Dynamic Column Names In A SP
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_Data
And 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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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 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 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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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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Jan 22, 2004
Hi
I was wondering if anyone has an idea of how we could find the table names and column names of the tables in our Sql server database at runtime/dynamically given our connection string? Please let me know.
Thanks.
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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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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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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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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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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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Aug 25, 2007
Hi Craig/Kamal,
I got your email address from your web cast. I really enjoyed the web cast and found it to be
very informative.
Our company is planning to use SSIS (VS 2005 / SQL Server 2005). I have a quick question
regarding the product. I have looked for the information on the web, but was not able to find
relevant information.
We are getting Source data from two of our client in the form of Excel Sheet. These Excel sheets
Are generated using reporting services. On examining the excel sheet, I found out that the name
Of the columns contain data itself, so the names are not static such as Jan 2007 Sales, Feb 2007 Sales etc etc.
And even the number of columns are not static. It depends upon the range of date selected by the user.
I wanted to know, if there is a way to import Excel sheet using Integration Services by defining the position
Of column, instead of column name and I am not sure if there is a way for me to import excel with dynamic
Number of columns.
Your help in this respect is highly appreciated!
Thanks,
Hi Anthony, I am glad the Web cast was helpful.
Kamal and I have both moved on to other teams in MSFT and I am a little rusty in that area, though in general dynamic numbers of columns in any format is always tricky. I am just assuming its not feasible for you to try and get the source for SSIS a little closer to home, e.g. rather than using Excel output from Reporting Services, use the same/some form of the query/data source that RS is using.
I suggest you post a question on the SSIS forum on MSDN and you should get some good answers.
http://forums.microsoft.com/msdn/showforum.aspx?forumid=80&siteid=1
http://forums.microsoft.com/msdn/showforum.aspx?forumid=80&siteid=1
Thanks
Craig Guyer
SQL Server Reporting Services
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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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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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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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Apr 28, 2008
I need to create the following table in reporting services
PRODUCT April March Feb
2008 2007 2008 2007 2008 2007
chair 8 9 7 4 4 4
table 3 4 5 6 4 6
My problem is the month names are a column in the dataset, but I dont know how to get it to fill as column headers???
Thanks in advance!!!
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Dec 29, 2003
Hello,
Im trying to get the column names from a database and display them in textboxes. someone has already helped me by tellnig me that i need to use the FillSchema command. Which works just fine and I can see only the colum names in a datagrid when i bind it to that.
The problem is that I do not know how to extract the name of a column and put it in to a textbox ?
does anybody know how I can fo this ?
Thanks a million
Rob
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Aug 24, 2005
Hi,How do I display the column names from my Sql server table?In asp3 the recordset allowed thisforeach key in rs ColumnName = key.name ColumnValue = key.valuenextHow do I do this in .Net?I want to use a DataReader so I can read through each record and only display the ones I want.TABLE_ONEColumn_OneColumn_TwoColumn_Threethanks,
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Mar 30, 2004
Hi, i need a query to have the columns names !!
If you have another solution, let me know !!
superj !!!
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Apr 10, 2008
Hi
When I run this query..
SELECT COLUMN_NAME
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME='TableTest'
I get all the column names, but the result is not in the same order as when I check the design for the table, why is that?
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Dec 27, 2005
At my work, we are upgrading a number of MS Access 2000 databases to SQL Server 2000. Many of the columns have names that do not follow the rules for Identifiers. For example there are columns with a numeric names 1,2,3,4,5,6,7,8,9. There are also columns with a hyphen in the name and columns that begin with a number and not an underscore or an alpha character. Plus there are columns with names like first, last, position, etc. (There was also columns with reserved words used as the names. I have changed those column names in the databases that I have already converted) Will leaving these names alone create a problem? The database serves as the backend to ASP pages.
Miranda
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Feb 27, 2008
Hi there,
I am a new member of this site and I am not very much aware of T-sql's working.
My question is what if I need to get one column's data to be the heading of another column.
To be very exact I have a school's database. The table I am talking about is of the results of students. The table contains Student ID, Subject ID, Total marks of the subject, Marks obtained in the subject. Now I want to print a report by generating data from this table. Right now the data is something like this
StuID - - - SubID - - - -Tot - - -Obt
1 - - - - - - -1 - - - - - - -50 - - - 38
1 - - - - - - -2 - - - - - - -50 - - - 41
1 - - - - - - -3 - - - - - - -50 - - - 42
1 - - - - - - -4 - - - - - - -50 - - - 40
2 - - - - - - -1 - - - - - - -50 - - - 35
2 - - - - - - -2 - - - - - - -50 - - - 40
2 - - - - - - -3 - - - - - - -50 - - - 42
2 - - - - - - -4 - - - - - - -50 - - - 41
StudentID and SubjectID fields are related to other tables so I can get the names from there but when I need the report I need the data in the form of
StuID - Sub 1 - - - Sub 2 - - - Sub 3 - - - -Sub4
1 - - - - 38 - - - - - - 41 - - - - - - 42 - - - - - - 40
2 - - - - 35 - - - - - - 40 - - - - - - 42 - - - - - - 41
The Subjects can be different for different students so the query should be dynamic instead of hard coding the names of the subjects. I hope I am clear with my question. The subjectIDs or their names will become the headings and they will contain the obtained marks for that subjects in their columns just for the reports. I have also checked the PIVOT function but was not able to do what I wanted.
Thanks.
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May 30, 2008
Hi all,
By using below query i can get no of tables having the give column name in a particular database,
SELECT COUNT(*) AS CounterFROM syscolumnsWHERE (name = 'empno')
but i want to know the table names too?
any one please suggest me how to find table names too......
In other words i know the particular column name and right now i want to know the table names in which this column name exists.
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Jul 12, 2002
Hi,
I have a table in which out of 20 columns, there will be data only in a few columns. So, I need to find those column names which have data in them. I was able to do it using the information_schema and using a cursor to loop through all the column names and find out which columns have data in them. But i need to know if there is a more efficient way of doing this without using the cursor. Can somebody please let me know how this can be done without using a cursor? Thank you.
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Nov 26, 2002
Can anyone help me with a SQL statement that will list all the column names in a table please ?
I just want to list out the column name so that i can develop asp/vb more effectively than having to use SQLEM and Design table to see the field names.:confused:
thanks
FatherJack
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Aug 19, 2004
I would like to pass into a stored proc the column names I want it to return; how do I do this please?
So I pass in say:
@p_AccountNumber with a value of 'AccountNum'
and the SELECT that the sp fires is of the form
SELECT AccountNum from AccountTable
Any help appreciated
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Mar 7, 2005
Is there a way that you could get the column names for each table in a database using 1 query?
something like:
tbl colname
t1 catID
t1 catName
t2 prodID
t2 prodDesc
t3 cartID
...
...
I know it would be long, but I would just be searching through the saved output for specific names.
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Nov 15, 2005
Hi All,
I was wondering how would I get the column names from a table? Not the results just a listing of column names. What is the command to get this information? I am using MS Access, but I posted here because MS SQL is the closest thing on this forum and the syntax is usually similar.
Thanks a bunch.
Val
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Oct 13, 2005
SQL server throws an exception when I try to run the following code:
ALTER TABLE contacts ADD default ntext NULL;
The reason for that is that "default" is an SQL keyword.
The way I handle this now is I put an underscore at the front:
ALTER TABLE contacts ADD _default ntext NULL
Is there a cleaner way to handle this, i.e. to keep the column name "default" and forse sql server to create a column with this name?
Thank you!
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