Changing The DataType Of A Coluumn In An In-Memory Dataset
Apr 11, 2005
Here is the issue. I have ReadOnly Access to a database. All of the Columns are set to NVARCHAR(1000) by default. I cannot change them. I want to load the DataSet into memory and change the DataType of the columns from NVARCHAR(1000) to INT(4). The data is in integer (i.e. 4,5,123) format (but stored as a string), but is coming across as strings. The charting software I am using won't implicitly convert these Strings to Int or Double. How can I change an entire column to Int?
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Dec 2, 2006
Hello I am having a table
table1
col1 (bit)
and i want to changethe col1 type for smallint
col1 (smallint)
true will be = 1
and false = 0
how can i do it ??
thank you
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Jul 20, 2005
Hi all,I need to change a varchar from 35 to 50. In the SQL Server books online it says that SQL Server actually creates a new table when youchange the length. I ran a test in a test database and it appears theonly thing that changes is the length. All the data remains in tact.The table with the column I want to modify is very critical. Is thereany chance I would loose data if I change the length to a larger size? Iam making a back up of the table just in case. Thanks,Kelly
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Nov 4, 2006
Hello,
I'm having trouble extracting the datetime value of a datacolumn in order to compare it's value to another datetime. The error I get is "unable to cast object of type System.Data.DataColumn to type System.DateTime. I'm sure I'm just missing a step or a cast, but nothing has worked. I hope someone can help!
Here's the code:
protected void ddlRooms_SelectedIndexChanged(object sender, EventArgs e)
{
SqlCommand cmd;
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["EventBookingConnectionString"].ConnectionString);
SqlDataAdapter da;
DataSet ds;
try
{
cmd = conn.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "SELECT Events.ID as 'Event ID', Name as 'Event Name', Rooms.Room as 'Event Room', AttendeeList as 'Attendee List', EventDate as 'Event Date' from Events INNER JOIN Rooms on Events.Room=Rooms.ID";
ds = new DataSet();
da = new SqlDataAdapter();
da.SelectCommand = cmd;
da.Fill(ds, "BookedRooms");
if (ds.Tables["BookedRooms"].Columns["Event Room"] != null)
{
foreach (DataRow row in ds.Tables[0].Rows)
{
string room = (string)row["Event Room"];
if (ddlRooms.SelectedItem.ToString() == room)
{
System.DateTime date = (System.DateTime)ds.Tables[0].Columns["Event Date"]; //HERE'S WHERE THE ERROR OCCURS
if (Calendar1.SelectedDate == date)
{
lblBookedRooms.Visible = true;
lblBookedRooms.Text = "I'm sorry, that room is booked for that day.<br />Please choose another day or a different room.";
}
}
}
}
}
catch (Exception ex)
{
lblResults.Text = ex.Message;
}
}
Thanks in advance to anyone willing to help out!
Monster
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Nov 16, 2006
We are trying to update a changed DataSet to at table in MSSQL server
The table have an XML field and that gets converted to System.String when we get from the DB when we try to save the dataset the XML field ind the table is set to NULL
How can this be, the DataSet can convert it to System.String when we SELECT it from the DB, but when we save, nothing happens and we get an empty field. Not even an SQL error...
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Oct 27, 2003
Hi guys,
Is there any way or method to CHANGE the DATATYPE of a column in a published table being used for transactional replication (MSSQL 2000), WITHOUT DROPPING THE SUBSCRIPTION ????
Im stuck in this mess and do have the option to drop the subscription, alter the table, create the subscription and rerun the snapshot or to recreate it by Manual Synchronisation either.
Can anyone help? Has anyone been across this dilemma before and have troubleshooted the problem? If yes, help is much appreciated.
MY PROBLEM:
~~~~~~~~~~~~~
'MyTable' is currently being published and has subscriptions to it. The PRIMARY KEY column 'id' has an Identity property as well. 'id' is of datatype smallint, however because of bad planning, i now need to change that datatype to an integer to support a larger range WITHOUT DROPPING SUBSCRIPTIONS.
I CANT DROP THE COLUMN EITHER AS IT IS BEING THE PRIMARY KEY COLUMN.
IS THERE ANY OTHER WAY I CAN DO TO ARCHIEVE MY GOAL? THANKYOU.
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Feb 28, 2002
Changing datatype in a table used for merge replication ?
I'm trying to change the data type on a column in a table that is used for a merge-replication with another (identical) DB.
I get this error:
Cannot alter the table '[Tablename]' because it is being published for replication.
I've tried to remove that specific table from the publication (Publication properties -> Articles tab) so I can change the data type and then put the table back into the publication, but I can't (probably because it's a MERGE rep.)
Any ideas ?
/CN
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Oct 15, 2015
I am trying to make the following update: All the columns are fine except for the 'name' column. datatype for 'name' column in the target table is varchar(30) and the datatype for 'name' in the sourcetable is varchar(40), I cannot change the datatype of the column 'name' to varchar(40) because I am told it may affect performance. what I want to do is just update the first 'name' column of the target table by the first 30 characters of the source table column 'name'
I am using the following query, is it possible to do it or are there any other ways I can update the column without changing the datatype?
MERGE INTO [S].[dbo].[AF_Copy] AS TargetTable
USING (SELECT source_code, name, addr1, city, zip FROM
[D].[D_TEST].[dbo].[SO_Copy]) AS SourceTable
ON ([TargetTable].[Code] = [SourceTable].[source_code])
[code]...
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Jul 20, 2005
I am trying to run the following query:ALTER TABLE dnb_profileALTER COLUMN [family update date] datetimeand I keep getting the following error:Server: Msg 242, Level 16, State 3, Line 1The conversion of a char data type to a datetime data type resulted inan out-of-range datetime value.The statement has been terminated.Can anyone tell me how I can do this successfully??Thanks,Connie SawyerFoley & LardnerJoin Bytes!
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May 20, 2015
I have a field in a table
FormID nvarchar(6)
i want to change the length of the datatype to nvarchar(8).
what is the best way to do with out dropping the table?
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Oct 16, 2007
Is there a way to strip off the time portion of a datetime datatype without changing the datatype?
I know I can convert it using CONVERT (NVARCHAR(10), dbo.tblPayments.PaymentDate, 101) but I need to keep it as a datetime datatype?
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Jan 29, 2002
Usually all the user datatypes in our databases have the owner dbo.
One has a few that are owned by a user with dbo rights. I am trying to change them to dbo owner.
Sp_changeobjectowner gives 'object does not exist'
Any ideas
Jim
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Jul 13, 2004
Hi,
I need to change the datatype of a very large table from smallint to int...
What would be an ideal solution to get this done in least amount of time. May be I can try with ALTER but , I am not sure about the time it would take ...and the page splits etc..
pls help on the same!!
Thanks
Cheriyan.
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Feb 12, 2008
Hello,
maybe it's a silly question...
I've created a new report by the wizard (including a data query). In the dataset frame my dataset contains the queried items.
But when I change to data view and back to layout view in the designer frame, my dataset is cleared.
Is this a bug or normal behaviour?
Regards
Rayko
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May 1, 2007
Hi all,
Is there a way to change the dataset being used by a table dynamically ?
Regards,
Neil
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Apr 9, 2015
I am building a table change log that will track each attribute update and include the original and new values.
[BatchYearMonthKey] [int] NULL,
[BatchYearMonthDayKey] [int] NULL,
[AccountID] [varchar](200) NULL,
[Attribute] [varchar] (200) NULL,
[Old_ValueAtrDefault] [varchar] (200) NULL,
[New_ValueAtrDefault] [varchar] (200) NULL,
[Old_ValueAtrLong] [varchar] (max) NULL,
[New_ValueAtrLong] [varchar] (max) NULL
The challenge that the spectrum of varchar lengths across the table. I have one attribute that requires varchar(max) and all other attributes (about 40) are varchar (200).
I am trying to accomplish the following:
Account ID Status
1 Enabled
Now changed to
AccountID Status
1 Disabled
My log table will look like the following:
[BatchYearMonthKey] BatchYearMonthDayKey] [AccountID] [Attribute] [Old_ValueAtrDefault] [New_ValueAtrDefault] [Old_ValueAtrLong] [New_ValueAtrLong]
201504 20150409 1 Status Enabled Disabled NULL NULL
My question:
I created two fields (Old_ValueAtrLong and New_ValueAtrLong) dedicated for the one attribute that is a varchar (max). I was trying to avoid storing [Status] for example that's a varchar(200) in a field that is varchar(max). Is this the right approach? Or are there other recommendations in how to handle storing the data in the most efficient manner?
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Feb 26, 2004
If I change the Maximum Memory option (sp_configure or vai EM), do I need to restart the MSSQL service?
Clive
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Aug 27, 2015
I need to change the table codes to in memory optimized but every time I try to change I got an error message like you need to change database to memory optimize.
So, I try to change it using this code:
ALTER DATABASE Coralreef_ ADD FILEGROUP Coralreef__mod CONTAINS MEMORY_ OPTIMIZED_ DATA.
When I used this I got an another error:
Msg 10797, Level 15, State 2, Line 1..Only one MEMORY_OPTIMIZED_DATA filegroup is allowed per database.
So, How can I change database to in memory optimized database.
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Feb 27, 2006
Hi,
I'm running an application on a server which grabs data from a database table on another server using SqlConnection, SqlDataAdapter and DataSet.
The application then updates every row in that DataSet's DataTable and the updates are saved back using DataAdapter. The code is pretty much straightforward code that you would find on MSDN documentation for using DataSets. The table contains a little over a million rows.
When I run the application, I get an error saying the Server Application is not available. Upon looking into the application event log, I get this message.
aspnet_wp.exe was recycled because memory consumption exceeded the 306 MB (60 percent of available RAM)
How do I get round this? I thought DataSets were supposed to handle large datatables comfortably without having memory issues.
-Thanks
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Sep 13, 2006
I am trying to use the results of a query to build an XML file (this will eventually be data from a number of RDBMS's and will undergo transformations and unions prior to being saved as a package variable).
I have saved the results of my query to a result set variable (ADOResultSet) using the Recordset Destination.
I then try to use a script task to read the variable and create an XML file. I get a runtime error Unable to cast COM object of type 'System.__ComObject' to class type 'System.Data.DataSet'.
Public Sub Main()
'MsgBox(Dts.Variables("ADORecordSet").Value.ToString)
Dim mySet As DataSet
mySet = (CType(Dts.Variables("ADORecordSet").Value, DataSet))
mySet.WriteXml("C: est.xml", XmlWriteMode.WriteSchema)
Dts.TaskResult = Dts.Results.Success
End Sub
I am very unfamiliar with Visual Basic and am unsure of how to cast the COM object to a DataSet. Do I need to marshal the COM object?
Thanks
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Jan 28, 2015
Need to know if the varchar datatype field will ingore leading zeros when compared with numeric datatype ?
create table #temp
(
code varchar(4) null,
id int not null
)
insert into #temp
[Code] .....
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Apr 24, 2008
Good afternoon,
I have an issue with an ssis variable datatype.
The scenario is as follows:
I have a stored procedure:
PROCEDURE [dbo].[sp_newTransaction]
@sourceSystem varchar(50),
@txOut NUMERIC(18,0) OUTPUT
AS
insert into scn_transaction (sourceSystemName) values(@sourceSystem);
SELECT @txOut = @@identity
Whose purpose is to perform an insert into a table and return me the identity value of the inserted record, which I'll then use throughout the rest of my package. The identity column in the inserted table is numeric(18,0).
I execute the stored proc with the following sql with an OLE DB connection manager:
exec sp_newTransaction ?, ?
The first parameter is a string variable from earlier in the package, and the second is the output parameter. I have the following parameter mappings to the execute sql task:
User:ystxId output numeric 1 -1
User:ourceSys input varchar 0 -1
The proc is correctly called, and the row insesrted, however I get a type conversion error when SSIS attempts to map the return parameter to my package variable... I've tried all sorts of combonations, and can't seem to get it to execute.
At one point I wasn't returning a numeric, but rather an int from the stored proc, and all was well until I went to use the variable in a derived column later in the package, and the type was converted quite incorrectly (a 1 was 77799789080 or some such), indicating a type conversion error likely related to the encoding of the number.
I'd like to keep the datatypes as numeric and make ssis use those - any pointers are greatly appreciated as to what type my package variable should be to allow proper assignment of a sql server numeric type to it.
Thanks much,
B
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May 26, 2015
I have a report with multiple datasets, the first of which pulls in data based on user entered parameters (sales date range and property use codes). Dataset1 pulls property id's and other sales data from a table (2014_COST) based on the user's parameters. I have set up another table (AUDITS) that I would like to use in dataset6. This table has 3 columns (Property ID's, Sales Price and Sales Date). I would like for dataset6 to pull the Property ID's that are NOT contained in the results from dataset1. In other words, I'd like the results of dataset6 to show me the property id's that are contained in the AUDITS table but which are not being pulled into dataset1. Both tables are in the same database.
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Oct 1, 2015
I have a small number of rows in a dataset, Table 1. There is a CLOB on a large dataset, Table 2. They join on a PK. I would like to retrieve this CLOB and add it to the data flow for Table1. In short I want to emulate the following:
Table 1: Small table without CLOB, 10 rows.
Table 2: Large table with CLOB, 10,000,000 rows
select CLOB
from table2
where pk = (select pk from table1)
I want this to return the CLOBs for the small number of rows in Table 1. The PK is indexed obviously so it should be a fast look up.
Table 1 and Table 2 live on different Oracle databases. How do I perform this operation efficiently in SSIS? It seems the Lookup and Merge Join wont do this.
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May 27, 2015
I have a report with multiple datasets, the first of which pulls in data based on user entered parameters (sales date range and property use codes). Dataset1 pulls property id's and other sales data from a table (2014_COST) based on the user's parameters.
I have set up another table (AUDITS) that I would like to use in dataset6. This table has 3 columns (Property ID's, Sales Price and Sales Date). I would like for dataset6 to pull the Property ID's that are NOT contained in the results from dataset1. In other words, I'd like the results of dataset6 to show me the property id's that are contained in the AUDITS table but which are not being pulled into dataset1. Both tables are in the same database.
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Sep 17, 2003
Database is SQL Server 2000
I have a field in a table that stores date of birth. The field's datatype is char(6) and looks like this: 091703 (mmddyy). I want to convert this value to a datetime datatype.
What is the syntax to convert char(6) to datetime?
Thank you in advance.
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Mar 14, 2008
Hi,
I imported a table from Accees to SQL 7 with data in it.
I need to modify one of the datatype columns to "datetime" from nvarchar.
I tried to convert it manually, in SQL Server Enterprise Manager tool, but it gave me an error.
I also tried, creating another column "DATE2-datatype:datetime" and updating the column with the old one.
UPDATE users SET DATE2 = DATE.. But it also faild,..
How can I modify the column?
Thank you.
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May 21, 2007
I found out the data I need for my SQL Report is already defined in a dynamic dataset on another web service. Is there a way to use web services to call another web service to get the dataset I need to generate a report? Examples would help if you have any, thanks for looking
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Oct 12, 2007
Is there any way to display this information in the report?
Thanks
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May 7, 2008
Hi,
I have a stored procedure attached below. It returns 2 rows in the SQL Management studio when I execute MyStorProc 0,28. But in my program which uses ADOHelper, it returns a dataset with tables.count=0.
if I comment out the line --If @Status = 0 then it returns the rows. Obviously it does not stop in
if @Status=0 even if I pass @status=0. What am I doing wrong?
Any help is appreciated.
ALTER PROCEDURE [dbo].[MyStorProc]
(
@Status smallint,
@RowCount int = NULL,
@FacilityId numeric(10,0) = NULL,
@QueueID numeric (10,0)= NULL,
@VendorId numeric(10, 0) = NULL
)
AS
SET NOCOUNT ON
SET CONCAT_NULL_YIELDS_NULL OFF
If @Status = 0
BEGIN
SELECT ......
END
If @Status = 1
BEGIN
SELECT......
END
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Dec 15, 2005
HI,I have a table with IDENTITY column with the datatype as INTEGER. Nowthis table record count is almost reaching its limt. that is totalrecord count is almost near to 2^31-1. It will reach the limit with inanother one or two months.In order to avoid the arithmentic overflow error 8115, we would likechange the datatype from INT to BIGINT. we hope this will solve ourproblem.How do I approch this datatype conversion?. Since the data count ishuge, that leads to a long down time of database.we need better approach or solution for this problem?. kindly give mea better solution that will reduce the total downtime of the productiondatabase.?.Regards
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Feb 25, 2008
Hi guys..
i have so doubts in my mind and that i want to discuss with you guys... Can i use more then 5/6 fields in a table with datatype of Text as u know Text can store maximu data... ? acutally i am trying to store a very long strings values into the all fields. it's just popup into my mind that might be table structer would not able to store that my amount of data when u use more then 5/6 text datatypes...
and another thing... is which one is better to use as data type "Text" or "varchar(max)"... ?
if any article to read more about these thing,, can you refere to me...
Thanks and looking forward.-MALIK
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Jul 13, 2015
I am looking to test this feature - and the "Transaction Performance Collector" has recommended me a table to port to In-Memory OLTP.
I have now tried the "Table Memory Optimization Advisor" tool.
After a couple of tweaks to the table design - the tool is now passing validation but the tool is not allowing to progress to the next step:
Could it be down to not having enough memory? But would this not show in the advisor?
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