PL/SQL User's Guide and Reference

INSERT Statement
returning_clause
This clause lets you return values from inserted rows, thereby eliminating the need
to SELECT the rows afterward. You can retrieve the column values into variables
and/or host variables, or into collections and/or host arrays. However, you cannot
use the RETURNING clause for remote or parallel inserts. For the syntax of
returning_clause, see "DELETE Statement" on page 13-58.
sql_expression
This is any expression valid in SQL. For more information, see Oracle9i SQL
Reference.
subquery
This is a SELECT statement that provides a set of rows for processing. Its syntax is
like that of select_into_statement without the INTO clause. See "SELECT
INTO Statement" on page 13-166.
subquery3
This is a SELECT statement that returns a value or set of values. As many rows are
added to the table as are returned by the subquery. It must return a value for every
column in the column list or for every column in the table if there is no column list.
table_reference
This identifies a table or view that must be accessible when you execute the INSERT
statement, and for which you must have INSERT privileges. For the syntax of
table_reference, see "DELETE Statement" on page 13-58.
TABLE (subquery2)
The operand of TABLE is a SELECT statement that returns a single column value,
which must be a nested table. Operator TABLE informs Oracle that the value is a
collection, not a scalar value.
VALUES (...)
This clause assigns the values of expressions to corresponding columns in the
column list. If there is no column list, the first value is inserted into the first column
defined by the CREATE TABLE statement, the second value is inserted into the
second column, and so on. There must be only one value for each column in the
column list. Also, the datatypes of the values being inserted must be compatible
with the datatypes of corresponding columns in the column list.
PL/SQL Language Elements 13-105