Table Partitions On Existing Tables.

Jun 4, 2007

Hi guys , assuming right now I already create partition function (PF_Date) and partition scheme (PS_Date). Let say I would like to implement the partition on the existing tables ( eg: transaction table which is in PRIMARY filegroup), how am I switch it from PRIMARY to PS_Date ? Is it I have to re-create the particular table then only able to put in the partition scheme? Hope can get any assistance here. Thanks alot.



Best Regards,

Hans

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SQL Server 2012 :: Partition Existing Table And Archive One Of The Partitions

Jun 22, 2015

I have some table that need to be partitioned and archive one of the partitions.

I did this in Oracle several years ago but not in SQL Server.

I'm looking for a basic example on how to do this.

I know the basic steps but the examples that I found on the Web were not quite what I'm looking for.

[url][/
Partition an existing SQL Server Table
url]

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Apr 8, 2012

I have three tables :

England_Summer_2001
England_Summer_2002
England_Summer_2003

The tables have the following columns :

Player, Position, [From], [To], Fee, Type, ID, League, Window

I want to create a new table, EnglandFinal with all the data from the three tables although I'm guessing it would not be a good idea to copy the primary keys (ID column) as they would clash.

I have played around with CREATE and INSERT into and UNION but I get various errors. I'm sure I've done this before!

This creates a table from a single table :

select * into Final
from England_Summer_2001

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Nov 8, 2006

I have a real table with an identity column and a trigger to populate this column.

I need to import / massage data for data loads from a different format, so I have a temp table defined that contains only the columns that are represented in the data file so I can bulk insert.

I then alter this table to add all the other columns so that it reflects all the columns in the real table. I then populate all the values so that this contains the data I need.

I then want to insert into the real table pushing the data from the temp table, however this gives me errors stating that the query returned multiple rows.

I specified all the columns in the insert grouping as well as on the select from the temp table.

ANY thoughts / comments are appreciated. This is beginning to drive me nuts.



Rob

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May 20, 2015

I normalized the below tables but I am finding it difficult to copy data to the new tables.  How do I copy data from existing table to the normalized tables? see the table structure below and other supporting information:

SKU_DATA(SKU,SKU_Description,Department,Buyer) Note: this table already has data in it.
CREATE TABLE SKU_DATA (
SKU   
   Integer NOT
NULL,

[code].....

The table structure above have two three determinants( SKU,SKU_Description and Buyer).  SKU and SKU_Description are candidate keys. Primary key is SKU.

Normalization : SKU_DATA(SKU,SKU_Description, Buyer)
 BUYER(Buyer,Department)

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May 26, 2007

Hello,

Quick question, I hope, I am trying to create a table that has a column that is a nested table in SQL Server 2005 Express Edition. Any ideas how I could go about doing this?

Sincerely,



James Simpson

Straightway Technologies Inc.

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Can Data Partitions Be Used With Associative Tables?

Aug 1, 2006

First of all, we are using SQL Server 2005 with a SQL Mobile subscriber and we are attempting to use Data Partitions on our current database
schema which contains associative tables for many-to-many relationships.

We have two tables, a User table
and an Audit table. A user can be
assigned more than one Audit. An Audit
can be assigned to more than one User.
So an AuditUser associative table exists. If data partitions are used based on User,
then any Audits that are assigned to one or more users should be copied to the
proper partition for each User (the msmerge_current_partition_mappings table
with the proper partition_id values).



In order to insert records with such a schema, the following
steps occur in order:

Insert
new row into Audit table with new rowguidInsert
entry into AuditUser table associating the auditguid with every userguid that
is assigned this audit.



Merge replication triggers are fired on insert of the Audit
row and another one for the insert of the AuditUser row.



When the Audit row is inserted, the replication trigger follows
the following logic:

Inserts
a copy of that row into the msmerge_contents table. Evaluates
the row to determine which partition(s) this row should be copied to as
well (msmerge_current_partition_mappings table). To do this, it checks to see if the
AuditGuid is referenced in one or more AuditUser rows. Since we haven€™t inserted the AuditUser
row at this point, the trigger€™s logic doesn€™t find a partition to copy
this row to.



When the AuditUser row is inserted, the replication trigger performs
the same logic as with the Audit row, it:

Inserts
a copy of that row into the msmerge_contents table.Evaluates
the row to determine which partition(s) this row should be copied to as
well (msmerge_current_partition_mappings table). Since the row meets the criteria for one
or more partitions, it is copied to the msmerge_current_partition_mappings
table for each partition that exists.



When replication occurs, we see only the AuditUser rows
copied down to our device, and not the corresponding Audit rows. Now that we understand the triggers, it is
plain to see why. If the AuditUser row
could be inserted first, then the trigger on the Audit row would copy that row
into the proper partitions and all would work well. However, the Audit row must be inserted
first, so that foreign key relationship constraints are preserved.



It seems that the Update trigger on the AuditUser row
actually walks the relationships and copies any related child rows to the
msmerge_current_partition_mappings table.

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Oct 31, 2007

Kimberly Tripp describes a recipe for switching partitions in and out, thru the use of staging tables, when it comes time to "slide the window" on a partitioned table. She says that the clustered index (on staging) must be the same as that chosen for the partitioned table itself but she doesnt discuss whether or not all of the non clustered indexes need to be the same too once the
ALTER TABLE Orders
SWITCH PARTITION 1
TO OrdersOctober2002
and
ALTER TABLE OrdersOctober2004
SWITCH TO Orders PARTITION 24
run. For the data being switched out, I wouldnt want to do anything extra. For the data being switched in, I'd like to understand if she is implying that all other indexes would be built automatically as a result of the 2nd ALTER statement?

Kimberly's article is at http://www.sqlskills.com/resources/Whitepapers/Partitioning%20in%20SQL%20Server%202005%20Beta%20II.htm#_Toc79339965

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Aug 28, 2007

Hi experts,

We have a huge table with around 250 million records and have implemented SQL server 2005's new table partitioning feature. Now the data seems to be evenly spread across 20 different filegroups ( each 5 GB approx ) for the same table that was occupying 100 GB itself in the PRIMARY filegroup earlier.

Still the query response times have not come down drastically but we could see a good improvement in the execution plans now.

WE ARE USING RAID 5 IN OUR PRODUCTION ENVIRONMENT. ANY IDEA / THOUGHT ON HOW TO PLACE THE PARTITIONED FILEGROUPS AND THE LOG FILES IN THE RAID 5 (BTW , I'm very new to RAID concepts , any detailed instruction would be helpful ).

Any help would be greatly appreciated.

Thanks,

Hariarul

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Hi,

For my work I am now learning Sql server 2005 and I have been given a database that has been set up by someone else to work with. It is my job to get the database ready for use in reports.

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I believe partitions can give a good performance boost when running the queries. But how do I do this? Currently the country codes are just plain text, can they be used for partitions?

Any advice would be welcome,

Thanks!

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Feb 26, 2008

Hi Experts,

We have a very huge database that stores 12 years of data(120 Million records). But our application mainly accesses past 3 years data i.e , the queries would scan the 120 million records even when it actually has to scan 30 million records alone (for 3 years).

Since few other important applications needs access to all the 12 years data, we are in a position to have 12 years data in the same database.

Right now we are looking for an approach that would help us to efficiently access the 3 years data alone and boost the performance.

1. Will SQL server table paritioning help in this scenario ?

Or

2. Indexed views would help us ? Is it possible to create indexed views based on year range and access the views in the stored procedures ?

Any help would be greatly appreciated.

Thanks in advance,

Hariarul

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Dec 31, 2011

I have a table that contains records of transactions with ID column is primary key

I use partition follow ID column, each partition have 1 million records.

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But now I have more records with IDs that are greater than 11.000.000. So how can I add more partitions to this table ?

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Jan 29, 2008

Guys,

First off, I'm not very familiar with SQL Server. I need some guidance on what the best path to take is for this as it may not even be table partitions.

I have a huge table (155 million rows) and it's gotten so large than I can't even delete a large set of rows from it (i.e. delete everything older than 6 mo, which would be ~100 million rows). When trying to run a delete like this, it just goes for a LONG time and then just eventually runs out of memory.

The current data in this table can actually be completely cleared out soon (after Feb 1st) and I plan to do this with TRUNCATE TABLE, or just DROP and recreate. Once I do this, I want to create a way to keep this table moderately sized so it never grows that large again and it seems table partitions may be the way to go for this?

I'd like to keep the last 6mo of data in it (I have a datetime column to keep track of this). Anything older I'd like automatically removed. Can I do this with table partitioning? Create 6 partitions that store the 6 most recent months of data and everything older automatically gets dropped off?

If not partitions, what do you suggest to keep this DB modest size?

Thank you.

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Apr 13, 2015

Perhaps this task is not for MDS.... But another tool for rapid development & startUp - we don't have. And nevertheless....

We created table managers_plan in MDS :

year
month
id_manager (domain attr)
POS (domain attr)
plan_sum_USD
plan_unit
----------------------------
Entities:
Managers ~ 800 records
POS  ~ 100 000 records

managers_plan Total records for
1 year = 100K x 12 = 1 200 000

managers_plan  - table partitions  
- Will bemade ?

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SQL 2014 I've inherited a db that has several partitioned tables.  They are partitioned by month.  We're approaching the last partition, 11-30-2015, so we need to extend the tables.  My question is how do I do this?  There are Partition Schemes and Partition Functions setup at the db level.  I've figured out how to ALTER those.  Next I go to a table that I know is partitioned, right-click Storage and select Manage Partitions. 

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So, what is the proper steps to adding new partitions to a table that is already partitioned?

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Nov 20, 2007



Hi all,
I have the following function:




Code Block
create function udf_CountRows(@pTableName sysname)
returns int
as
begin
declare @ret int

select @ret = SUM(p.rows)
from sys.partitions p
inner join sys.objects o
on p.object_id = o.object_id
and o.[name] = 'Well'

return @ret
end





Can I trust sys.partitions to always return the correct value or does it suffer the same issue as sysindexes prior to SQL2005?

Thanks
Jamie

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job_cd permit_nbr reference_nbr

ABC1 990 100002
ABC1 990 100002
ABC1 991 100003
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ABC2 880 100006
ABC2 881 100007
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ABC2 882 100008
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hello
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report_id
name

report :

report_id
dateR


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Please advise.. Thanks in advance.

Here is my code:





Code Snippet

USE pubs

DECLARE @TABLE_NAME sysname
DECLARE @AUDIT_TABLE VARCHAR(50)

SELECT @TABLE_NAME= MIN(TABLE_NAME) FROM INFORMATION_SCHEMA.TABLES
WHERE
TABLE_TYPE= 'BASE TABLE'
AND TABLE_NAME NOT LIKE 'audit%'
AND TABLE_NAME!= 'sysdiagrams'
AND TABLE_NAME!= 'Audit'
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WHILE @TABLE_NAME IS NOT NULL
BEGIN

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WHERE TABLE_NAME> @TABLE_NAME
AND TABLE_NAME = 'sales'

SELECT @AUDIT_TABLE = 'Audit'+''@TABLE_NAME''


SELECT * INTO @AUDIT_TABLE
FROM @TABLE_NAME

TRUNCATE TABLE @AUDIT_TABLE
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END
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