How do I UPDATE a large table?

How do you update an entire table?

To update data in a table, you need to:1First, specify the table name that you want to change data in the UPDATE clause.2Second, assign a new value for the column that you want to update. ... 3Third, specify which rows you want to update in the WHERE clause.

How do you update a table with a large number of updates?

1Gather the updates you want to do into a temporary table with a RowID, call it #Updates.2Create another temporary table just to hold RowIDs, call it "#Done"3Start a loop which runs until there are 0 rows in #Updates which aren't in #Done.

How do you update a large table with millions of rows in Oracle?

Efficient way to UPDATE bulk of records in Oracle Database1Update each record individually and COMMIT in FOR LOOP.2Update each record individually in FOR LOOP but COMMIT after the loop.3BULK UPDATE using BULK COLLECT and FOR ALL.4DIRECT UPDATE SQL.5MERGE STATEMENT.6UPDATE using INLINE View Method.

How do you update a million records?

How to (efficiently) update millions of records in a SQL table1@results – this variable will hold the number of records updated; when zero, the query will stop. ... 2@batchId – this is set to zero initially, and it is used to compare the table id against it, and after each update, it is set to the id plus the batch size.