sql - Query with a UNION sub-query takes a very long time - Stack …
Mar 9, 2016 · Is Uid indexed? If not it may take a long time as the query engine: Generates the first result set Generates the second result set Filters out all the dupes (which is half the …
Why select Top clause could lead to long time cost
Mar 8, 2012 · Try using @sql_mommy query, but make sure you have the following: To get your query to run faster, you could create an index on servicerequestid and statusid in big_table_1 …
sql - MySQL update taking (too) long time - Stack Overflow
Jan 31, 2017 · 1 Another thing to take into consideration when debugging update statements taking way too much time compared to the select statement version: are the update …
The fastest backup/restore strategy for Azure SQL databases?
13 What is the fastest way to backup/restore Azure SQL database? The background: We have the database with size ~40 GB and restoring it from the .bacbac file (~4GB of compressed …
When to write a long stored procedure - Stack Overflow
A stored procedure is created from a SQL query. Maybe you can write an application/script to generate the SQL to create/update your stored procedure. Doing this would give you all the …
How useful/difficult would it be for me to learn linux shell scripting ...
0 I would definitely suggest you learn at least the basics of C/C++ to get an understanding of how computers work. You should also learn the basics of C# or Java in order to learn about the …
How long would it take a non-programmer to learn C#, the .NET …
Jul 21, 2013 · I want to learn C#, the .NET Framework, and SQL. How much time do you think it would take (if I have 5 hours a day to devote to it)? Also, what order do I learn them in? I have …
sql - Measuring Query Performance : "Execution Plan Query Cost" …
Mar 2, 2016 · Here you may read in more detail about how does it try to do this. As you can see, this may differ significantly of what you actually get. The only real query perfomance metric is, …
How much time will my SQL query take? - Stack Overflow
Jul 5, 2010 · I have a database in SQLite Administrator, with 3 tables, say A,B and C. Table A has 3 columns p1,p2 and p3, with about 2 million rows. Table B has 2 columns p1 and p4, with …
sql - INSERT INTO SELECT and SELECT INTO take much longer …
Jul 11, 2018 · The query results in ~3800 rows and like 30-40 columns. The second time executing the Truncate-INSERT INTO/SELECT INTO sql takes less than a second (until I …