Combine rows from multiple tables and remove duplicate rows.
A UNION construct contains a UNION node and at least one subtree. Each subtree contains a WFSCAN node, a WORKFILE node, a SORT node, and the source query block node.
Combine rows from multiple tables and retain duplicate rows.
An UNION ALL construct contains a UNIONA node and at least one subtree. Subtrees denote any source query blocks.
Modify rows in a table.
An update construct contains one UPDATE node and one of the following: single-index access, multiple-index access construct, or table space scan.
Represents UPDATE WHERE CURRENT OF CURSOR value.