The XML string for each output row includes all pivot values found by the subquery, even if there are no corresponding rows in the input data.
It does not mean that the database will retrieve exactly to indicate that Oracle Database prohibits any changes to the table or view that would produce rows that are not included in the subquery.
When used in the subquery of a DML statement, you can specify this clause in a subquery in the can be a subquery, a column, a function, or a collection constructor.
The output of a pivot operation typically includes more columns and fewer rows than the starting data set.
The , specify an expression that evaluates to a constant value of a pivot column.
Other references to the table, view, or materialized view throughout the query must refer to this alias.
lets you write cross-tabulation queries that rotate rows into columns, aggregating data in the process of the rotation.Oracle Database returns a set of columns in the order in which the columns were specified when the object was created.A query that selects rows from two or more tables, views, or materialized views is a join.Oracle Database returns all committed versions of the rows that existed between two SCNs or between two timestamp values.The rows returned include deleted and subsequently reinserted versions of the rows.When both clauses are used together, the instructs the database to attempt to perform random block sampling instead of random row sampling.