Solved

what is .. in sql

Posted on 2008-10-29
7
179 Views
Last Modified: 2012-05-05
Hello Experts,

What is ".." in SQL?

Thanks,
Wayne
0
Comment
Question by:thewayne73
7 Comments
 
LVL 142

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 22831116
you refer to 4-part-notation

see some variations on how to specify the table you want to query, specifying the table owner, database, linked server name, all optional.

SELECT * FROM table
SELECT * FROM table_owner.table
SELECT * FROM database.table_owner.table
SELECT * FROM database..table
SELECT * FROM linked_server.database.table_owner.table
SELECT * FROM linked_server.database..table
SELECT * FROM linked_server...table

Open in new window

0
 
LVL 60

Accepted Solution

by:
chapmandew earned 500 total points
ID: 22831117
it is use to omit the schema name of an object...so, this:

select * from databasename.schemaname.tablename

can be written (if the schemaname is dbo) as

select * from databasename..tablename

you're just leaving out the schema name
0
 
LVL 16

Expert Comment

by:brad2575
ID: 22831118
you need to be more specific.

Where at are you referring to this?  In a query?  In a table name path definition?

0
Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.

 
LVL 60

Expert Comment

by:chapmandew
ID: 22831125
angelIII, can you do this? (ive never tried it, but it doesn't make sense that you can)

SELECT * FROM linked_server...table
0
 

Author Closing Comment

by:thewayne73
ID: 31511172
Perfect explaination.  Thanks.
0
 
LVL 142

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 22831249
>angelIII, can you do this? (ive never tried it, but it doesn't make sense that you can)
>SELECT * FROM linked_server...table

yes. the default database of the login used will be "used" implicitly
0
 
LVL 142

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 22831264
also, some "linked server" (like oracle) do not have the "concept" of "instance/database", but just database, so that part of "database" must be left empty.
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

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

In this article I will describe the Backup & Restore method as one possible migration process and I will add the extra tasks needed for an upgrade when and where is applied so it will cover all.
In this article we will get to know that how can we recover deleted data if it happens accidently. We really can recover deleted rows if we know the time when data is deleted by using the transaction log.
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…

813 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

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now