You can not utilize the VERSIONS clause in flashback queries to short term or exterior tables, or tables which might be Component of a cluster.
For instance, in The purchasers table, some shoppers do not have any sale representative. The value from the column saleRepEmployeeNumber is NULL as follows:
Use column to specify one or more partitioning columns. Every partition includes the list of rows inside the row sample input desk that have a similar worth(s) within the partitioning column(s).
SEED seed_value Specify this clause to instruct the database to make an effort to return a similar sample from a person execution to another. The seed_value have to be an integer amongst 0 and 4294967295. For those who omit this clause, then the resulting sample will alter from one execution to another.
If you question facts from the workers table, you will note that every client provides a sales agent. To put it differently, the next question returns no row.
Specify an expression symbolizing the worth or values of your mobile or cells specified on the correct-hand facet with the rule. expr can not include a subquery. Make reference to "Product Expressions" for info on design expressions.
We applied and preferred the 1117 flag on some situations , it’s virtually unattainable in a large organization to handhold and expand each database/file group. Do you know any way close to it ? Since We've seen it brings about unbalanced information dimensions in file teams.
The optional plus (+) is appropriate Should you be joining the TABLE selection expression With all the mum or dad table. The + creates an outer sign up for of The 2, so that the query returns rows through the outer desk whether or not the gathering expression is null.
A NULL value is not equivalent to itself. For those who Examine a NULL worth with One more NULL price or another value, The end result is NULL as the description price of Each and every NULL value is mysterious.
The c_alias record following the Look for key phrase ought to comprise column names through the column alias list for query_name.
Specify Hold out to instruct the database to wait integer seconds for the row to be out there then return Manage to you.
If an UPSERT ALL, UPSERT, or UPDATE rule isn't going to consist of the appropriate predicates, then the database might implicitly change it to a special type of rule: If an UPSERT rule has an existential predicate, then the rule is addressed being an UPDATE rule.
Utilizing the LEVEL Pseudocolumn: Examples The following statement returns all staff members in hierarchical buy. The foundation row is defined to become the worker whose work is AD_VP. The kid rows of a father or mother row are described being those who have the employee number of the guardian row as their manager amount.
Make use of the Steps clause to define a number of row sample evaluate columns. These columns are A part of the row pattern output desk and have values which have been handy for analyzing info.