Aug 27, 2014 · I am Using SQL SERVER 2008 R2 I just came across APPLY in SQL and loved how it solves query problems for so many cases, Many of the tables I was using 2 left join to get the result, I …

Mar 7, 2024 · There's always the "case by case" aspect of a question like this, but in general, is there any performance gain from using the second implementation of EXISTS() over the first one?

Oct 16, 2020 · My colleague now responsible for SQL development says that I should never use an OR statement because it will mess up the query optimizer and ignore table indexes producing slow …

Oct 13, 2021 · Can it be detrimental to performance if I add additional conditions in the where clause rather than the join clause; or is this a part which typically gets simplified and handled equally in the …

Nov 14, 2015 · Is there a best practice between using a LEFT JOIN or a NOT EXISTS format? What is benefit to using one over the other? If none, which should be preferred? SELECT * FROM tableA A …

Nov 17, 2011 · For me it is easier to just delete all the rows and insert new ones, but if this is going to fragment the table and indexes and impact performance then I would prefer to make updates where …

6 I can say what I am looking for when analyzing the performance of a query. Maybe it helps. analyze query execution plan and check for index scans, table scans, usage of convert_implicit functions for …

Mar 13, 2024 · The difference in performance is not related to the presence of a temp table or an insert operation, it is due to SQLserver using different query plans for the select with or without the FETCH …

Mar 13, 2017 · 3 I seem to be having a huge performance gap between using hard coded values for a SELECT IN, vs a STRING_SPLIT. The query plans are identical except for the last phase where the …

Apr 29, 2015 · The SQL server is Windows 2012 R2 with SQL Server 2014 Std, and has been built following the Azure SQL performance guidelines (i.e. data on a dedicated striped drive).