WebMay 22, 2015 · Courtesy of @gbn: Bulk Delete on SQL Server 2008. UPDATE. Alternatively, you could try this approach by inserting the records you want to keep in a temp table and then truncate your actual table. Then, transfer back those temp table records into your actual table. WebNov 13, 2024 · Using SqlBulkCopy I can insert a large number of rows in C# into SQL Server which is really very fast. I am in need of a similar thing for delete operations. ... 30K is a small number of rows for sql,i use this to delete milions of rows in huge table. Coluld be some other problem like bad indexing, lock, heap table ecc. Share.
Most Efficient (Fast) T-SQL DELETE For Many Rows?
WebMay 25, 2024 · Run a select query to return all the primary key values in the table. Begin a transaction with SQL Server. Send a separate DELETE command for every single row in the table. Ask if you are sure you want … WebAug 17, 2016 · There are no universal method to delete the data effectively. You have to try to use all THREE methods for your table DB design: IN (SELECT ...) EXISTS () INNER JOIN In most cases, for large number of rows, EXISTS and INNER JOIN outperforms IN (SELECT..), and often EXISTS outperforms INNER JOIN Share Improve this answer Follow cbtcampusonline
How to delete large number of rows in Sql Server - DataMajor
WebSep 24, 2013 · There is a big difference. If you delete 4999 rows per transaction, and do frequent log backups, space that log records for that DELETE command use will be reused again and again and thus the log will not grow so much. The size of the log will have to hold e.g. 4999 or 9998 row (etc) delete operations at the same time. Instead of deleting 100,000 rows in one large transaction, you can delete 100 or 1,000 or some arbitrary number of rows at a time, in several smaller transactions, in a loop. In addition to reducing the impact on the log, you could provide relief to long-running blocking. See more First, I restored a copy of AdventureWorks (AdventureWorks2024.bak,to be specific). To create a table with 10 million rows, I made a copy of Sales.SalesOrderDetail,with its own identity column, and … See more Once the 10 million row table existed, I set a few options, backed up the database,backed up the log twice, and then backed up the … See more This all doesn't consider a concurrent workload, the impact of table constraintslike foreign keys, the presence of triggers, and a host of other possible scenarios.Another … See more After discarding the results from the 0.1% tests, I put the rest into a secondmetrics table with the durations loaded: I had to use an outer join on … See more WebMay 9, 2013 · Deleting a large number of records takes a VERY long time. I have a database table (running on SQL Server 2012 Express) that contains ~ 60,000 rows. //Deleting CPU measurements older than (oldestAllowedTime) var allCpuMeasurementsQuery = from curr in msdc.CpuMeasurements where … cbt campus skillport login