[ WITH with_query [, ...] ]

MERGE INTO [ ONLY ] target_table_name [ * ] [ [ AS ] target_alias ]

USING data_source ON join_condition

when_clause [...]

​

where data_source is:

​

{ [ ONLY ] source_table_name [ * ] | ( source_query ) } [ [ AS ] source_alias ]

​

and when_clause is:

​

{ WHEN MATCHED [ AND condition ] THEN { merge_update | merge_delete | DO NOTHING } |

  WHEN NOT MATCHED [ AND condition ] THEN { merge_insert | DO NOTHING } }

​

and merge_insert is:

​

INSERT [( column_name [, ...] )]

[ OVERRIDING { SYSTEM | USER } VALUE ]

{ VALUES ( { expression | DEFAULT } [, ...] ) | DEFAULT VALUES }

​

and merge_update is:

​

UPDATE SET { column_name = { expression | DEFAULT } |

             ( column_name [, ...] ) = [ ROW ] ( { expression | DEFAULT } [, ...] ) |

             ( column_name [, ...] ) = ( sub-SELECT )

           } [, ...]

​

and merge_delete is:

​

DELETE