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Top Questions
14
votes
Why does NOLOCK make a scan with variable assignment slower?
sql-server
sql-server-2016
asked May 21, 2018 at 22:21
dba.stackexchange.com
13
votes
Why does this RX-X lock not appear in Extended Events?
sql-server
locking
sql-server-2017
asked Jul 29, 2019 at 16:20
dba.stackexchange.com
9
votes
Does STATISTICS IO output include Version Store reads?
sql-server
tempdb-version-store
asked May 9, 2019 at 2:50
dba.stackexchange.com
Top Answers
33
How to add 1 milliseconds to a datetime string?
dba.stackexchange.com
17
Does ALTER INDEX ALL REBUILD use more transaction log space with simple recovery model than rebuilding each index individually?
dba.stackexchange.com
13
Cardinality estimate outside the histogram
dba.stackexchange.com
10
Group together Similar SQL queries in sys.dm_exec_sql_text
dba.stackexchange.com
10
Sort spills to tempdb due to varchar(max)
dba.stackexchange.com
10
Converted a Scalar function to a TVF function for parallel execution-Still running in Serial mode
dba.stackexchange.com
10
Does STATISTICS IO output include Version Store reads?
dba.stackexchange.com
9
Why would optimiser choose Clustered Index + Sort instead of Non-Clustered Index?
dba.stackexchange.com
8
Mysterious conditional where clause index choices
dba.stackexchange.com
8
Why would a Clustered Index Seek return a higher "Actual Number of Rows" than there are rows in the underlying table?
dba.stackexchange.com
8
Updating Statistics: Estimated Number of Rows not equal to Actual for Index Scan. Why?
dba.stackexchange.com
7
T-SQL dynamically import XML into tables (SQL Server 2014)
dba.stackexchange.com
7
Same query hash for totally different queries
dba.stackexchange.com
6
Unbelievably slow and unusable Query Store
dba.stackexchange.com
6
Windows OS Quantum vs. SQL OS Quantum
dba.stackexchange.com
5
Rounding Down with ROUND() function
dba.stackexchange.com
5
Return number of rows based on column value
dba.stackexchange.com
5
What are the three parts of a LSN?
dba.stackexchange.com
5
Does SQL Server log record uncommited operations?
dba.stackexchange.com
5
SQL Server 2016 - Parameter Sniffing Turned Off - Still seeing where a recompile improves performance
dba.stackexchange.com
5
Locked out of an old 2008R2 Database
dba.stackexchange.com
5
Is B-Tree re-balanced during deletion of data from SQL Server table with a clustered index?
dba.stackexchange.com
5
How to query against exact values in XML column set
dba.stackexchange.com
5
Forced serialization on inline table valued function
dba.stackexchange.com
5
REORGANIZE INDEX blocks other queries
dba.stackexchange.com
5
Parameter sniffing = On with Parameterization = forced. Which takes precedence?
dba.stackexchange.com
5
Never ending Query Store search
dba.stackexchange.com
5
What is the impact on the Cost-Based Optimizer (CBO) when implementing ISCSI SAN solid-state drives
dba.stackexchange.com
5
Collect SQL Server Query Execution time in seconds
dba.stackexchange.com
5
why it is doing index seek
dba.stackexchange.com
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