Max no of columns
Hi,
What is maximum no of column in Oracle 8i.
Thanks,
Kumar.
The maximum no. of columns allowed for a table or view is 1000 only in Oracle 8i(8.1.7).
Sunil.
Similar Messages
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At max how many columns is advisable to create in a table/view
Hi All,
I have two transaction table from which i want to create a simple view or materialized view. But the number of columns is about 200. So i want to know at max how many columns is advisable from the performance point of view.
Even though i will create 200 columns in a view , for a perticular client installation i may not use all the columns.
one more thing i will never use 200 columns in the select statement . At a time i will use only 4/5 columns.
It may happen from this four column one column will be the 1st and 2nd column will be the 200th one.
I want to know how it affects the performance and in which scenario . Please help if any body knows or already faced this kind of scenario.
I am using oracle 10g .Annapurna Nayak wrote:
thanks for ur reply .
We are going to use this view in a report , so if i will create it as simple view it will affect report performance. because the view script is too long ...so every time quring to a view will decrease the performance.
Are you asking me if it will? I think it probably won't but of course you have the means to test it to be sure, right?
As u said MV should be done with minimum possible column . what can be the maximum column in MV ..??It would be defined by the limits on:
* The maximum number of columns that a table can contain
* The size of the query needed to define the select statement
* Limitations on queries needed to maintain the data
http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/limits003.htm#i288032 -
Max number of columns in a Webi report
In a worst-case scenario test, I requested about 1700 columns in a Webi report, but only a little more than 300 appeared in the SQL; a TOAD request for the same 1700 columns was successful. Is there an upper limit for the number of objects that can appear in a Webi report? Is there a parameter that could increase the limit?
My eyes read the first half and my brian assumed the second half.
I dont think there is a limitaion on the number of objects that a WebI report can pull.
The only limitation I know of is the maximum number of column that you can display in the report panel; the max number is 100,000.
With the limit on the max number of column diplay in a WebI report can be translated into the max number of columns in the query panel.
This setting is in CMC> Applications>Web Intelligence-->Quick Display mode -
Max No. of columns returned in Query Template
Hi All,
Is there any limit to the max number of columns that can be returned for a sql query using the Query Template?
Regards,
ArijeetHi Rick,
I am basically querying a database table which has a large number of columns. Of which I need only a few. Unfortunately though some of the columns I need are not in those that are shown by default when I do a SELECT * or in the list of columns that show up in the Query Template. I am using UDS to connect to the other system and when I try to SELECT the columns which are of interest to me the connection is reset and the UDS Instance for that connection stops. I could access all the columns in the BLS so I am presently using a work around by running an xacute query to show me the data.
Regards,
Arijeet -
Planning Layout error K9162 - max number of columns in planning layout rest
Hello collegues,
our client would like to have 34 columns in planning layout costs activity inputs of TA KP67. But error message K9162 - max. number of columns is restricted to 30. So I tried to switch of the message with TA OBA5 application area K9 - msg number 162. But this does not work as the error comes up again even though the message is switched off.
Do you have some ideas?
Thanks and regards,
ChristianHello,
thanks for your response. I have maintaine in OBMSG:
K9 162 WE E switch off selected
then in OBA5 for dialog and batch I have maintained -
but the error is upcoming again. So I think that this sort of message cannot be switched off as the planning layout is restricted to 30 columns by design maybe?
thanks and regards,
Christian -
What's the max number of columns a table can have on 32 bit OS & 64 bit OS
What is the max number of columns a table can have on 32 bit OS & 64 bit OS ?
Edited by: sameer naik on 02-Jul-2010 02:11For TimesTen 7.0 and 11.2.1 releases the limit on the number of columns per table is 1000 for both 32 and 64 bit TimesTen. This can be found in the documentation under System Limits.
Regards,
Chris -
Teststand SQL reuest get MAX of a Column
Spoiler (Highlight to read)
Hello,
In Teststand 3.1, I try to get the MAX of a column called Col1 in the table myTAB.
To do that; I have writen in the Open Statement the following request
SELECT MAX(myTAB.Col1) FROM myTAB" Thanks. Correct execution in teststand
Question : How do I get the result with the SQL Action Step
Thank you by advance for your help
Solved!
Go to Solution.Hello Rodéric,
Thank you very much for the answer.
I tried your suggestion as it is but unfortunatelly Teststand gives back an error because it can't manage correctly the locals.max in the request.
However I tried other may your idea of using the key word "as" :
First I use :
Open Statement : SELECT MAX(myTAB.Col1) as MAXI FROM myTAB
I don't know how teststand manage the "variable" MAXI.
But when I secondly add the step
SQL Action : Get - Retrive Values from record with as Column/Parameter Values:
Name/Number : "MAXI"
Values : Locals.Max
It works correctly
Thank you a lot
Ham -
Max number of columns in table for compression
i was told that 256 columns is the max number in a single table for oracle to do compression on table. Can anyone confirm this ?
I can't confirm it off the top of my head but if it is the case then it is documented at http://tahiti.oracle.com you can look it up yourself.
What I do want to weigh in on is the insanity of a table with more than 256 columns. I consider any table with more than 50 columns suspect, more than 100 likely a strong indication that someone understands little about normalization. Anyone contemplating 255+ columns should have their fingers removed from their keyboard by force if necessary. -
Finding max value in column using java..
Hello there!!
I have a problem that i tried finding in google but did not get what i wanted.. that's why i hope you guys could help me out.
How do i find the maximum value in a column using resultset..
for example..
Connection con = DriverManager.getConnection("jdbc:mysql:///eproc","root", "");//eproc is dbase name in MySQL
Statement stmt=con.createStatement();
ResultSet rs;
rs = stmt.executeQuery("SELECT MAX(id) FROM cat_work_sor_category");now, how do i use resultset to make sure i get the max value and assign to integer variable...
Please do help me out.
Thankyou.Connection con =
DriverManager.getConnection("jdbc:mysql:///eproc","roo
t", "");//eproc is dbase name in MySQL
Statement stmt=con.createStatement();
ResultSet rs;
rs = stmt.executeQuery("SELECT MAX(id) FROM
cat_work_sor_category");
Integer MaxValue = new Integer(-1);
if(rs.next()){
MaxValue = rs.getInt(1);
int MAX_VALUE = MaxValue.intValue(); -
Database best practice: max number of columns
I have two questions that I would appreciate comments on...
We have a table titled TRANSACTION with 160 columns and a view titled TRANSACTIONS_VIEW with 233 columns in it. This was designed by someone a while ago. I am wondering if it is against best practice to have this many columns in a table? I have never before seen a table with this many columns in it and feel that there must be a way to split the data into multiple tables to make it more manageable.
My second question is on partitions, the above table TRANSACTION is partitioned by manually specifying partitions with max values on the transaction date starting august 2008 through january 2010 at 1 month increments. Isn't it much better to specify automatic partitioning using the interval clause?kev374 wrote:
thanks for the response, yes there are many columns that violate 3NF and that is why the column count is so high.
Regarding the partition question, by better I meant by using "interval" the partitions could be created automatically at the specified interval instead of having to create them manually.The key is to understand the logic behind these tables and columns. Why it was designed like this, if it's business requirement then 200 some columns are not bad, if it's design flaw 20 columns could be too much. It's not necessarily always good to have strict 3NF design, sometime for various reason you can denormalize the tables to get better performance.
As to partitioning Q, you have to do the rolling window (drop/add partition as time goes by) type of partitioning scheme manually so far. -
Hi Friends,
How can I find the table with maximum number of columns in the database 10g? Please help...
ThanksFor a particule schema/user, table(owned by user) with max columns:
SELECT TABLE_NAME FROM USER_TAB_COLS
WHERE COLUMN_ID = (SELECT MAX(COLUMN_ID) FROM USER_TAB_COLS)
--There can be multiple tables having same max columns
For a particular user/Schema, table with max columns ( tables owned by other users but user is having acces/grants to the table)
SELECT OWNER, TABLE_NAME FROM ALL_TAB_COLS
WHERE COLUMN_ID = (SELECT MAX(COLUMN_ID) FROM ALL_TAB_COLS)
--There can be multiple tables having same max columns
table with max columns in DB -
SELECT OWNER, TABLE_NAME FROM DBA_TAB_COLS
WHERE COLUMN_ID = (SELECT MAX(COLUMN_ID) FROM DBA_TAB_COLS)
--There can be multiple tables having same max columns
--This may include table in sys or other schemas as well
HTH,
~Yogesh -
Report: max/avg of column. Display-question
Hi all,
In my application there is a sql query-report. The sql query is dynamic so the user of my application can change what column should be displayed and what filter should be used. Now I want to add an avg/max function to arrange the data of the table a littlebit more clearly and the user should decide what/howmuch columns should be used for the average/max calculation.
My question is:
I want to show the value of the calculation in an extra field right under the corresponding column. Is there a way to show the value in one field without add a whole row? And if not what could be a good approach to display this in a clear structure?
Thanks in advance
MarkusHello,
In your case, we can use column visibility to display specific values in the report.
Suppose we have a dataset (DataSet1) with Amount, Month fields in your report. And we have a parameter (month). Please refer to the steps below:
Add a matrix in the report body.
Add [Month] field in the Columns text box, [Amount] field in the Data text box.
Right click the column, select Column Visibility.
Select “Show or hide based on an expression” option, and type expression below:
=IIF(Fields!Month.Value>Parameters!month.Value Or
Fields!Month.Value<(Parameters!month.Value-2),True,False)
5.After the [Amount] text box, type following expression in the text box to calculate the average value.
=Sum(IIF(Fields!Month.Value>Parameters!month.Value Or
Fields!Month.Value<(Parameters!month.Value-2),0,Fields!Amount.Value))/3
If you have any questions, please feel free to ask.
Regards,
Alisa Tang
Alisa Tang
TechNet Community Support -
How to avoid max number of column alv grid (kkblo_header).
Hi,
I need display more than 100 columns in alv grid. How can I do this? In structure kkblo_header is max. 100 col.
Thanks, zd.Hi Zdenek,
Have you tried to create a structure (via SE11 transaction) and assign it as the base structure to form the field catalog for your ALV Report?
I hope I had helped you.
Regards,
Daniel Carvalho. -
Max of one column in another column
HI all
I have a scenario in the WebI report where I need to get the Maximum value from one column and use that maximum value in calculation of another column for each row in that column.
for ex:
column A
1
2
3
4
5
Max of column A [MAX]= 5
Column B
1/ [MAX]
2/[MAX]
3/[MAX]
4/[MAX]
5/[MAX]
Column B calculation is some thing like described above.
but my issue is, in WebI values are caluclated row wise and while generating values for the first row in column B, it picks the value 1 but the MAX value is not yet caluclated and if I use Max variable it is caluculating as 1/1 for first row and 2/2 and 3/3. Instead of 1/5, 2/5, 3/5.
Any idea please share it.
Thanks
Edited by: saathiyaa on Feb 19, 2011 1:23 AMNo its not working, well actually columb B is nothing but individual value of that row divided by max of that row
for ex:
1/5
2/5
3/5
4/5
5/5
But if i have formula like COLA/MAX[A]
it is cosidering as 1/1, 2/2, 3/3, 4/4.5/5
becuase webi caluclates row wise, so when it is in first row you will see maximum of that column is not yet calculated so it is taking as 1/1 not 1/5. -
Hi,
I have a simple basivc question.... What is the maximum number of columns that a DSO can have ? How many maximum characteristics can it accomodate ?
Please write back asap
regards
Shweta- You can create a maximum of 16 key fields (if you have more key fields, you can combine fields using a routine for a key field (concatenate).)
- You can create a maximum of 749 fields
- You can use 1962 bytes (minus 44 bytes for the change log)
- You cannot include key figures as key fields
http://help.sap.com/saphelp_nw04/helpdata/en/4a/e71f39488fee0ce10000000a114084/content.htm
749 Columns -
Max. no of columns in ALV Excel download
I've a problem regarding the download of data from alv report's that have more than 99 columns.
I have searched the forum but couldn't find a right answer.
It is being done by standard option and not by custom functionality is there any way where we can increase this limitation.I don't know if there is a way it for more columns using that function. But I suggest you to use excel inplace tool. With excel inplace users directly display and maintain values in SAP screen and they can save final document without any limits I think. Just go to change layout-> view and choose microsoft excel. To be able to display excel using this option macro security in installed MS Excel should be in low and VB script execution must be on.
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