Solved

SQL Server Distributed Query  - what is the limit to how many different db's can be accessed in one query.

Posted on 2004-03-23
3
247 Views
Last Modified: 2007-12-19
Using a distributed, also called heterogeneous query with SQL Server 2000, what is the maximum number of different databases that can be referenced in a single query?     SQL Server 2000 supports  2^16-1 - 32767 databases in a named instance.    Again, the question is,  in a distributed query, such as :

SELECT s1.income, s2.contractlength  from  server1.database.owner.table s1, server2.database32.owner.table s2

how many different db's can be referenced in one query, is it indeed up to 32767 ? Or, can you cross query across 5 instances, including 150,000 references to db+table in the query.

Granted, 150,000 databases may seem absurd, however, I am wondering what the maxium is, whether it is 16 different databases, or even 32,767.

Tim Miltz

0
Comment
Question by:tfmiltz
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 13

Accepted Solution

by:
danblake earned 250 total points
ID: 10666269
It all becomes a lot lower:
Tables per SELECT statement 256...

So you can only reference a maximum of 256 different objects in a single query. (from linked servers/views/tables)
0

Featured Post

How Do You Stack Up Against Your Peers?

With today’s modern enterprise so dependent on digital infrastructures, the impact of major incidents has increased dramatically. Grab the report now to gain insight into how your organization ranks against your peers and learn best-in-class strategies to resolve incidents.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

I have a large data set and a SSIS package. How can I load this file in multi threading?
In this article we will learn how to fix  “Cannot install SQL Server 2014 Service Pack 2: Unable to install windows installer msi file” error ?
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.
Via a live example, show how to shrink a transaction log file down to a reasonable size.

730 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question