You may be able to write it as a merge or an updatable query - see Rajesh's comments below. To help us understand what's going on with performance we need to see an execution plan though. If you post one of these we can help further. Hence this error message. If this is possible then i guess update will work and not give a non key-preserved table error. Please help.
February 26, - pm UTC. No, you define the constraints on the base tables t1, t2. Imran, February 29, - am UTC. Thanks for the DDL's. But where is your update statement? Ask Question. Asked 2 years, 9 months ago. Active 2 years, 9 months ago. Viewed 10k times. Marmite Bomber Add a comment. Active Oldest Votes.
You could also use a merge instead of an update, e. Alex Poole Alex Poole k 9 9 gold badges silver badges bronze badges. Thank you! And yes, I have multiple IDs and will make an update on that.
For now, I was just trying to get one to work. I appreciate it : — JMC. You cannot update it with a literal. If column is part of the partitioning key of a partitioned table, then UPDATE will fail if you change a value in the column that would move the row to a different partition or subpartition, unless you enable row movement.
If this subquery refers to remote objects, then the UPDATE operation can run in parallel as long as the reference does not loop back to an object on the local database. If no default value for the corresponding column has been specified, then the database sets the column to null. If you omit this clause, then the database updates all rows in the table or view.
Please refer to Chapter 7, "Conditions" for the syntax of condition. The expressions are evaluated as the row is updated. The returning clause retrieves the rows affected by a DML statement. You can specify this clause for tables and materialized views and for views with a single base table. The following statement increases the salary of an employee in the employees table on the remote database:.
Updating a Partition: Example The following example updates values in a single partition of the sales table:. Correlated Update: Example For an example that uses a correlated subquery to update nested table rows, please refer to "Table Collections: Examples". The following example shows that you can specify a single-set aggregate function in the expression of the returning clause:.
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