How To Handle N-columns In A Table?
Sep 27, 2007
Hi there,
I am trying to create an application that requires n number of columns in table on run time. For example, I want to create a table of products and its properties. For that, I can use master and detail tables, but my problem starts when I get different number of characteristics for different products. Lets say, I have a product that has some colour and size, but for another product, I need expiry date as well and it continues like this. Now I want to know, what I can do to handle this problem. Please help me in this.
Best Regards,
Asif Hameed
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Mar 7, 2008
What are the maximum columns that SQL can handle?
If I use a table that has about 300 columns and 100,000 records for a web application, Is it going to cause a performance problem?
Have anyone experience in using the size of table like this on web application?
Thank you,
Vi
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Oct 27, 2007
Hello
I have this newbie question regarding SSIS:
I have a table named People(#Code, Name, eMailList), where the column eMailList has a list of email addresses separated by commas, like "someone@hotmail.com,someone@gmail.com,someone@yahoo.com".
I would like that for each Person, extract the email address info in such a way that I can insert into the following table: EMail(#Code, #ID, Address), where Address has a single email address.
How can I accomplish that?
Thanks a lot.
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Oct 27, 2007
Hello
I have this newbie question regarding SSIS:
I have a table named People(#Code, Name, eMailList), where the column eMailList has a list of email addresses separated by commas, like "someone@hotmail.com,someone@gmail.com,someone@yaho o.com".
I would like that for each Person, extract the email address info in such a way that I can insert into the following table: EMail(#Code, #ID, Address), where Address has a single email address.
How can I accomplish that?
Thanks a lot.
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Jun 29, 2015
I have a scenario where we have to handle dynamically changing source columns.
For example , some times in the source files the number of columns will be increased or decreased, new columns can be added in the middle or in the end of the source file.
How to handle this kind of scenario in the SSIS ?
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Jul 22, 2015
So I have been trying to get mySQL query to work for a large database that I have. I have (lets say) two tables Table_One and Table_Two. Table_One has three columns: Type, Animal and TestID and Table_Two has 2 columns Test_Name and Test_ID. Example with values is below:
**TABLE_ONE**
Type Animal TestID
-----------------------------------------
Mammal Goat 1
Fish Cod 1
Bird Chicken 1
Reptile Snake 1
Bird Crow 2
Mammal Cow 2
Bird Ostrich 3
**Table_Two**
Test_name TestID
-------------------------
Test_1 1
Test_1 1
Test_1 1
Test_1 1
Test_2 2
Test_2 2
Test_3 3
In Table_One all types come under one column and the values of all Types (Mammal, Fish, Bird, Reptile) come under another column (Animals). Table_One and Two can be linked by Test_ID
I am trying to create a table such as shown below:
Test_Name Bird Reptile Mammal Fish
-----------------------------------------------------------------
Test_1 Chicken Snake Goat Cod
Test_2 Crow Cow
Test_3 Ostrich
This should be my final table. The approach I am currently using is to make multiple instances of Table_One and using joins to form this final table. So the column Bird, Reptile, Mammal and Fish all come from a different copy of Table_one.
For e.g
Select
Test_Name AS 'Test_Name',
Table_Bird.Animal AS 'Birds',
Table_Mammal.Animal AS 'Mammal',
Table_Reptile.Animal AS 'Reptile,
Table_Fish.Animal AS 'Fish'
From Table_One
[Code] .....
The problem with this query is it only works when all entries for Birds, Mammals, Reptiles and Fish have some value. If one field is empty as for Test_Two or Test_Three, it doesn't return that record. I used Or instead of And in the WHERE clause but that didn't work as well.
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Sep 20, 2006
I have a sp that will do two select from two table. now, can datareader read both table or only dataset can? if datareader can? how to handle it?
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Feb 4, 2008
Hello friends
I am new to SQL database design.I am having a table name customerletter_master in which all details of customer letters are saved.At a time i.e in single second around 200- 400 entry are made in customerletter_master table. Hits to customerletter_master table are more.
Following fields are used in customerletter_master – CID (autogen number), letterno(primary key),consignee, consignor, letterstatus1, letterstatus2, letterstatus3, POD, and some more fields. When letter passes to different stages letterstatus1 is filled to yes and then letterstatus2 and letterstatus3 are filled according to passage of letter.
And at same time many user can accesses the customerletter_master table to search any letter according to letterno. Therefore customerletter_master is used to enter data and to search data at same time and there can be more than 200-400 users doing add and search records to and from customerletter_master
how should i design this table. What should i use to enter and search record and minimize the table hits made by the user at same time. Should i use store procedures or any other method to add and search record. Plz help me out by giving some example.
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Jan 23, 2008
Hi,
I'm only new to Reporting services and have just started working on a report model for ad hoc reporting.
I have around 50 tables, many of them related through FK's. How can I handle this when designing the model?
E.G
I have a Table called Posts, which has a Hospital ID which is an FK to the Hospitals table. A relationship exists between the two in my Data Source View, however I cannot access the Hospital Name (stored in the Hospital table) using the report builder.
I'd greatly appreciate any help you can give.
Thanks,
John
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Jan 2, 2014
We are designing a Staging layer to handle incremental load. I want to start with a simple scenario to design the staging.
In the source database There are two tables ex, tbl_Department, tbl_Employee. Both this table is loading a single table at destination database ex, tbl_EmployeRecord.
The query which is loading tbl_EmployeRecord is, SELECT EMPID,EMPNAME,DEPTNAME FROM tbl_Department D INNER JOIN tbl_Employee E ON D.DEPARTMENTID=E.DEPARTMENTID.
Now, we need to identify incremental load in tbl_Department, tbl_Employee and store it in staging and load only the incremental load to the destination.
The columns of the tables are,
tbl_Department : DEPARTMENTID,DEPTNAME
tbl_Employee : EMPID,EMPNAME,DEPARTMENTID
tbl_EmployeRecord : EMPID,EMPNAME,DEPTNAME
How to design the staging for this to handle Insert, Update and Delete.
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Feb 8, 2008
Hi,
I have implemented Remus Resanu's implementation from the Recycling Conversations article and I am experiencing locking issue when I try to insert new conversation handles to the SessionConversations table. I have copied the code in the article exactly including the activation procedure. Any ideas why I may be locking. I am thinking it is related to the HOLDLOCK hint on the table.
The sepcific line where I see locking is directly from the article:
INSERT INTO [SessionConversations] (SPID, FromService, ToService, OnContract, Handle) VALUES (...etc)
Thanks
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Sep 19, 2007
Hi,
I have two tables
Table Source
{
category varchar(20),
LastUpdate datetime
}
Table Destination
{
SubjectId varchar(20),
SubjectDate datetime,
category varchar(20),
LastUpdate datetime
}
Please note that the number columns are different in each table.
I wanted to dump the data of Source table to Destination table. I meant to say that the rows of 2 columns in Source table to last 2 rows of Destination table.
And also my oreder of the columns in Destination table will vary. So i need to a way to dynamically insert the data in bulk. but i will know the column names for sure before inserting.
Is there anyway to bulk insert into these columns.
Your quick response will be appreciated
~Mohan Babu
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Apr 29, 2015
I have a business need to create a report by query data from a MS SQL 2008 database and display the result to the users on a web page. The report initially has 6 columns of data and 2 out of 6 have JSON data so the users request to have those 2 JSON columns parse into 15 additional columns (first JSON column has 8 key/value pairs and the second JSON column has 7 key/value pairs). Here what I have done so far:
I found a table value function (fnSplitJson2) from this link [URL]. Using this function I can parse a column of JSON data into a table. So when I use the function above against the first column (with JSON data) in my query (with CROSS APPLY) I got the right data back the but I got 8 additional rows of each of the row in my table. The reason for this side effect is because the function returned a table of 8 row (8 key/value pairs) for each json string data that it parsed.
1. First question: How do I modify my current query (see below) so that for each row in my table i got back one row with 19 columns.
SELECT A.ITEM1,A.ITEM2,A.ITEM3,A.ITEM4, B.*
FROM PRODUCT A
CROSS APPLY fnSplitJson2(A.ITEM5,NULL) B
If updated my query (see below) and call the function twice within the CROSS APPLY clause I got this error: "The multi-part identifier "A.ITEM6" could be be bound.
2. My second question: How to i get around this error?
SELECT A.ITEM1,A.ITEM2,A.ITEM3,A.ITEM4, B.*, C.*
FROM PRODUCT A
CROSS APPLY fnSplitJson2(A.ITEM5,NULL) B, fnSplitJson2(A.ITEM6,NULL) C
I am using Microsoft SQL Server 2008 R2 version. Windows 7 desktop.
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May 26, 2015
Here is My requirement, I'm not sure if this is possible. Creating table called master like col1, col2 col3, col4 , col5 ...Where Col1, col2 are updatable - this can be done easily
Col3, col4 are columns in another table but these can be just a read only ?? Is this possible ? this is possible with View but not friendly with share point CRUD...Col 5 is a computed column of col 2 and col5 ? if above step can be done then sure this can be done I guess.
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Dec 3, 2007
Hi
I'm using service broker and keep getting errors in the log even though everythig is working as expected
SQL Server 2005
Two databases
Two end points - 1 in each database
Two stored procedures:
SP1 is activated when a message enters the sending queue. it insert a new row in a table
SP2 is activated when a response is sent from the receiving queue. it cleans up the sending queue.
I have a table with an update trigger
In that trigger, if the updted row meets a certain condition a dialogue is created and a message is sent to the sending queue.
I know that SP1 and SP2 are behaving properly because i get the expected result.
Sp1 is inserteding the expected data in the table
SP2 is cleaning up the sending queue.
In the Sql Server log however i'm getting errors on both of the stored procs.
error #1
The activated proc <SP 1 Name> running on queue Applications.dbo.ffreceiverQueue output the following: 'The conversation handle is missing. Specify a conversation handle.'
error #2
The activated proc <SP 2 Name> running on queue ADAPT_APP.dbo.ffsenderQueue output the following: 'The conversation handle is missing. Specify a conversation handle.'
I would appreceiate anybody's help into why i'm getting this. have i set up the stored procs in correctly?
i can provide code of the stored procs if that helps.
thanks.
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Jul 20, 2005
Hello,Using SQL Server 2000, I'm trying to put together a query that willtell me the following information about a view:The View NameThe names of the View's columnsThe names of the source tables used in the viewThe names of the columns that are used from the source tablesBorrowing code from the VIEW_COLUMN_USAGE view, I've got the codebelow, which gives me the View Name, Source Table Name, and SourceColumn Name. And I can easily enough get the View columns from thesyscolumns table. The problem is that I haven't figured out how tolink a source column name to a view column name. Any help would beappreciated.Garyselectv_obj.name as ViewName,t_obj.name as SourceTable,t_col.name as SourceColumnfromsysobjects t_obj,sysobjects v_obj,sysdepends dep,syscolumns t_colwherev_obj.xtype = 'V'and dep.id = v_obj.idand dep.depid = t_obj.idand t_obj.id = t_col.idand dep.depnumber = t_col.colidorder byv_obj.name,t_obj.name,t_col.name
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Jan 18, 2008
We have implemented our service broker architecture using conversation handle reuse per MS/Remus's recommendations. We have all of the sudden started receiving the conversation handle not found errors in the sql log every hour or so (which makes perfect sense considering the dialog timer is set for 1 hour). My question is...is this expected behavior when you have employed conversation recycling? Should you expect to see these messages pop up every hour, but the logic in the queuing proc says to retry after deleting from your conversation handle table so the messages is enqueued as expected?
Second question...i think i know why we were not receiving these errors before and wanted to confirm this theory as well. In the queuing proc I was not initializing the variable @Counter to 0 so when it came down to the retry logic it could not add 1 to null so was never entering that part of the code...I am guessing with this set up it would actually output the error to the application calling the queueing proc and NOT into the SQL error logs...is this a correct assumption?
I have attached an example of one of the queuing procs below:
Code Block
DECLARE @conversationHandle UNIQUEIDENTIFIER,
@err int,
@counter int,
@DialogTimeOut int,
@Message nvarchar(max),
@SendType int,
@ConversationID uniqueidentifier
select @Counter = 0 -- THIS PART VERY IMPORTANT LOL :)
select @DialogTimeOut = Value
from dbo.tConfiguration with (nolock)
where keyvalue = 'ConversationEndpoints' and subvalue = 'DeleteAfterSec'
WHILE (1=1)
BEGIN
-- Lookup the current SPIDs handle
SELECT @conversationHandle = [handle] FROM tConversationSPID with (nolock)
WHERE spid = @@SPID and messagetype = 'TestQueueMsg';
IF @conversationHandle IS NULL
BEGIN
BEGIN DIALOG CONVERSATION @conversationHandle
FROM SERVICE [InitiatorQueue_SER]
TO SERVICE 'ReceiveTestQueue_SER'
ON CONTRACT [TestQueueMsg_CON]
WITH ENCRYPTION = OFF;
BEGIN CONVERSATION TIMER ( @conversationHandle )
TIMEOUT = @DialogTimeOut
-- insert the conversation in the association table
INSERT INTO tConversationSPID
([spid], MessageType,[handle])
VALUES
(@@SPID, 'TestQueueMsg', @conversationHandle);
SEND ON CONVERSATION @conversationHandle
MESSAGE TYPE [TestQueueMsg] (@Message)
END
ELSE IF @conversationHandle IS NOT NULL
BEGIN
SEND ON CONVERSATION @conversationHandle
MESSAGE TYPE [TestQueueMsg] (@Message)
END
SELECT @err = @@ERROR;
-- if succeeded, exit the loop now
IF (@err = 0)
BREAK;
SELECT @counter = @counter + 1;
IF @counter > 10
BEGIN
-- Refer to http://msdn2.microsoft.com/en-us/library/ms164086.aspx for severity levels
EXEC spLogMessageQueue 20002, 8, 'Failed to SEND on a conversation for more than 10 times. Error %i.'
BREAK;
END
-- We tried on the said conversation, but failed
-- remove the record from the association table, then
-- let the loop try again
DELETE FROM tConversationSPID
WHERE [spid] = @@SPID;
SELECT @conversationHandle = NULL;
END;
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Apr 4, 2008
I'm in the process of converting legacy DTS packages to SSIS. I need to populate a table that has more fields than the source file. In DTS I did this with an ActiveX script. How do I go about doing this within SSIS.
In the ActiveX script most of the fields were defaulted with either spaces or zeroes.
One of the Destination fields needs to be incremented by 1 for each new record inserted.
Any help would be appreciated.
Thanks,
Jeff
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Dec 23, 2013
I just created a new table with over 100 Columns and I need to populated just the first 2 columns.
The first columns to populate is an identify column that is the primary key. The second column is a foreign_key to an other column and I am trying to populate this columns with all the values from the foreign_key value. This is what I am trying to do.
column1 = ID
column2= P_CLIENT_D
SET IDENTITY_INSERT PIM1 ON
INSERT INTO PIM1 (P_CLIENT_ID)
SELECT
Client.ID
FROMP_Client
So I am trying to insert both an identity values and a value from an other table while leaving the other columns blank. How do I go about doing this.
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May 4, 2006
Hello,I have a query that I need help with.there are two tables...Product- ProductId- Property1- Property2- Property3PropertyType- PropertyTypeId- PropertyTypeThere many columns in (Product) that reverence 1 lookup table (PropertyType)In the table Product, the columns Property1, Property2, Property3 all contain a numerical value that references PropertyType.PropertyTypeIdHow do I select a Product so I get all rows from Product and also the PropertyType that corresponds to the Product.Property1, Product.Property2, and Product.Property3ProductId | Property1 | Property2 | Property3 | PropertyType1 | PropertyType2 | PropertyType3 PropertyType(1) = PropertyType for Property1PropertyType(2) = PropertyType for Property2PropertyType(3) = PropertyType for Property3I hope this makes sence.Thanks in advance.
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Jan 20, 2014
I have two tables with the common column-name/ The first one include such columns as the name of football team, its country and budget. The second one include the team name, victories (quantity of it), lost games, and season. So I have the task to select such column as name, victories, lost games in 2nd table but only that ones that has budget over 1 mln? How to build select statement SELECT name, victories, lost g/ from TABLE2 WHERE budget >1000000 from TABLE1? Or should I equates the table1.name=table2.name??
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Feb 12, 2007
mahesh writes "HI,
I am new to sql server.
can anybody help me
I have a table named tblqualificationmaster.
can i know the foreignkeys and the table related to this
tblqualificationmaster having foeign keys using stored procedure."
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Dec 13, 2007
Hello:
I am running into an issue with RS2k PDF export.
Case: Exporting Report to PDF/Printing/TIFF
Report: Contains 1 table with 19 Columns. 1 column is static, the other 18 are visible at the users descretion. Report when printed/exported to pdf spans 2 pages naturally, 16 on the first page, 3 on the second, and the column widths have been adjusted to provide a perfect page span .
User A elects to hide two of the columns, and show the rest. The report complies and the viewable version is perfect, the excel export is perfect.. the PDF export on the first page causes every fith column, starting with the last column that was hidden to be expanded to take up additional width. On the spanned page, it renders the first column on that page correctly, then there is a white space gap equal to the width of the hidden columns and then the rest of the cells show with the last column expanded to take up the same width that the original 2 columns were going to take up, plus its width.
We have tried several different settings to see if it helps this issue or makes it worse. So far cangrow/canshrink/keep together have made no impact. It is not possible to increase the page size due to limited page size selection availablility for the client. There are far too many combinations of what the user can elect to show or hide to put together different tables to show and hide on the same report to remove this effect.
Any help or suggestion on this issue would be appreciated
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Mar 20, 2006
I have a table A, with two ID columns. In a report both ID colums shouldbe shown with the actual value stored in a second table, BThe problem is, both IDs need to be looked up in B, but are not in thesame row.How do I do this in an efficient way? A sub select?Thanks,--John MexIT: http://johnbokma.com/mexit/personal page: http://johnbokma.com/Experienced programmer available: http://castleamber.com/Happy Customers: http://castleamber.com/testimonials.html
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Feb 5, 2007
I have two tables:
Orders, with OrderID as primary key, a code for the client, and a code for the place of delivery/receipant.
Both the client and place of delivery should be linked to the table:
Relations, where each relation has it's own PrimaryID which is a auto-numbered ID. Now I want to substract my orders, with both the clientcode, and the place of delivery code linked to the relations table, so that for both the name and adress is shown.
I can link one of them by:
InnerJoin On Orders.ClientID = Relations.ClientID, but it's not possible to also link to the ReceipantsID. Is there a way to solve this?
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Oct 26, 2015
Say you have a fact table with a few columns that all reference the same key column in a dimension table, you want to write a view to return the information for those keys?
USE MyTestDB;
GO
SET NOCOUNT ON;
IF OBJECT_ID ('dbo.FactTemp' ,'U') IS NOT NULL
DROP TABLE dbo.FactTemp;
[Code] ....
I'm using very small data at the moment, and the query plan and statistics don't really say which way.
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Jul 19, 1999
What is the easiest way to determine the number of columns in a table (in a particular database)? Also is there any way to get the column id associated with each column (is there such thing)??
NOTE, this needs to be done with only knowing the name of the table and database and nothing else.
All help is greatly appreciated.
Thanks in advance.
ziggy
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Sep 13, 1999
I need to find out the number of columns per table for ALL of my tables in
my database. This way I can compare my old copy of the database to the new and make sure that any new columns are there.
Thank you,
Tracy Young
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May 12, 2008
Hi,
I have a table (that i get as a result of pivots and joins in a stored procedure) that has two columns with the same name, (each time the stored procedure is called, different columns will be in this situation). For every row, only one of these columns has a value and the other has NULL.
Does anyone know how to do prevent this situation during the JOIN that creates this table? OR of a way to merge these columns once they are there ?
Thanks !!
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Oct 15, 2007
i have a table with 6 million rowwhat is the affect of increasing a varchar(255) columnto varchar(500)tiaMJ
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Nov 27, 2007
HI,
I have a procedure when i need to get the columns of a table and store them in a temp table and process further.
For this i am planning to use sys.columns table as follows:
SELECT OBJECT_name(c.object_id) TableName, c.name ColumnName
FROM sys.columns AS c
Can I use this table in a procedure? Do I need to have any permissions to use this table?
If so, is there any alternative to get the columns of a table so that I wont use sys.columns table.
Please advice on this
Thanks in advance
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Feb 18, 2007
Hi, I have 3 tables which are part of my query and I need to total one column from each of them, but cannot get it to work. I had this working within Access using the nz function (below), but when trying to use this within VS to produce my ASP.net code did not work, saying NZ was not a valid function. nz(HW.HGF)+nz(HD.HGF)+nz(HL.HGF) AS FWhere HW,HD,HL are the table names and HGF is the same column name in each which I want to total.Any help would be grately appreciated.Thanks
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Apr 8, 2008
I have a 2 columns ID and DriverID.I need ID and DriverID column's in such a way that
what are the settings should be set?
ID DriverID
1 0001
2 0002
3 0003
4 0004
....
999 000999
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