
Nov 27, 2000I have two columns A (which allows nulls) and B( which does not allow nulls).
How can I add the contents of columns A and B SO THAT I DO NOT GET A NULL RESULT WHEN A IS NULL.
The result of A+B concatanation will be stored in a column, C.
Appreciate your help
Ziggy
SQL 2012 :: How To Drop Columns From Alter View
Mar 20, 2015I have a VIEW which is dynamically generated through complex dynamic SQL. Unfortunately the dynamic SQL uses "Select * from table" to select the columns because the programmer did that to reduce the amount of code in the dynamic SQL string as the code can't be debugged if it's too long.
Therefore, I have a VIEW with columns in it I don't need, and want to remove them from the view - I need to remove all columns with column names matching the syntax '%1%_2' .
The view is called TEMP_EXPORT_1
I can either use the code below to return a list of columns that I want removed:
select column_name from information_schema.columns
where table_name='TEMP_EXPORT_1' and column_name like '%1%_2'
Or I can use the code below to return the list of columns that I want to keep:
select column_name from information_schema.columns
where table_name='TEMP_EXPORT_1' and column_name not like '%1%_2'
Now how would I go about altering TEMP_EXPORT_1 view so that it no longer has these columns? I know views don't have a drop statement...
Therefore I tried the following but I'm not sure of the syntax:
ALTER VIEW dbo.TEMP_EXPORT_1
AS
SELECT (select column_name from information_schema.columns
where table_name='TEMP_EXPORT_1' and column_name not like '%1%_2')
FROM dbo.TEMP_EXPORT_1
Am I on the right track? how can I ALTER this view to remove these columns? ... I want to keep this separate from the code that generated the view as I want it as an optional procedure that can be run if needed.
Reclaim Disk Space After DROP Columns
Aug 2, 2006Hello,I tried to make what one reply advice to recover the disk space afterDROPed columns but it doesn't work. I did DBCC DBREINDEX to the tablebut nothing changes.Any other solution?Ignacio
View 5 Replies View RelatedDrop Extended Property MS_Description Of ALL Tables And ALL Columns
Sep 11, 2007Hi,
Is there an easy way (a sql script) to drop the "MS_Description" of all tables and all columns in my database?
Regards,
Alejandroo
Is There A Way To Drop All The Columns Called Some_name In All The Tables At The Same Time
May 15, 2008Hi,
In my DB, many of my tables have a column named upsize_ts I have already been told that it is not linked in any way with the data in the DB. The data type of these columns is timestamp and every record in those colum is this : "<Binary>"
Now maybe it's because the whole DB comes from an export from an Access DB, or maybe not. I just had a few questions:
1/ Does anyone know why that column got generated and what it means? (optional)
2/Now the real question: is there any statement allowing me to "mass-drop" all those columns named "upsize_ts" in every table of my DB at the same time? Or at least any way not to do it one drop table at a time?
Thanks.
Default Table Owner Using CREATE TABLE, INSERT, SELECT && DROP TABLE
Nov 21, 2006For reasons that are not relevant (though I explain them below *), Iwant, for all my users whatever privelige level, an SP which createsand inserts into a temporary table and then another SP which reads anddrops the same temporary table.My users are not able to create dbo tables (eg dbo.tblTest), but arepermitted to create tables under their own user (eg MyUser.tblTest). Ihave found that I can achieve my aim by using code like this . . .SET @SQL = 'CREATE TABLE ' + @MyUserName + '.' + 'tblTest(tstIDDATETIME)'EXEC (@SQL)SET @SQL = 'INSERT INTO ' + @MyUserName + '.' + 'tblTest(tstID) VALUES(GETDATE())'EXEC (@SQL)This becomes exceptionally cumbersome for the complex INSERT & SELECTcode. I'm looking for a simpler way.Simplified down, I am looking for something like this . . .CREATE PROCEDURE dbo.TestInsert ASCREATE TABLE tblTest(tstID DATETIME)INSERT INTO tblTest(tstID) VALUES(GETDATE())GOCREATE PROCEDURE dbo.TestSelect ASSELECT * FROM tblTestDROP TABLE tblTestIn the above example, if the SPs are owned by dbo (as above), CREATETABLE & DROP TABLE use MyUser.tblTest while INSERT & SELECT usedbo.tblTest.If the SPs are owned by the user (eg MyUser.TestInsert), it workscorrectly (MyUser.tblTest is used throughout) but I would have to havea pair of SPs for each user.* I have MS Access ADP front end linked to a SQL Server database. Forreports with complex datasets, it times out. Therefore it suit mypurposes to create a temporary table first and then to open the reportbased on that temporary table.
View 6 Replies View RelatedSQL 2012 :: Split Data From Two Columns In One Table Into Multiple Columns Of Result Table
Jul 22, 2015So I have been trying to get mySQL query to work for a large database that I have. I have (lets say) two tables Table_One and Table_Two. Table_One has three columns: Type, Animal and TestID and Table_Two has 2 columns Test_Name and Test_ID. Example with values is below:
**TABLE_ONE**
Type Animal TestID
-----------------------------------------
Mammal Goat 1
Fish Cod 1
Bird Chicken 1
Reptile Snake 1
Bird Crow 2
Mammal Cow 2
Bird Ostrich 3
**Table_Two**
Test_name TestID
-------------------------
Test_1 1
Test_1 1
Test_1 1
Test_1 1
Test_2 2
Test_2 2
Test_3 3
In Table_One all types come under one column and the values of all Types (Mammal, Fish, Bird, Reptile) come under another column (Animals). Table_One and Two can be linked by Test_ID
I am trying to create a table such as shown below:
Test_Name Bird Reptile Mammal Fish
-----------------------------------------------------------------
Test_1 Chicken Snake Goat Cod
Test_2 Crow Cow
Test_3 Ostrich
This should be my final table. The approach I am currently using is to make multiple instances of Table_One and using joins to form this final table. So the column Bird, Reptile, Mammal and Fish all come from a different copy of Table_one.
For e.g
Select
Test_Name AS 'Test_Name',
Table_Bird.Animal AS 'Birds',
Table_Mammal.Animal AS 'Mammal',
Table_Reptile.Animal AS 'Reptile,
Table_Fish.Animal AS 'Fish'
From Table_One
[Code] .....
The problem with this query is it only works when all entries for Birds, Mammals, Reptiles and Fish have some value. If one field is empty as for Test_Two or Test_Three, it doesn't return that record. I used Or instead of And in the WHERE clause but that didn't work as well.
Reporting Services :: Share Point List Data Set Parameter Allow Null In Multivalue Drop Down Parameter
Aug 28, 2015my dataset from sharepoint list. and this dataset value assign to parameter. i want when no any parameter is selected than it should filter like "ALL". when i select alow null value it give me prompt error you  can not select null in multivalue parameter.How can i do it. i am using share point list.
View 3 Replies View RelatedNull Columns
Jun 14, 2001ColumnA has existing data in it some of the data are Nulls
what would be the best way to have new as well as existing
data change to 0, using a constraint?
Columns [not Null]
Oct 15, 2006hi, I have a problem with a flat file and a table
I have a flat file with 5 columns and in the table I have 30 columns and they all are (not null)
I cannot leave other columns in target for which it throws mistake, have to insert something, since as I insert information in the demas columns???
Since I can solve this problem???
helps please
Help Altering Database Table From NULL To NOT NULL
Jun 28, 2004I would drop and add the table but the data can't be deleted. So if anyone could help with the statement it would be greatly appreciated. Thanks
View 7 Replies View RelatedCounting NULL Columns?
May 14, 2004If I had a basic table with 3 VARCHAR fields; let's say A, B, C
How could I write a query that returns the count of the number of NULL columns for every record in a table?
Ideally, it would be something like:
SELECT
CAST (A IS NULL) AS INTEGER
+ CAST (B IS NULL) AS INTEGER
+ CAST (C IS NULL) AS INTEGER
FROM MyTable
That doesn't work at all. I can't seem to do "IS NULL" in the SELECT area. Should I write a T-SQL user-defined function that takes all three columns as parameters? Would that be performance friendly for large data sets?
Check For Not Null In Either Of Two Columns
Apr 14, 2015Content table
deleteddate revokeddate
1/1/2001 null
null 2/2/2003
4/5/2004 null
I am trying to create a stored procedure where.I need to loop through every row of the table and check if there exists a date in either of the column. If date exists in either of the column for every row, I need to update some other stuff.For the above table, it meets my requirement, so I need to update. However if the table is as below, it doesn't meet the requirement, so I don't need to update
deleteddate revokeddate
1/1/2001 null
null null
4/5/2004 null
I started off as below, But I am getting incorrect values.
Declare @deleterevoke bit
Declare @DelRevId int
Declare @DelRevnumrows int
Declare @tempDeletedDate datetime
Declare @tempRevokedDate datetime
[code]....
Return Only Columns That Are Not Null
Feb 20, 2006johnny writes "I am trying to return only the columns from multiple tables that are NOT NULL for a specific ID. Once I have the tables JOINED is there a way to only get those columns that are populated. Thanks."
View 2 Replies View RelatedProblem With NULL Columns
Jun 14, 2007This procedure doesnt increment the "Views" column like it should when the value is NULL (not zero)
CREATE procedure [dbo].[sp_theDb_image_addView]
@imageId int
AS
SELECT [views],
CASE WHEN [views] is null then 1
END
FROM theDb_image WHERE imageId=@imageI
UPDATE theDb_image SET [views] = [views] + 1 WHERE imageId=@imageI
The CASE statement apparently isn't working.... any advice?
Thanks.
Returning # Of Columns With Non-null Value
Jul 20, 2005Using SQL2000. I want to return the # of columns with non-nullvalues. Here's my query so far:selectcase when Dx1 is not null then 0 else 1 end +case when Dx2 is not null then 0 else 1 end +case when Dx3 is not null then 0 else 1 end +case when Dx4 is not null then 0 else 1 end as DxCountfrom tblClerkshipDataCleanwhere PalmName = @PalmNameThere are 7 rows for the particular PalmName I'm using. The queryreturns a result of 7. However, there are 25 values in Dx1 thru Dx4so the query should be returning 25.What am I doing wrong here? Thanks in advance.
View 4 Replies View RelatedDetermining What Columns Are All Null
Jul 6, 2006Does anyone have a suggestion for how to efficiently determine what columns in a table are NULL for all rows? - Shean
View 5 Replies View RelatedStorage Of Null Columns
May 23, 2007Hi,
This question comes without the wish for any philosofical debates concerning NULL
Normally SQL Server 2005 uses 13 bytes to store a NUMERIC(22,7) value. Does it use the full 13 bytes when the column contains NULL as well? And what about DATETIME and (BIG)INT? Most of the info on storage of NULL values is about varchar/char/nvarchar/varchar...
Thnx, Jeroen.
Error Selecting Null Columns
Jun 22, 2007I want to run a query that selects rows from the table where a datetime column has null values;
select * from Orders where IsNull(dClosedDate,'Null') = 'Null'
However i get this error:
Conversion failed when converting datetime from character string.
Any help appreciated
Xsd Files And Null Datetime Columns
Feb 5, 2008Ive created a Data Access Layer (xsd file) and some of the tables have DateTime columns. I need to allow NULL values to be saved, but when I try to do that I get an error
In my code (c#) ive used Nullable DateTime, but when I try to assign a nullable Datetime to a DateTime column, I get this error
cannot implicitly convert type 'System.DateTime?' to 'System.DateTime'
I understand the reasons why, so how do I save null DateTime values to the underlying database through a schema ?
In the schema file, the DateTime columns have <DBNULL> as the default value, AllowBDNull is true, but I am only allowed 'Throw exception' on the NULL value property
I could probably do this another way (by not using a schema and writing the code myself) but Id prefer to keep the strongly typed code.
I dont want to use MAx or MIn values for the default datetime values, so how can this be done ?
Determining Null Values In Columns
Sep 7, 2004How to find out that there is a null value in a column rather than a valid integer, DateTime or bool value, for strings I use 'as' operator to cast the column value and it returns null when column value is null, but for value types using 'as' operator causes compile error and using simple casting causes runtime error, for example:
int count = (int)row["Count"];
and
int count = row["Count"] as int;
the first one throws an exception when Count is null and the second doesn't compile at all since 'as' applies to reference types, so what is the way other than exception handling to determine null value in a column?
Divide Two Columns With Null Values
Aug 14, 2014I am trying to divide these two columns...
parsename('$'+ Convert(varchar,Convert(money,Q.[Product Cost]-R.[Shared Cost]),1),2) as [Pre Cost],
parsename('$'+ Convert(varchar,Convert(money,R.[New Product Cost]-R.[Shared Cost]),1),2) as [Post Cost]
Formula:
[Post Cost] / [Pre Cost]
Expected:
If [Post Cost] is null then I would need to assign 1 and divide by [Pre Cost] and similarly if [Pre Cost] is null then I would need to assign 1 so that I can divide [Post Cost] / [Pre Cost]