How do you remove top 100 records from a table?
In SQL Server, DELETE TOP statement is used to delete the records from a table and limit the number of records deleted regarding a fixed value or percentage. Syntax: DELETE TOP (top_value) [ PERCENT ] FROM [database_name].
How do I delete top 10 records?
Example – Using TOP keyword Let’s look at a SQL Server example, where we use the TOP keyword in the DELETE statement. For example: DELETE TOP(10) FROM employees WHERE last_name = ‘Anderson’; This SQL Server DELETE TOP example would delete the first 10 records from the employees table where the last_name is ‘Anderson’.
Is it easy to delete a table with 87 million rows?
Over the weekend I realized that deleting 80% of the records on a table with 87 million rows is not quite as easy as issuing a delete statement with a where criteria. The main reason is that the transaction log quickly grows as it needs to keep track of all the uncommitted rows that are being deleted.
How to delete millions of rows in MySQL?
So, IMO, if you can afford to have the luxury of creating a partition in your table, go for the option #4, otherwise, you are stuck with option #3. Do it in batches of lets say 2000 rows at a time. Commit in-between. A million rows isn’t that much and this will be fast, unless you have many indexes on the table.
How to delete large number of Records in SQL Server?
Restore a backup that had stats already updated and auto-stats disabled (to prevent any triggered stats updates from interfering with delete operations) We also have many variables that will change per test: Of that total, number of rows to delete per loop iteration (all (so no loop), 10%, 1%)
Is it safe to delete 1 million rows in SQL Server?
As mentioned above, anything over 5000 can cause locking (which I was not aware of). This would be best done after hours… but 1M rows is really not a lot for SQL to handle.