which cursor is faster in sql server ?

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https://stackoverflow.com › questions › 3022965 › which-is-faster-in-sql-while-loop-recursive-stored-proc-or-cursor

https://stackoverflow.com › questions › 3022965 › which-is-faster-in-sql-while-loop-recursive-stored-proc-or-cursor
sql server – Which is faster in SQL, While loop, Recursive Stored proc …
23 déc. 2021In order of performance, it would be: 1. Fast-Forward Cursor (most cursors can be FF), 2. While Loop, 3. Recursive SP. (And Set Ops would be 0 on that scale.) – TTT Jan 2, 2015 at 16:50 Add a comment Your Answer Post Your Answer By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy

https://stackoverflow.com › questions › 37029 › sql-server-fast-forward-cursors

https://stackoverflow.com › questions › 37029 › sql-server-fast-forward-cursors
SQL Server Fast Forward Cursors – Stack Overflow
1 juil. 2022With fewer records, the cursor completes faster. Some cursor properties that affect performance include: FORWARD_ONLY: Supports forwarding only the cursor from the first row to the end with FETCH NEXT. Unless set as KEYSET or STATIC, the SELECT clause is re-evaluated when each fetch is called.

https://techcommunity.microsoft.com › t5 › sql-server-blog › increase-your-sql-server-performance-by-replacing-cursors-with › ba-p › 383359

https://techcommunity.microsoft.com › t5 › sql-server-blog › increase-your-sql-server-performance-by-replacing-cursors-with › ba-p › 383359
Increase your SQL Server performance by replacing cursors with set …
Keep in mind SQL Server, as a modern RDBMS system, performs much better with set operations. Here is simplified version of a real cursor that was used to update a big table with over 200 million rows. DECLARE @EntityId Varchar (16) DECLARE @PerfId Varchar (16) DECLARE @BaseId Varchar (16) DECLARE @UpdateStatus Int DECLARE outerCursor CURSOR FOR

https://stackoverflow.com › questions › 55457215 › faster-alternative-to-using-a-cursor-in-sql-server

https://stackoverflow.com › questions › 55457215 › faster-alternative-to-using-a-cursor-in-sql-server
Faster alternative to using a cursor in SQL Server
One solution would be to store the script you want to execute in a text file, then execute it using sqlcmd, the creation of the sql script can be done using sql joins, in most cases, but I need to know more details about your script to confirm. – Kemal AL GAZZAH. Apr 1, 2019 at 14:20.

https://www.sqlshack.com › sql-server-cursor-performance-problems

https://www.sqlshack.com › sql-server-cursor-performance-problems
SQL Server cursor performance problems – SQL Shack
Even this clumsy WHILE loop is blisteringly fast in comparison to the SQL Server cursor approach. It takes less than a second but is closer to 800ms than 87ms as is the case for the pure set-based query. Conclusion People are right to loath cursors.

https://www.techrepublic.com › article › comparing-cursor-vs-while-loop-performance-in-sql-server-2008

https://www.techrepublic.com › article › comparing-cursor-vs-while-loop-performance-in-sql-server-2008
Comparing cursor vs. WHILE loop performance in SQL Server 2008
This type of cursor is the fastest cursor available in terms of strictly looping through records. As noted in the section on cursor types above, this is a combination of a READ_ONLY and a…

https://dba.stackexchange.com › questions › 153869 › which-is-faster-multiple-update-queries-in-a-cursor-loop-or-a-single-query

https://dba.stackexchange.com › questions › 153869 › which-is-faster-multiple-update-queries-in-a-cursor-loop-or-a-single-query
Which is faster? Multiple update queries in a cursor loop, or a single …
Option 1 is slow because it is going back and forth between the Stored Routine and the server. (This is not as bad as between the Client and Server, but it is still extra effort.) Option 2 is slow because of the tmp table and subquery. Option 3 is something like

https://www.quora.com › How-do-I-improve-the-cursor-performance-in-an-SQL-server?share=1

https://www.quora.com › How-do-I-improve-the-cursor-performance-in-an-SQL-server?share=1
How to improve the cursor performance in an SQL server – Quora
Cursors in SQL are used to store database tables. There are two types of cursors: Implicit Cursor Explicit Cursor Implicit Cursor: These implicit cursors are default cursors which are automatically created. A user cannot create an implicit cursor. Explicit Cursor: Explicit cursors are user-defined cursors.

https://erikdarlingdata.com › why-does-fast_forward-make-some-cursors-so-much-faster

https://erikdarlingdata.com › why-does-fast_forward-make-some-cursors-so-much-faster
Why does FAST_FORWARD make some cursors so much faster in SQL Server …
16 mai 2022The cursor with the FAST_FORWARD option took about 120 ms. The cursor with default options took about 70 minutes. Here are the wait stats for the execution: To put a positive spin on it: using the correct cursor options improved performance by 35000X on the Managed Instance. The Why I’ll start by saying that I don’t want to be a cursor expert.

https://www.sqlservercentral.com › forums › topic › cursor-gets-slower-and-slower

https://www.sqlservercentral.com › forums › topic › cursor-gets-slower-and-slower
Cursor gets slower and slower – SQLServerCentral Forums
My issue is that when the procedure begins it is much faster. As the cursor steps through the zip-sic combinations it gets slower and slower. During the first minute 74,046 rows were inserted …

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