Re: Return data from multiple tables

#1

Quote:

I want to define query (maybe view, procedure):
select * from [???] where date>='2007-01-01' and date<='2007-04-30'

A UNION ALL query will combine multiple result sets:

SELECT *
FROM dbo.transaction_0701
UNION ALL
SELECT *
FROM dbo.transaction_0702
UNION ALL
SELECT *
FROM dbo.transaction_0703
UNION ALL
SELECT *
FROM dbo.transaction_0704

You can specify an explicit column list (a Best Practice) and encapsulate
the query in a view to facilitate reuse. You might also consider creating a
partitioned view (or a partitioned table if you are running SQL 2005
Enterprise Edition). See the Books Online for more information.

--
Hope this helps.

Dan Guzman
SQL Server MVP

"Rafa³ Bielecki" <rafal (AT) bielecki (DOT) info> wrote

Quote:

Hi there,

I have tables with such structure

transaction_YYMM
(idx,date,company_id,value)

where YYMM stands for 2digits year and month
I want to define query (maybe view, procedure):
select * from [???] where date>='2007-01-01' and date<='2007-04-30'
which will grab data from
transaction_0701
transaction_0702
transaction_0703
transaction_0704
and return all as one

best regards
Rafal

#2

Uzytkownik "Dan Guzman" <guzmanda (AT) nospam-online (DOT) sbcglobal.net> napisal w
wiadomosci news:JOz4i.22889$JZ3.9830 (AT) newssvr13 (DOT) news.prodigy.net...

Quote:

A UNION ALL query will combine multiple result sets:

SELECT *
FROM dbo.transaction_0701
UNION ALL
SELECT *
FROM dbo.transaction_0702
UNION ALL
SELECT *
FROM dbo.transaction_0703
UNION ALL
SELECT *
FROM dbo.transaction_0704

You can specify an explicit column list (a Best Practice) and encapsulate
the query in a view to facilitate reuse. You might also consider creating
a partitioned view (or a partitioned table if you are running SQL 2005
Enterprise Edition). See the Books Online for more information.

thank you Dan, your help is very important to me
Rafal

#3

Rafa³ Bielecki (rafal (AT) bielecki (DOT) info) writes:

Quote:

I have tables with such structure

transaction_YYMM
(idx,date,company_id,value)

where YYMM stands for 2digits year and month
I want to define query (maybe view, procedure):
select * from [???] where date>='2007-01-01' and date<='2007-04-30'
which will grab data from
transaction_0701
transaction_0702
transaction_0703
transaction_0704
and return all as one

In additions to Dan's response, I like to point out that from a logical
point of view, the above design is flawd. It's a lot easier to deal with a
single table. If there are enourmous volumes, it can still be motivated
with partitioning, but then we are talking enourmous values like tens
of millions of rows per month.

--
Erland Sommarskog, SQL Server MVP, esquel (AT) sommarskog (DOT) se

Books Online for SQL Server 2005 at
http://www.microsoft.com/technet/pro...ads/books.mspx
Books Online for SQL Server 2000 at
http://www.microsoft.com/sql/prodinf...ons/books.mspx

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Re: Return data from multiple tables

comp.databases.ms-sqlserver comp.databases.ms-sqlserver

Re: Return data from multiple tables - 05-22-2007 , 05:42 AM

Re: Return data from multiple tables - 05-22-2007 , 06:42 AM

Re: Return data from multiple tables - 05-22-2007 , 05:04 PM