Transact SQL :: Disadvantages Of Column Store Index
Nov 3, 2015What are the disadvantages of columnstore index in Sql Server 2012
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Transact SQL :: Getting List Of Clustered Column-store Index In A Database In 2014?
Sep 17, 2015How can we get the list of clustered columnstore index in a database in sql server 2014
View 3 Replies View RelatedSQL 2012 :: Column Store Index Refresh
Aug 20, 2015When we use Partition switch and load the data to a table, can we refresh the indexes for specific partition, so that we don't need to rebuild / refresh for complete is this possible ?
View 1 Replies View RelatedDB Design :: Column Store Index And Constraints
Oct 20, 2015can you have constraints as such [CreateBy] [nvarchar](30) NOT NULL DEFAULT (suser_sname()),on a table that has a column store index in SQL Server 2012,2014, or 2016?
View 3 Replies View RelatedTraditional Indexes Vs Clustered Column-store Index
Apr 3, 2015I've been asked to look at using Clustered Columnstore indexes for one of my tables. The table contains about 5 million records with about 50 columns. The max field size is a NVarchar(MAX) with max field length currently of about 4k characters. It's only about a gigabyte's worth of data. The table is about 50% R/W operations. Currently, we have multiple indexes with no clustered index due to some performance issues that happened in the past. I've been attempting to determine if it's even really worth it to switch over. I feel that the table is still fairly small with minimal columns and don't believe there will be any noticeable improvement over traditional indexing.
View 3 Replies View RelatedSQL Server 2012 :: Non-Clustered Column Store Index On Table
Jun 18, 2015I have created NONCLUSTERED index on table but my report is taking more time that's why i created columnstore NONCLUSTERED index on the same table but i have one query, if any table have row and column level index(same columns in index) . Which index query will consider.
View 1 Replies View RelatedSQL 2012 :: Disabling Column Store Index And Try Loading Data
Oct 17, 2015We have a typical issue with Column Store Index, we have a procedure which does 2 activities - Switch & Reverse Switch
Switch:
1. Fetch the Partitions needed to be switched
2. Switch the data from Main Table to Switch table
2. Disable the Column store on Switch table
SSIS Package:
3. Load data to Switch (Insert / Update)
Reverse Switch:
4. Enable the Switch
5. Switch back the data from Switch table to Main table
Issue: Some time the Column store is not getting disabled, and the package fails complaining try disabling the Column store index and try loading data.
If we re-run the procedure, the column store gets disabled.
Data Warehousing :: Creating A Table With Column Store Index?
Sep 26, 2015I am trying to create a sample table in the Azure SQL Data warehouse but its giving me a syntax error Incorrect syntax near the keyword 'CLUSTERED'.
CREATE TABLE [dbo].[FactInternetSales]
( [ProductKey] int NOT NULL
, [OrderDateKey] int NOT NULL
, [CustomerKey] int NOT NULL
, [PromotionKey] int NOT NULL
[Code] ....
what's the correct syntax
SQL Server 2014 :: Indexed View Not Being Used For Partitioned Clustered Column-store Index?
Oct 9, 2015I am trying to use an indexed view to allow for aggregations to be generated more quickly in my test data warehouse. The Fact Table I am creating the indexed view on is a partitioned clustered columnstore index.
I have created a view with the following code:
ALTER view dbo.FactView
with schemabinding
as
select local_date_key, meter_key, unit_key, read_type_key, sum(isnull(read_value,0)) as [s_read_value], sum(isnull(cost,0)) as [s_cost]
, sum(isnull(easy_target_value,0)) as [s_easy_target_value], sum(isnull(hard_target_value,0)) as [s_hard_target_value]
, sum(isnull(read_value,0)) as [a_read_value], sum(isnull(temperature,0)) as [a_temp], sum(isnull(co2,0)) as [s_co2]
, sum(isnull(easy_target_co2,0)) as [s_easy_target_co2]
, sum(isnull(hard_target_co2,0)) as [s_hard_target_co2], sum(isnull(temp1,0)) as [a_temp1], sum(isnull(temp2,0)) as [a_temp2]
, sum(isnull(volume,0)) as [s_volume], count_big(*) as [freq]
from dbo.FactConsumptionPart
group by local_date_key, read_type_key, meter_key, unit_key
I then created an index on the view as follows:
create unique clustered index IDX_FV on factview (local_date_key, read_type_key, meter_key, unit_key)
I then followed this up by running some large calculations that required use of the aggregation functionality on the main fact table, grouping by the clustered index columns and only returning averages and sums that are available in the view, but it still uses the underlying table to perform the aggregations, rather than the view I have created. Running an equivalent query on the view, then it takes 75% less time to query the indexed view directly, to using the fact table. I think the expected behaviour was that in SQL Server Enterprise or Developer edition (I am using developer edition), then the fact table should have used the indexed view. what I might be missing, for the query not to be using the indexed view?
Transact SQL :: Index Fragmentation For Identity Column?
Jun 26, 2015In my database all columns have Identity Value as a PK.
Now today I check Index Fragmentation I saw that many cluster and Non cluster Index are avg.Fragmentation is around 99 % I thought that in Identity column record is always inserted at bottom so there is no fill factor assigned to it.
So in this case Do I need to set Fill factor for Cluster and Non Cluster Index?
If Yes Then For PK How much - 95 % or what? and same for Non cluster or It should around 85 to 90
Transact SQL :: Tables With FK Column Without Non-clustered Index
Oct 22, 2014I need to find out all the tables in database, which has FK columns and don’t have any Non-clustered index on them.
View 11 Replies View RelatedTransact SQL :: Fragmentation Levels Of All The Clustered Column-store Indexes In A Database?
Sep 18, 2015I have a database in which I have some tables in which I have implemented Clustered columnstore Index. How to find the fragmentation levels of all these indexes via a single T-SQl script
View 3 Replies View RelatedClustered Index On Client_ID+ORderNO+OrdersubNo, If I Create 3 Noncluster Index On Said Column Will It Imporve Performance
Dec 5, 2007
Dear All.
We had Teradata 4700 SMP. We have moved data from TD to MS_SQL SERVER 2003. records are 19.65 Millions.
table is >> Order_Dtl
Columns are:-
Client_ID varchar 10
Order_ID varchar 50
Order_Sub_ID decimal
.....
...
..
.
Pk is (ClientID+OrderId+OrderSubID)
Web Base application or PDA devices use to initiate the order from all over the country. The issue is this table is not Partioned but good HP with 30 GB RAM is installed. this is main table that receive 18,0000 hits or more. All brokers and users are using this table to see the status of their order.
The always search by OrderID, or ClientID or order_SubNo, or enter any two like (Client_ID+Order_Sub_ID) or any combination.
Query takes to much time when ever server receive more querys. some orther indexes are also created on the same table like (OrderDate, OrdCreate Date and Status)
My Question are:-
Q1. IF Person "A" query to DB on Client_ID, then what Index will use ? (If any one do Query on any two combination like Client_ID+Order_ID, So what index will be uesd.? How does MS-SQL SERVER deal with these kind of issues.?
Q2. If i create 3 more indexes on ClientID, ORderID and OrdersubID. will this improve the performance of query.if person "A" search record on orderNo so what index will be used. (Mind it their would be 3 seprate indexes for Each PK columns) and composite-Clustered index is also available.?
Q3. I want to check what indexes has been used? on what search?
Q4. How can i check what table was populated when, or last date of update (DML)?
My Limitation is i Dont Create a Partioned table. I dont have permission to do it.
In Teradata we had more than 4 tb record of CRM data with no issue. i am not new baby in db line but not expert in sql server 2003.
I am thank u to all who read or reply.
Arshad
Manager Database
Esoulconsultancy.com
(Teradata Master)
10g OCP
Store Result[index] From Table In Local Var
Apr 30, 2008Hi,
Can I take the [index] result from a table and store it in a local var?
For example a table
declare @keyWords(
word varchar(40),
wordLen smallint
)
word len
---- ---
test 4
t 1
e 1
declare @index smallInt = 2
SET @keyWord = SELECT TOP @INDEX word FROM @KeyWords
This obviously is not correct for several reasons (TOP returns multiple results, TOP doesn't work with local var etc)
In What Order Does A Clustered Index Store Data?
Mar 26, 2007Hi
I was going through the book by Kalen Delaney where she has mentioned the following paragpraph in Chapter 7 (Index Internals):
Many documents describing SQL Server indexes will tell you that the clustered index physically stores the data in sorted order. This can be misleading if you think of physical storage as the disk itself. If a clustered index had to keep the data on the actual disk in a particular order, it could be prohibitively expensive to make changes. If a page got too full and had to be split in two, all the data on all the succeeding pages would have to be moved down. Sorted order in a clustered index simply means that the data page chain is logically in order.
Then I read the book on SQL Server 2000 (on Perf Tuning) by Ken England. He says the clustered index stores data in physical order and any insert means moving the data physically. Also the same statement is echoed on the net by many articles.
What is the truth? How are really clustered index stored? What does physical order in the above statement really mean?
Regards
SanjaySi
Transact SQL :: How To Combine Two Store Procedure
Jun 12, 2015How to combine two or more procedure to make a single query.
I tried like below:
EXEC PROC1
UNION
EXEC PROC2
UNION
EXEC PROC 3
Its throwing invalid syntax.
Transact SQL :: Include A Condition In Store Proc
Sep 29, 2015I have an existing store proc with insert and update statements, I want to add a condition at the top of the proc with conditions like;
declare @dayofweek int
set datefirst 1
select @dayofweek = datepart(dw,getdate())
--select @dayofweek
if @dayofweek = 1
[Code] ...
If the condition meets with either of the above 2 conditions, than have to run the actual store proc.
My actual Storeproc in which I need to incorp the above conditions is:
CREATE PROCEDURE [dbo].[Load_Product]
@FileDate date = NULL
AS
BEGIN
DECLARE @EventText varchar(500),
@Rows int = 0,
@RowsTotal int = 0,
[Code] .....
Transact SQL :: Split A String And Store As First And Second Part
Jul 17, 2015I am using SQL Server 2008. I have strings like this:
AB-123
CDW-32
declare @First_Part varchar(3)
declare @Second_Part varchar(5)
I want to split the string with delimiter '-' and store as first part and second part.
I saw few sample functions to split a string but these return table of values.
I simply want first part and second part.
In above examples context:
@First_Part = 'AB'
@Second_Part = '123'
Any simple way to do this?
Transact SQL :: Format To Store Data In Table
May 10, 2015I would like to know what is the preferred format for form submissions to a SQL table.
View 5 Replies View RelatedDiffernce Between A Column That S A Primary Key And A Column That S A Key/index With Isunique=true
Sep 13, 2007
Hi,
Please, What s the differnce between a column that s a primary key and a column that s a "key/index with Isunique=true"?
Thanks a lot.
Transact SQL :: Store Date Permanently In Stored Proc
Aug 24, 2015I have stored procedure which runs on some period, what i want is when it first run i want to store that date permanently or till the next time it runs again, and then i need to take my data from that store proc , where hist_date between (date stored when it ran first time,example, 08/21/2015) and today date.(exampple, 08/24/2015)
Now next time when it runs , date stored should be updated in this case it should be (08/24/2015) .
How can i do this in stored proc, I tried to use temp table but it didn't work .
Transact SQL :: Why Store Procedure Not Return Any Value / Result After Using Exec
Jul 22, 2015I use new query to execute my store procedure but didnt return any value is that any error for my sql statement??
USE [Pharmacy_posicnet]
GO
/****** Object: StoredProcedure [dbo].[usp_sysconf] Script Date: 22/07/2015 4:01:38 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER procedure [dbo].[usp_sysconf]
[Code] ....
Transact SQL :: Table To Store All Transaction Happened On A Single Day
Jun 11, 2015I have a transaction table to store all the transaction happened on a single day. as per my requirement I wrote the query like this select Currency Code,TransactionCode,TransactionAmount,COUNT(TransactionCode) as [No. Of Trans] from TransactionDetails where TransactionCode in ('BNT' ,'BCN','BTC','STC','SCN','SNT') group by TransactionCode,CurrencyCode,TransactionAmount order by CurrencyCode..I got the result like this
My I want to show this result like this
ARS
BNT 0 0
BCN 0 0
SCN 1 12
BTC 0 0
STC 0 0
SNT 0 0
[code]...
and so on for all the the currency lists.how can I achieve like this .
Transact SQL :: Can Store File Data Without Streaming On Server
Oct 14, 2015I need to store file(s) to SQL without streaming / reading at Server. I have created a Web API with AngularJS and SQL. e.g.
var fileType = httpRequest.Files[file].ContentType;
var fileStrm = httpRequest.Files[file].InputStream;
var fileSize = httpRequest.Files[file].ContentLength;
byte[] fileRcrd = new byte[fileSize];
var file_Name = Path.GetFileName(filePath);
fileStrm.Read(fileRcrd, 0, fileSize);
Is it possible to send file data to SQL (in bytes) without streaming / reading at server?I don't want to put a load on server for large files. just read the data and send them to SQL where SQL will do the streaming and store data as varbinary.
Multi-column Index Vs Single Column Indexes
Aug 14, 2007Hi,Would like to know the performance differenece between Multi-columnIndex vs Single Column Indexes. Let's say I have a table with col1,col2, col3 along with a primary key column and non-indexed columns.In queries, I will use col1, col2, and col3 together and some timesjust one or two of these three columns. My questions is, should Icreate one index contains col1, col2, and col3, or create 3 seperatedcolumns. I.e. each column has its own index. Any performancedifference?Thanks a lot.
View 1 Replies View RelatedTransact SQL :: XML Not Using Proper Index?
Aug 26, 2015I have two xml queries that take long: the 1st query takes about 5 minutes (returns 700 rows) and the 2nd query takes about 10 minutes (returns 4 rows). The total rows in the table is about 2 million. There are three secondary indexes: Property, Value and Path in addition to the clustered index on CardID and Primary XML index. Here is the table definition:
CREATE TABLE [dbo].[Cards]
(
[CardId] [int] NOT NULL,
[Card] [xml] NOT NULL,
CONSTRAINT [PK_dbo_Cards_CardId] PRIMARY KEY CLUSTERED
([CardId] ASC)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
[code]...
Looking at the execution plan, the query uses the Primary XML Index even if I add any of the secondary xml indexes. My question is why does not the optimizer use the Property 2ndary index instead of the Primary XML Index? Microsoft recommends that creating a Property index for Value() method of the xml datatype would work to provide a performance benefit. What would be another alternative to make the query run faster?
Transact SQL :: Index Rebuild MP
Oct 12, 2015I would like to completely understand the difference between index rebuild Maintenace plan and the customized script.Maintenance Plan rebuilds every single index.It will take the long time as it checks every index.If we use a custom script as a job, it will rebuild the index which has fragmentation >30%.So that, the job will not take much time.
View 11 Replies View RelatedTransact SQL :: How To Store Result Of Exec Command Into Temp Table
Apr 7, 2013I wanted to insert the result-set of a Exec(@sqlcommand) into a temp table. I can do that by using:
Insert into #temp
Exec(@sqlcommand)
For this to accomplish we need to define the table structure in advance. But am preparing a dynamic-sql command and storing that in variable @sqlcommand and the output changes for each query execution. So my question is how to insert/capture the result-set of Exec(@sqlcommand) into a temp table when we don't know the table structure.
Autonumber Disadvantages
Oct 4, 2004hi,
i am thinking of using autonumber in my table which is more likely to grow over time. but i am also concerned that what if the records get too much? is there is any other fields to use instead of autonumber? is uniqueidentifier a better option? i have a bit of discussion with my colleague about this matter.
any help is appreciated
Disadvantages Using Functions
Jun 21, 2001any disadvanges using user defined functions calling from stored procedures??
View 4 Replies View RelatedAdvatnages And DisAdvantages Of
Apr 7, 2004Running SQL Server as a DOMAIN user account.
View 3 Replies View RelatedDisAdvantages Of Cursors.
Apr 25, 2008can any one help me out to know the disadvantages of the cursor
View 2 Replies View RelatedTransact SQL :: Calculate DateTime Column By Merging Values From Date Column And Only Time Part Of DateTime Column?
Aug 3, 2015How can I calculate a DateTime column by merging values from a Date column and only the time part of a DateTime column?
View 5 Replies View Related