Best Approach To Sending Field Names Dynamically
Mar 9, 2007
Hi,
I have a C# web app that searches my database table using the
following search parameters
Search string, criteria (< =) and the field you want to perform your
search on. My understanding is that stored procedure is the way to go.
What's the best way of doing this using stored procedures. Can I
define a placeholder for the field name?
Ex.
SELECT field1, field2... FROM Table WHERE field1='value1' where field1
and value1 are both sent from code.
If it's not possible then what is the best way to approach this
problem? I see so many searches like that on the internet. I can only
do them with inline SQL and not stored procedure.
Thank you
Maz.
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Mar 1, 2015
I am designing a package to export staging tables into a flat file.The names of the tables will be: TableAStaging_YYYYMM and TableBStaging_YYYYMM. As you can see the names of the tables will be changing each month.
The flat files will have similar naming: C:MyPathFlatFileTableAStaging__YYYYMM and C:MyPathFlatFileTableAStaging__YYYYMM.I want to run the package as an sql job in two steps, one for each table.I need to dynamically pass the table names and file names (together with the path) to the IS package.
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Oct 19, 2006
I want to pass user-defined column names to views or procedures
I am using SQL Server 2005 Express.
I tried this.
CREATE PROCEDURE @userDefinedColumn varChar(10) = 'My_Column'
select @userDefinedColumn, count(ID) as [Total Records] from My_Table
GROUP BY @userDefinedColumn
This was not accepted. It won't allow a user defined parameter in the group by.
But I need to pass user defined parameters to views as well.
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Feb 28, 2008
Can someone please help I'm writting the following query.
SELECT
(SELECT c.column_name FROM information_schema.tables T
JOIN information_schema.columns C
ON t.table_name = c.table_name
WHERE t.table_type = 'base table' and t.table_name like 'L_%' )
INTO #TempTable FROM TableA A LEFT JOIN [Server-Name].DB_Name.dbo.TableB B ON A.ID = B.ID
I'm trying to put commas between column names. How do I go about doing that?
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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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Jan 21, 2004
I'm trying to do an update query that looks like this:
UPDATE
PAEMPLOYEE
SET PAEMPLOYEE.LOCAT_CODE = EMPLOYEE.PROCESS_LEVEL
FROM
PAEMPLOYEE A
JOIN EMPLOYEE B ON A.EMPLOYEE = B.EMPLOYEE
It's erroring out on the Employee prefix B.EMPLOYEE saying:
..."does not match with a table name or alias name used in the query"
Is it wrong or will it cause problems to have a field name the same as the table name?
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Apr 10, 2008
Dear All,
We are using UnPivot task to convert the columns into rows using the Excel File as source. But the Excel file column names are changing frequenly sometimes its having only 4 columns sometimes its 10 columns.
Everytime we are checking and unchecking the column list in Unpivot Task.
can anybody help us to solve this issue that Unpivot task should take the column name dynamically.
Thanks,
Syed
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Oct 30, 2015
I got a table which gets populated by stor proc where we pivot the Sum(Balance of mortgage) by YYYYMM for the whole duration of the loan term.
I have a requirement to rename the column header where the previous month end balance period be renamed to P0.
if we run the report today, then the balance as at 31/09 should show under column P0 which now shows under 201509 and then P0 keeps shifting with each month run.
How do I dynamically rename the column headers.
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Apr 2, 2014
 I have a situation where I want to load the Excel file dynamically, and the excel file have different columns or even worksheet name. How I could approach this? I believe there's no way to modify the meta data (specifically the mapping) in the data flow.
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May 6, 2004
I'm using the code below to send files that are in a blob file in my database to the browser client. The code sends the file in chunks in order to increase performance. The file I'm using to test with is 7MB. It works great on Windows XP with any browser. It takes virtually the same amount of time compared to downloading the file directly from the webserver. However, Windows 2000 and Mac OS X both take about 4x the amount of time it takes to download the file on XP machines. Why the performance difference? Is there anything I can do to fix this? I tried downloading the file directly from the webserver instead of getting it out of the database and it takes the same amount of time on all 3 OS. I had the same problem on Windows XP when I wasn't sending the file in chunks, but after using the code below, it started working for XP only.
Dim bufferSize As Integer = 24000
Dim outbyte(bufferSize - 1) As Byte
Dim retval As Long
Dim startIndex As Long = 0
Dim sql As String = "SELECT ..."
Dim cmd As New SqlCommand(sql, conn)
conn.open()
Dim dr As SqlDataReader = cmd.ExecuteReader(CommandBehavior.SequentialAccess)
If dr.Read() Then
' Reset the starting byte for a new BLOB.
startIndex = 0
' Read bytes into outbyte() and retain the number of bytes returned.
retval = dr.GetBytes(DocCol, startIndex, outbyte, 0, bufferSize)
Current.Response.Clear()
Current.Response.Buffer = True
Current.Response.ContentType = "application/octet-stream"
Current.Response.AddHeader("Content-Disposition", "attachment; filename=" & myfile" & "." & myextension)
Do While retval = bufferSize
Current.Response.BinaryWrite(outbyte)
Current.Response.Flush()
' Reposition the start index to the end of the last buffer and fill the buffer.
startIndex += bufferSize
retval = dr.GetBytes(DocCol, startIndex, outbyte, 0, bufferSize)
Loop
'Write the remainder of the last chunk
Dim remaining(retval) As Byte
Array.Copy(outbyte, 0, remaining, 0, retval)
Current.Response.BinaryWrite(remaining)
Current.Response.Flush()
Current.Response.Close()
End If
dr.Close()
conn.Close()
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Jul 15, 2015
I have table called email_address and have all the email ids in this table. using sql task, I am getting the ids and passing to string. This string variable is passed to the to field using expression.Since it is a string only the first email id is set in the to field and the rest is ignored. Can you tell me a way to parameterize all the email ids to the to field in this case.Email ids from Table -> To field..I would like to put all the email ids in the to fields at once and send only a single email!
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Sep 14, 2015
I have a function that returns a table from a comma-delimited string.
I want to take this a step further and create a function that will return a set of tablenames in a table based on a 'group' parameter which is a simple integer...1->9, etc.Obviously, what I am doing is not working out.
CREATE FUNCTION dbo.fnReturnTablesForGroup
(
@whichgroup int
)
RETURNS @RETTAB TABLE (
TABLENAME VARCHAR(50)
[code]....
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Dec 26, 2006
Hi Everyone,I have a question about dynamically changing the length of a varchar(n)field, in case the value I'm trying to insert is too big and will givea "truncated" error, but before the error is given! i.e. Is there somekind of a way to "test" the length of the field while Inserting thevalue into it, and to have it automatically increase its length to thelength of the value being inserted, in case the value is too big?I've been able to do this in a "primitive" way, simply by identifyingthe specific error number in case the value is being truncated, andthen increasing the length of the varchar(n) field by using the ALTERcommand, and then duplicating the insert statement, but is there astandard (shorter) way of doing this?Here is my code (I'm working in an ASP environment):<%var_txt = "abcdefghijklmnopqrstuvwxyz12345678789"sql = "Insert Into Table1 (text) Values ('" & var_txt & "')"On Error Resume Nextconn.Execute sqlIf err = -2147217833 ThenResponse.Write "Error Recognized Successfully!<br /><br />"sql = "ALTER TABLE Table1 ALTER COLUMN text VARCHAR(" &Len(var_txt) &") NOT NULL"On Error Resume Nextconn.Execute sqlIf err<>0 ThenResponse.Write "Error while trying to alter Column:<br/>" & err & "= " & err.description & "<br />"ElseResponse.Write "Column altered successfully to: " &Len(var_txt) &"<br />"sql = "Insert Into Table1 (text) Values ('" & var_txt &"')"On Error Resume Nextconn.Execute sqlIf err<>0 ThenResponse.Write "<br />Error number 2:<br />" &err.description &"<br />"ElseResponse.Write "Now it was added successfully!HaHa!<br />"End IfEnd IfElseResponse.Write "Success."End If%>Thanks in advance!
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Mar 9, 2004
Is there anyway to determine what the resulting Field Names are going to be from a SQL Statement?
For example:
SELECT TABLE1.FIELD1, TABLE1.FIELD2, TABLE1.FIELD3, TABLE2.FIELD1 AS ANOTHERNAME
FROM TABLE1 INNER JOIN TABLE2 ON TABLE1.PK = TABLE2.FK
resulting field names:
FIELD1
FIELD2
FIELD3
ANOTHERNAME
Seems easy enough splitting all values before "FROM" by comma and doing some manipulation to remove table names and anything before the word "AS". However, it gets more difficult when you have complex CASE statements embedded in you query that may also contain commas.
Just a shot in the dark because I don't know if anyone has already done something like this before.
Thank you in advance,
Jeff
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Jun 1, 2005
Howdy all,I'm wishing to write a stored proc to return only the field names from a table. What I've tried gets the field names but also returns all of the data in each row. I only want the field names. Is this possible?Thanks!JP
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Jan 27, 2008
This is a followup to my last post. If a field name is changed in the database, what is the easiest way to determine what stored procedures and triggers that reference that field are now broken?
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Oct 6, 2005
Hi,We have a database with some tables with (what I woulddenote as) 'referred field names'.Like this:DataTable1 with fields F1, F2, F3DataTable2 with fields F3, F4, F5DataTable3 with fields F1, F5, F2We also have a table with field namesFieldNameTable with fields FIELD, NAMEcontaining data like:FIELD NAME----------------F1 FieldName1F2 FieldName2F3 FieldName3F4 FieldName4F5 FieldName5Now, we need a way to query the data of these tables, butthe result of the query should show the 'referred field names'from the FieldNameTable.For example, querying DataTable3 should produce the outputFieldName1 FieldName5 FieldName2------------------------------------------... ... ...... ... ...Any idea how (and whether) this can be done with an SQL query?Thanks in advance for tips & tricks.Dirk Vdm
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Jan 15, 2004
I can't seem to find a sample code, either here or on the net - - so I'll go ahead and ask...
What I'm looking for is a sample of how to query a database, so that I can populate a listbox with the table names from a database - - and then, populate another listobx with the field names from the database, in order to build a user-driven sql statement builder....
either of the above (at least the field name part) - either a code sample, or a link, will be greatly appreciated) - -
Thanks
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Nov 14, 2001
I need a statement or sp that will display, for a given user database, an individual table's fieldnames, datatype, and length. Any help is appreciated.
Randy
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Nov 20, 2006
Hello All,
I have the following code:
USE MLS
select sc.name,f.field#,fdesc,flong
from sysobjects so join syscolumns sc
on so.id = sc.id
join fld f
on f.field# = replace(sc.name,'_','')
where so.name = 'dbo.tbl_MLS_Leads_Trans'
I am trying to get the description which is flong and I get the following error message:
Msg 208, Level 16, State 1, Line 2
Invalid object name 'fld'.
What am I doing wrong?
TIA
Kurt
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Mar 15, 2008
Can someone write a query that select all the fields of tables in database that have type 'image'?
Something like this:
Select TableName, FieldName FROM TableWhereTheyKeepThoseThings
WHERE TableWhereTheyKeepThoseThings.FieldType='Image'
... olny it should work :)
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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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Apr 26, 2006
Hi,
is there any "robust" way to find out the name of a field in the pipeline by it's Lineage ID programatically? There is a sample code out there (on one of the blogs) but it seams not to be reliable...
The usecase is easy... What is the field name in an error output of that column that causes the error? We don't want to have hardcoded LineageIDs in the error handling so I think it's the best idea to go with field names... However we only get that LineageID...
Thanks,
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Sep 11, 2006
Hi,
How canI get all field names in a table using sql query? Now I am not interested in the data in this table, what I am interested in is just the schema, i.e. all field names. Thanks.
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Dec 19, 2007
While creating a view in SQl Server 2005 Management Studio Or Interation Services on a SQL Server 2000 database using "*" something very strange happens. Has anyone every seen this happen before?
The new view is created something like the following:
CREATE VIEW [dbo].[new_view]
AS
SELECT *
FROM Table1
GO
However, when right-clicking on the new view, and choosing "Design", the SELECT scrambles the field names with aliases of the other field names. When the view is run, the result set is incorrect. It may look something like the following:
SELECT
Field1,
Field2 AS Field3,
Field3 AS Field4,
Field4 AS Field5,
.
.
.
From Table1
GO
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Oct 10, 2007
I am having two datasets in the same report, the column names are the same, in both the datasets, Now How can I use the individual fields in same report.
If I use (Fields!xyz.Value, "dsDataSet1") and (Fields!xyz.Value, "dsDataSet2")
It is giving me syntax error.
How can I use both these fieds, I do not want any aggregates
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Aug 9, 2004
Hello All,
I have been trying to get this code work, but I could not. Every thing seems going well. However, The result of running the sql query is strange. It shows the field names twice.
Eg:) if you have a table called "newtable" that has two fields[Custnumber, Custname], you will get somthing like this [Custnumber, Custname Custnumber, Custname]. I have tried many times, but I couldn't fix it.
Sub Page_Load(sender As Object, e As EventArgs) handles Mybase.Load
if not page.Ispostback then
try
Sqlconnection = New Sqlconnection (connectionString)
querystring = "SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNs
WHERE TABLE_NAME = 'Newtable'"
SqlCommand = New SqlCommand(queryString, Sqlconnection)
SqlConnection.Open
dataReader = SqlCommand.ExecuteReader(CommandBehavior.CloseConnection)
while dataReader.Read()
Tablefields_txt.text += dataReader.Getstring(0) & ", "
End while
catch ex as Exception
msgbox("An error has occured: " + ex.Message,0, "Error Message")
finally
SqlConnection.Close()
End try
End if
Any help , please
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Jun 8, 2005
I am in a situation where I need to find out unique field names with different values in a table having 200+ columns.
Let's say I have two rows with 200+ columns ( I exported these rows from Lotus Notes to SQL Server) I am not sure what columns makes unique of these rows. It's going to be tedious by checking each column values.
Is there anyway I can write a squl query on these two rows which outputs column names which are having unique values.
I would appreciate If anybody gives me hint about achieving desired result
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Nov 23, 2004
for debug purposes i tried to copy paste some Query Analyser output into Excel... the data pastes fine, but i can't get the field-names to copy/paste. is there a trick? izy
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Jun 30, 2006
CREATE PROCEDURE [dbo].[removeContact]
@RemoveType VARCHAR (50),
@ListID INT,
@TargetField VARCHAR (50),
@TargetValue VARCHAR (150),
@RowsAffected INT OUTPUT
AS
UPDATE [tblContacts]
SET @RemoveType = 'yes'
WHERE [list_id]=@ListID
AND @TargetField = @TargetValue
SELECT @RowsAffected = @@ROWCOUNT
GO
declare @P1 int
set @P1=0
exec removeContact '[unsubscribe]', 6, '[email]', 'email@domain.com', @P1 output
select @P1
I've tried this with and without the square brackets. Either way, nothing gets updated. Am I barking up the wrong tree?
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May 23, 2007
Why is it that when you change a field name is SQL Server it sometimes completely messes things up. I renamed a field in one of my tables from Emp# to EmpNumber. I had a view based on this table and naturally I knew I would have to change a view I had based on the table. I opened the view and changed the field from Emp# to EmpNumber but when I tried to open the view I got an error “Invalid column Name EMP#”. I have not been able to fix this. I have dropped and recreated the view, refreshed all the objects using enterprise manager, refreshed all the objects using Query Analyzer, shut down and restarted my computer, taken my database offline and put it back on line. The field name EMP# is not in any tables in my database and not referenced any views or procs . I am just starting on this database so I could verify this very easily because I only have a few views and procs.
Has anyone had this problem or more importantly does anyone know why this is happening or how to fix it?
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Jan 24, 2007
I do a SELECT * from table command in an ASP page to build a text fileout on our server, but the export is not to allow a field name rows ofrecords. The first thing I get is a row with all the field names. Whydo these come in if they are not part of the table records? How do Ieliminate this from being produced? Here's the ASP code....<html><head><title>Package Tracking Results - Client Feed</title></head><body><%' define variablesdim oConn ' ADO Connectiondim oRSc ' ADO Recordset - Courier tabledim cSQLstr ' SQL string - Courier tabledim oRSn ' ADO Recordset - NAN tabledim nSQLstr ' SQL string - NAN tabledim objFSO ' FSO Connectiondim objTextFile ' Text File' set and define FSO connection and text file object locationSet objFSO = CreateObject("Scripting.FileSystemObject")'Set objTextFile =objFSO.CreateTextFile(Server.MapPath("textfile.txt"))'Response.Write (Server.MapPath("textfile.txt") & "<br />")Set objTextFile = objFSO.OpenTextFile("C: extfile.txt",2)' write text to text file'objTextFile.WriteLine "This text is in the file ""textfile.txt""!"' SQL strings for Courier and NAN tablescSQLstr = "SELECT * FROM Courier"' set and open ADO connection & oRSc recordsetsset oConn=Server.CreateObject("ADODB.connection")oConn.Open "DRIVER={Microsoft Access Driver (*.mdb)};DBQ=" &"c:/Database/QaTracking/QaTracking.mdb" & ";"set oRSc=Server.CreateObject("ADODB.Recordset")oRSc.Open cSQLstr, oConnResponse.ContentType = "text/plain"Dim i, j, tmpIf Not oRSc.EOF ThenFor i = 1 To oRSc.Fields.CountobjTextFile.Write oRSc.Fields(i-1).NameIf i < oRSc.Fields.Count ThenobjTextFile.Write " "End IfNextobjTextFile.WriteLineWhile Not oRSc.EOFFor i = 1 To oRSc.Fields.CountIf oRSc.Fields(i-1) <"" Thentmp = oRSc.Fields(i-1)' If TypeName(tmp) = "String" Then' objTextFile.Write "" &_'Replace(oRSc.Fields(i-1),vbCrLf,"") & ""' ElseobjTextFile.Write oRSc.Fields(i-1)' End IfEnd IfIf i < oRSc.Fields.Count ThenobjTextFile.Write " "End IfNextobjTextFile.WriteLineoRSc.MoveNextWendEnd IfobjTextFile.CloseSet objTextFile = NothingSet objFSO = NothingoRSc.CloseSet oRSc = NothingoConn.CloseSet oConn = Nothing%></body></html>
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Jul 20, 2005
I have a .NET program that can connect to either an Access 97 database or anSQL Server 7 database. In the database I have two tables which have a fieldcalled ID. When I run a query like "SELECT A.*, B.* FROM A, B", the queryreturns those fields as "A.ID" and "B.ID" when connected to Access 97, butas "ID" and "ID" in SQL Server 7. Is there anyway to get SQL Server toprepend the table name to the field name in a case like this and not returnduplicate field names like that without having to specify aliases for thefields?- Don
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