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Results tagged with delete
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user 630
In the database structured query language (SQL), the DELETE statement removes one or more records from a table.
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votes
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Optimization: Delete with Top and minimize the where clause date range
You trade off
speed
smaller transaction log
concurrency
So running this in batches with a good index satisfies the last 2, but is slower. However, you don't need absolute speed if it is less intru …
- 70.1k
42
votes
Accepted
Methods of speeding up a huge DELETE FROM <table> with no clauses
What you can do is batch deletes like this:
SELECT 'Starting' --sets @@ROWCOUNT
WHILE @@ROWCOUNT <> 0
DELETE TOP (xxx) MyTable
Where xxx is, say, 50000
A modification of this, if you want to remove … SELECT 'Starting' --sets @@ROWCOUNT
WHILE @@ROWCOUNT <> 0
DELETE TOP (xxx) MyTable WHERE ...
INSERT MyTable (col1, col2, ...)
SELECT col1, col2, ... FROM #Holdingtable …
- 70.1k
10
votes
Safely deleting a SQL Server log file (.LDF)
If you delete the LDF (SQL Server shut down), your database comes back "suspect".
If you detach+delete, attach the MDF by itself, the LDF is re-created. …
- 70.1k