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4
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1answer
126 views

Restored DB has data, DBCC CHECKDB is clean, but SELECT TOP 1 returns zero rows

Having restored a client's SQL 2014 EE DB onto our Developer Edition instance, without issue, then running a DBCC CHECKDB that found zero errors, and a clustered columnstore index alleging over 1Bn ...
0
votes
1answer
62 views

Array as a column vs lookup table

Hi I have two tables that has one to many relationship. Table 1 Users: ------------- | id | name | ------------- | 01 | John | ------------- | 02 | Harry | -----------...
0
votes
1answer
43 views

DB with column store and parallel query execution?

I am looking for open-source alternatives to SQL Server Enterprise Edition for a mostly-read analytics workload. The main key features that I'm looking for are Column-oriented storage Parallel ...
0
votes
1answer
47 views

Columnar & Row Oriented DB

In a previous question, I discussed some challenges with a row-oriented table. I have two tables in this application. The first table is well-suited for row-oriented operation; the second is well-...
0
votes
1answer
30 views

Record scan speed, column orientated databases and SSDs

I'm learning about column orientated databases. I have just watched a YouTube video on column orientated databases by Arnaldo from MIT, who suggests an interesting motivation for column orientated ...
4
votes
0answers
59 views

Columnstore index and low selective columns

I have a table with almost 1T rows. create table bigtable ( K1 int, K2 date, -- PK columns C1 ..., C8 ...., -- columns with various data types like float, date, varchar, ... B1 bit, B2 bit, .......
2
votes
0answers
35 views

Is there impact on query execution as more partitions are added to a table?

We are looking to heavily use partitioned tables in our data warehouse environment. We are looking to take advantage of fast partition switching as well as partition elimination during analytical ...
2
votes
0answers
53 views

Column Store Indices versus Dimensional Tables

I have a Data Warehouse and want to think ahead one year when I may get a database update allowing me to use column store indices. My dimensional tables are mostly junk dimensions containing columns ...
2
votes
0answers
378 views

Best Practice to update columnstore indexed tables

I have a table with aprox. 22 Bn rows, for each month I have made one partition that and each partition has two data files. I created the columnstore index on this table and the performance ...
1
vote
0answers
54 views

Clustered Columnstore Index on Table with Foreign key

Using SQL Server 2014, I am trying to create a clustered columnstore index on a table which is referenced by a foreign key. This is the syntax I am using CREATE CLUSTERED COLUMNSTORE INDEX ...
1
vote
0answers
51 views

Failed to allocate reserved pages: FAIL_RESERVED_PAGE_ALLOCATION

Last night I received the error on one of my servers of: Failed to allocate reserved pages: FAIL_RESERVED_PAGE_ALLOCATION 2047 I know that this has already been discussed on here some but all ...
1
vote
0answers
34 views

Storage solution for realtime time series analytics

I'm designing a system which allows user to analyze their data over time. It is like a IoT database which stores a lot of information from different devices from the user. I don't think that a normal ...
0
votes
0answers
84 views

Columnstore Index Scan Cardinality Estimates

In SQL Server 2012, I am seeing large cardinality estimate discrepancies for a columnstore index scan. It looks like statistics have been generated for the index, but I don't see any details in DBCC ...
0
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0answers
86 views

Is it possible to set Buffer pool extension on table having clustered Column Store index in SQL Server 2014?

I created Clustered Column Store index on a table. I want to improve memory performance using buffer pool. Is it possible to set buffer pool on sql server, a table having clustered column Store index ...