Creating /accessing Tables With Dynamic Names
May 17, 2004
Hi
I have developed an application in ASP/SQL server 7.
Ths system is single user. One of the tables is updated by usr actions( say Table A).
To make it multi user. I want to create table such as A_Username.
How can query be written for this. Also there are many stored procedures which will access this table. In these stored procedures i will send username as an input. Then the query in the stored procedure shd access the table as A_Username .
Such dynamic table name refrencing , how can it be done.. Is creating a string for the query and then executing it using sp_exec the only option?
pls suggest
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Oct 5, 2007
Firstly I consider myself quite an experienced SQL Server user, andamnow using SQL Server 2005 Express for the main backend of mysoftware.My problem is thus: The boss needs to run reports; I have designedthese reports as SQL procedures, to be executed through an ASPapplication. Basic, and even medium sized (10,000+ records) reportingrun at an acceptable speed, but for anything larger, IIS timeouts andquery timeouts often cause problems.I subsequently came up with the idea that I could reduce processingtimes by up to two-thirds by writing information from eachcalculationstage to a number of tables as the reporting procedure runs..ie. stage 1, write to table xxx1,stage 2 reads table xxx1 and writes to table xxx2,stage 3 reads table xxx2 and writes to table xxx3,etc, etc, etcprocedure read final table, and outputs information.This works wonderfully, EXCEPT that two people can't run the samereport at the same time, because as one procedure creates and writesto table xxx2, the other procedure tries to drop the table, or read atable that has already been dropped....Does anyone have any suggestions about how to get around thisproblem?I have thought about generating the table names dynamically using'sp_execute', but the statement I need to run is far too long(apparently there is a maximum length you can pass to it), and evenbreaking it down into sub-procedures is soooooooooooooooo timeconsuming and inefficient having to format statements as strings(replacing quotes and so on)How can I use multiple tables, or indeed process HUGE procedures,withdynamic table names, or temporary tables?All answers/suggestions/questions gratefully received.Thanks
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Sep 26, 2007
Hi,
I want to create a local temporary table in execute sql task and and want to use the same in Data flow task as source table.
I follow the following steps to achieve this:
01. Created a new SSIS package
02. Create a connection string to "(local)/." server, "tempdb" database
03. Set the "RetainSameConnection" property value to "TRUE"
04. Set the "DelayValidation" to "TRUE", where ever I found this property
04. In Control Flow I added to items
a. Execute SQL Task
b. Data Flow Task
05. For "Execute SQL task" I set the connection to "tempdb"
06. I written the following query
Create table #transfer_CompaniesToProcess_tbl
(
companyID int not null
)
GO
07. In Data Flow task I added "OLE DB Source" and "OLE DB Destination"
08. In "OLE DB Source" I changed the "Data access mode:" to "SQL command"
09. In "SQL command text:" I entered "select * from #transfer_CompaniesToProcess_tbl"
10. When I clicked on the "OK" button; I ended with following error:
TITLE: Microsoft Visual Studio
------------------------------
Error at Data Flow Task [OLE DB Source [1]]: An OLE DB error has occurred. Error code: 0x80040E14.
An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80040E14 Description: "Statement(s) could not be prepared.".
An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80040E14 Description: "Invalid object name '#transfer_CompaniesToProcess_tbl'.".
------------------------------
ADDITIONAL INFORMATION:
Exception from HRESULT: 0xC0202009 (Microsoft.SqlServer.DTSPipelineWrap)
------------------------------
BUTTONS:
OK
------------------------------
I gone through the following article and it seems I missed some thing.
http://blogs.conchango.com/jamiethomson/archive/2006/11/19/SSIS_3A00_-Using-temporary-tables.aspx
Can any one have any idea where I am doing wrong?
Thanks
Sreekanth
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Feb 15, 2011
I have a scenario, need to create SQL server Tables dynamically.
I Have multiple xml data file on a particular location, and want to load those XML data into sql server tables, but he metadata of each xml data files are not same.
Hence the approach is that,
1. Pick first file from that location
2. Create a table according to that xml data file metada
3. load data on newly created table.
4. Pickup the next xml data files.
5. loop through, till the XML data files are exists on that location.
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Aug 31, 2004
Hi,
I am looking for some help in MS SQL server. I want to access the columns of a table without using the names of the colulmns.
Example - SELECT table1.field[1], table1.field[2] FROM table1;
Any information to this effect is much appreciated.
cheers/- Pradeep
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Apr 17, 2007
I have been trying to access the PropertyNames and the data contained with in the PropertyNames and PropertyValuesString (aspnet_Profile Table). I have data contained in those Rows but can't seem to retrieve the data via SqlDataSource.
When i use a SqlDataSource with a FormView and "configure" the SqlDataSource the PropertyNames and PropertyValuesString isn't listed. In "Specify columns from a Table or View"
The only Columns that are showing up for the aspnet_Profile Table in (ASPNETDB)...
*
UserId
LastUpdatedDate
DataSize
So how can i retrieve the information contained in the PropertyNames & PropertyValuesString??
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Jan 1, 2008
Hello,I'm still extremely novice to SQL and I've tried googling how to produce this result but I've been encountering a lot dynamic sql commands which isn't exactly what I want. If this is an ignorant question I do apologize but heres my scenario: I have a table with columns of the day, for instance: Monday_hasData (bit)Monday_DataAnd what I want to do is essentially pass in "Monday" as a parameter and rather than doing an If statement on each row, I would like to just like to do something like assign @dayCheck + "_hasData" to a variable and then use @dayCheck as part of my query. Is this possible or am I going to have to have 7 cases? Thank you for any input,Chance
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Jun 10, 2004
Hi is possible to create dynamic column name
example
Declare
@StartDate as dateTime
Select @StartDate = '2004-06-05'
select
SUM(Case When table1_date BETWEEN dateadd(day,-6,@StartDate) and @StartDate then 1 else 0 end)AS [dateadd(day,-6,@StartDate)],
SUM(Case When table1_date BETWEEN dateadd(day,-13,@StartDate) and dateadd(day,-7,@StartDate) then 1 else 0 end)AS [dateadd(day,-13,@StartDate)]
from
table1
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Jan 19, 2005
thanx for the help in advance,
i have a table with Monday, Tuesday, Wednesday. .... Sunday
i get the weekday by
select @stat = datename(dw, getdate()) which in this case is Wednesday
but when i do something like
select top 2 * from myTable
where 'myTable.'+@stat = 1
which is as same as
select top 2 * from myTable
where myTable.wednesday = 1
i receive a syntax error. how can i dynamically select myTable.Wednesday ?
i also tried using
select top 2 * from Intercon
where '@stat' = '1'
but then this doesn't return anything where it should.
any help?
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Jun 5, 2008
Hi all,
I have been attempting to construct some dynamic SQL using a table name as a parameter, and call it using sp_executesql, in SQL Server 2005.
According to all of the searches and articles I have read today, the following should work:
DECLARE @rownumINT
DECLARE @tabNamNVARCHAR(100)
DECLARE @SQLStringNVARCHAR(500)
DECLARE @ParmDefinition NVARCHAR(500)
SET @rownum = 35
SET @tabNam = 'AdminScriptHistory'
SELECT @SQLString = N'SELECT * FROM @table where executionorder=@row'
SET @ParmDefinition = N'@table VARCHAR(100), @row INT'
EXEC sp_executesql @SQLString, @ParmDefinition, @tabNam,@rownum
However, it fails with:
Msg 1087, Level 15, State 2, Line 1
Must declare the table variable "@table".
Anybody know why?
Cheers
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Aug 28, 2007
Got my first real job to do in SSIS and it's not really much fun. Here goes. I have excel files from various vendors, none of which are in the same format. Now I'm less concerned with the names, I have those in variables so that's not a big deal. My issue is around the column names. Let's say we have file a, b and c. In file a the first name field is called [first name], in file b it's first_name and in file c it's firstname. What I want to do is create 1 package that can handle these files regardless of how first name is spelled. I was thinking I could open the file and somehow search for a column name that contained the word "first%" and then map the column name to a variable. I'm sort of stuck though on how to actually do that. Help. And please don't tell me to tell the vendors to standardize. That's the end goal but it's like herding cats.
Mike
"oh, that monkey is going to pay"
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Aug 9, 2007
Hi guys 'n gals,
I am trying to achieve something a bit complex (or at least appears to be for me).
I have the following table structure:
UID, GroupID, ColumnName, ColumnValue
here is some example data:
UID, GroupId, ColumnName, ColumnValue
1, 1, MAC Address, 8a7sd87sad
2, 1, IP Address, 192.168.1.100
3, 1, Name, John
4, 2, MAC Address, 09a8sd098as
5, 2, Name, Steven
and here is what I would like the example to come out like:
GroupID, MAC Address, IP Address, Name
1, 8a7sd87sad, 192.168.1.100, John
2, 09a8sd098as, NULL, Steven
It needs to be completely dynamic though, as a new column name could be entered to the source table at any time...
I have tried Dynamic SQL and JOINs, but can only seem to get it to work correctly. I was starting to consider doing a loop similar to this:
Code Snippet
DECLARE @ColumnName varchar(128)
DECLARE @Sql varchar(255)
SELECT @ColumnName = [ColumnName] FROM tblSourceData
SELECT @Sql = 'SELECT [GroupId], [ColumnValue] AS ['+@ColumnName+'] FROM tblSourceData'
EXEC (@Sql)
Could somebody please point me in the right direction? I've heard a bit about Pivot tables in my search for this solution, is that perhaps the route I need to go?
Regards,
Justin
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Oct 7, 2015
I am using the following select statement to get the row count from SQL linked server table.
SELECT Count(*) FROM OPENQUERY (CMSPROD, 'Select * From MHDLIB.MHSERV0P')
MHDLIB is the library name in IBM DB2 database. The above query gives me only the row count of table MHSERV0P. However, I need to get the names, rowcounts, and sizes of all tables that exist in MHDLIB librray. Is it possible at all?
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Jul 20, 2005
Hi,I am trying to create a stored procedures (SQL 7.0), to provide dataina crosstab format.(I'm using Crystal Reports 8.5, but the Crosstab capabilities areterrible, so I have to do as much as possible on the SQL side)I have a table [Occurrences] with the following fields:Year (int)Month (int)Occurs (int)Claims (int)I need a query to give me the following format:Acct_Month 2001 2002 2003Occurs Claims Occurs Claims Occurs ClaimsJanuary 120 180 132 196 110 140February 154 210 165 202 144 178March etc.......Catch! I need the Year field name to be the contents of the fieldYear in the Table (2001, 2002, 2003...). Not the usual Year_1, Year_2approach.I got the month name ok...Acct_Month = DATENAME(month, Convert(Varchar(2), Month) + '/01/'+Convert(Char(4),Year))Is it possible to do this easely, without the use of cursors?Any help would be much appreciated.Luis Pinto
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Jul 28, 2006
I am working with an ftp task which is using a file connection to send a file to a remote server. This file is going to have a dynamic name (e.g. "Orders for 2006-07-29.txt"). How can I dynamically specify the file path/name for the file connection? You can't specify a varaible through the ui.
I would imagine that you can do this through a script task but I'm not sure how to reference the connection object. any help would be greatly appreciated.
thanks,
Scott
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Mar 2, 2014
I am trying to create an ssis package with dynamic csv file as output. and out format contains query output.
sample file name:
Unique identifier + query output + systemdate();
The expression is looking like this.
@[User::FilePath] + @[User::FileName] + ".CSV"
-- user filepath is a variable from ssis package. File name is the output from SQL query. using script task i have assigned the values to @[User::FileName] .
When I debugged the script task the value getting properly but same variable am using for Flafile destination. but its not working.
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Oct 13, 2001
I have a quick question on SQL Server. Lets say I have table Order which has column names OrderId, CustomerName, OrderDate and NumberofItems. To select the OrderID values from the table I say
Select OrderId from Order.
But in the select if I want the column name to be variable how do I do it. I tried the following code through a stored procedure.
declare @order_id nvarchar(10)
select @order_id = 'OrderID'
SELECT @order_id from Order.
The code above gave me the string "OrderID" as many times as there were rows in the table but I could never get the actuall values in the OrderId column. Can you please send me some ideas or code where I can get values from the column names and at the same time change the column name dynamically.
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Jul 2, 2007
Hello all,
Im just wondering... is there any way to have dynamic table names, so that, say for instance, i have 4 stored procedures, that all do the same thing, just to four different tables. is there any way to have 1 stored procedure, and pass through the table name???
Adding the four statements into one statement is not an option, as i only need to execute one at a time..., not all four at once...
Cheers,
Justin
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Aug 3, 2007
I am trying to do a PIVOT on a query result, but the column names created by the PIVOT function are dynamic.
For example (modified from the SQL Server 2005 Books Online documentation on the PIVOT operator) :
SELECT
Division,
[2] AS CurrentPeriod,
[1] AS PreviousPeriod
FROM
(
SELECT
Period,
Division,
Sales_Amount
FROM
Sales.SalesOrderHeader
WHERE
(
Period = @period
OR Period = @period - 1
)
) p
PIVOT
(
SUM (Sales_Amount)
FOR Period IN ( [2], [1] )
) AS pvt
Let's assume that any value 2 is selected for the @period parameter, and returns the sales by division for periods 2 and 1 (2 minus 1).
Division CurrentPeriod PreviousPeriodA 400 3000 B 400 100 C 470 300 D 800 2500 E 1000 1900
What if the value @period were to be changed, to say period 4 and it should returns the sales for periods 4 and 3 for example, is there a way I can change to code above to still perform the PIVOT while dynamically accepting the period values 4 and 3, applying it to the columns names in the first SELECT statement and the FOR ... IN clause in the PIVOT statement ?
Need a way to represent the following [2] and [1] column names dynamically depending on the value in the @period parameter.
[2] AS CurrentPeriod,
[1] AS PreviousPeriod
FOR Period IN ( [2], [1] )
I have tried to use the @period but it doesn't work.
Thanks in advance.
Kenny
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Jul 3, 2007
Folks,
I am running into an issue while trying to export data to a spreadsheet. I actually don't know how to do it... Considering I only know the column names by the time I execute my procedure, I can't use the Excel Destination to export data.
With DTSs I would create an ActiveX script to execute the procedure which loads the results into a temp table. After that I would select everything from this temp table and load the results into a record set, looping through this record set to create the destination spreadsheet with the dynamic column names.
When it comes to SSIS we are advised to write vb.net scripts instead of ActiveX... These ones do not have records set's but dataset's, which at first glance are only applicable to xml and not xls files (when I try to define a variable as a dataset in my vb.net code, I face a message saying: Missing reference required to assembly System.Xml...).
How I would create this spreadsheet using a vb.net code in SSIS packages? Please, help...
Thank you.
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Mar 9, 2015
I have query which is used to dynamically insert value but not working. We are trying to get all table names and insert dynamically to all tables by looping through table names.
declare @a varchar(max),@i int;
declare @table table(rno int, name varchar(max))
declare @b varchar(max)
insert into @table
select row_number() over( order by table_name) rno, table_name from INFORMATION_SCHEMA.tables
declare @tblname varchar(max)
[Code] .....
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Apr 9, 2015
I would like to provide the names of columns in an insert statement from a schema table, so that when running through a number of Bus Rule checks I can reference the schema table and only maintain the columns in the schema table rather than maintain named columns in multiple insert statements. So my query for one check looks like below. I'm using dynamic sql to execute the insert statement. My question is, is there a better way or different way to do this without using dynamic sql? Ie, Is there a way that I can use the columns parameter like this instead?
Insert
('+@columns+',KickoutID) Values('+@columns+',1);
Dynamic code:
Declare @columns as nvarchar(max);
Declare @InvSQL as nvarchar(max);
SELECT @columns =
STUFF ((
SELECT ', [' + name + ']'
FROM syscolumns WHERE id = OBJECT_ID('dbo.table_pvt')
[Code] ....
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Sep 16, 2015
I don't know why this is so difficult. What I want to do is take a table name as a parameter to build a query and get an integer value from the result of the query. But from all of the research I have been doing, Dynamic SQL is bad in SQL server because of SQL Injections. But my users are not going to be supplying the table names.
Things I have learned:
- SQL Functions cannot use Exec to execute query strings.
- SQL Functions can return a concatenated string that could be used by a stored procedure to Exec the query string.
So how can I write a stored procedure that will
1. take a parameter
2. Pass the parameter to a function that will return a string
3. Execute that string as SQL
4. Get a return value from that SQL statement
5. Then finally, from a View, how can I pass a parameter to the stored procedure and get the returned value from the stored procedure to be used as a field in the View?
Numbers 3, 4, and 5 are where I am really stuck. I guess I don't know the proper syntax and limitations of SQL Server.
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Jul 20, 2005
Hello,I am interested in dynamically creating temp tables using avariable in MS SQL Server 2000.For example:DECLARE @l_personsUID intselect @l_personsUID = 9842create table ##Test1table /*then the @l_personsUID */(resultset1 int)The key to the problem is that I want to use the variable@l_personsUID to name then temp table. The name of the temp tableshould be ##Test1table9842 not ##Test1table.Thanks for you help.Billy
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Jun 11, 2008
Geekz,
My problem is that , I had setup blog on server say, blog.xyz.com [I am using blogengine.net, which is in ASP.Net]. It is using sql server2005 as a backend for storing its blog's posts. After settingup blog, i tried to access its database through my windows application. But while development I was getting error that
"An error has occured while establishing a onnection to the server. When connecting to SQL server 2005, this failure may be caused by the fact that under the defaukt settings SQL server doesnot allow remote connections.(Provider Named Pipes, error :40 - Could not open a connection to SQL Server)"
I am using [String ConnectionString = "Data Source=sql-v123.mesa11.1Server.net; Initial Catalog=abc; User ID=xyz; Password=xyz123";]
Then I decided to created a webservice that will access the data from databse blog and store it somewhere in datatable and using windows application i will retrieve those data for end user. So I want to to know that whether i can access the datatable of webservice holding the blog data from windows application or not. if answer is Yes, then please provide me with source or some great links. Or if There is any other option so that I can access my database directly from windows application, then it would be better. Looking for your answers.
Thanks and regards
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Feb 26, 2007
Hello,
I have a huge table of around 6.2 billion rows in Oracle and I need to load this table to SQL Server. I am creating multiple raw files based on contact_dates in the table. I have used conditional expressions to branch out and create raw files. I need to specify static file names for each branch or I have to create multiple variables for each branch and use expressions to create file names.
My intention is to create only 1 variable and evaluate the expression based on the conditional expression description. Is this possible?
Regards
RH
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Nov 26, 2013
I need to ensure some naming standards to users while creating tables.
All table name should be in same pattern
(ie., ) TeamName_EmpId_tablename
I need a way to restrict user to follow the naming standard. If any user tries to create table without the above naming standard system should not allow.
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Aug 14, 2006
Is there a way we can programatically create a SQL server Alias name (SQL 2005 - SQL Native client configuration) using either T-SQL, C# etc. - Manmeet
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Jan 9, 2008
hi
i have been tasked with creating a record of all the reports ( 200+ ) within each folder ( bout 20 ) and all the subscriptions (including parameters) for our SSRS i was wondering what the best way of doing this was (SQL query?)
i have tried creating a site map with visio but im struggling to get the subscriptions details
anyone done this before (or have any ideas) i would be very grateful
thanks
Jake
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May 19, 2015
I want to create a raw SQL resultset for outputting to Excel with some artificial headers transposed over the top of the 2nd part of the Union's column names. The first part of the Union will be the Headers. Like this, the space to the left of the topmost columns is preferably empty ....
COL 1 COL2 COL3 COL4 etc. BEH BIG BPL etc.
************************************* INTAKT DEFEKT INTAKT DEFEKT INTAKT
************************************* B E B E B
I just want the text above as a 3 line header and there won't be any values obviously. Then the 2nd query will be joined to the above with a Union all. The 2nd query has all the same column names as what will be given in the first set above. What is the SQL Syntax for doing so? Do I have to use a from clause?
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Nov 13, 2007
Hi All,
any suggestion on creating date time stamped files names for backup file.
I want to create new file for daily backups with date time stamp so i can use Maintenance plans to clean older files in each 4 month cycle.
thanks,
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May 26, 2007
I have a table that I am basically reduplicating a couple of times for each part of this database that I want to create.Each table basically has the same data: The tables will be called motherTable, fatherTable, sonTable, daughterTable and so on.I am pretty much using the following in each column: UserID, MotherID(or FatherID or SonID, etc., etc. and so on for each unique table), FirstName, LastName, MiddleName, BirthPlace, Photo, Age.I don't see an option to copy a table and just modify the second ID part and rename that table accordingly.How can I make this an easier way of creating these similar tables without retyping all these columns over and over again?Thanks in advance.
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Feb 13, 2004
Hello All.
I need your advise on how I could access table from another server.
Let me explain what I am doing. Currently, I have 2 servers running parallel to one another other each loading from the same set of data into its own database in the night.
I would like to write a stored procedure to report the number of records from selected tables from the 2 servers to see if they match in records loaded. Thereafter, email me the results (I have already settle the sending of email part).
Have picked up some tips in this forum to come up with the below statements and it works fine for me: -
use AABBCC (database name)
select Server='Server 009', name, rows, SystemDate=getdate() from sysindexes
where name in ('invoice_line', 'invoice_line_import', 'sales_order_line', 'sales_delivery_line','Cust_dely_reliabity','sales _order_proc_time','AU1016','NZ_Data')
order by name
Result: -
Server Table Name Rows
Server 002AU1016 0
Server 002Cust_Dely_Reliabity 5017342
Server 002invoice_line 4397800
Server 002invoice_line_import 12120
Server 002NZ_Data 649745
Server 002Sales_Delivery_Line 5323875
Server 002Sales_Order_Line 5356989
Server 002Sales_order_proc_time 3651362
Instead of running the above scipt or stored procedure from 2 servers and received 2 email (one from server 002 & one from server 009), I would like to access the other server within the same stored procedure.
I have used sp_addlinkedserver (may not be the correct method) and <servername>.<databasename>.dbo.sysindexes (doesn't work)
Please help. Thanks a million.
The desired result could be:
Server 002 .....
Server 002 .....
.
.
Server 009 ..... (result from the 2nd server)
Server 009 .....
.
.
Best regards
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