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All versions of Microsoft SQL Server (not MySQL). Please also add a version-specific tag, like sql-server-2016, since it is often relevant to the question.
-2
votes
2
answers
176
views
First query waits for loading the whole table in memory
I'm testing SQL Server 2017 performance. I've create a table like the following one:
CREATE TABLE [dbo].[AssessmentResponses](
[ResponseID] [int] IDENTITY(1,1) NOT NULL,
[AssessmentID] [int] …
7
votes
1
answer
1k
views
Deleting millions of records on SQL Server 14.0
I have two tables containing 200 Millions of records each.
I have to delete from them, approximately 70 Millions of records, based on an integer value in a column.
I'm deleting them in chunks of 4000 …
5
votes
1
answer
1k
views
Columnstore index for Key/Value Pair table on SQL Server
I need to build a database for storing assessments.
Each assessment can have an indefinite number of questions, and an indefinite number of responses.
Responses for each assessment can grow up to 5 …