oracle中merge into的写法

Merge into是一种用于将数据从一个表格合并到另一个表格的SQL语句。下面是语法：

MERGE INTO table_name
USING source_table
ON (merge_condition)
WHEN MATCHED THEN
UPDATE SET column_name = source_table.column_name
WHEN NOT MATCHED THEN
INSERT (column_name) VALUES (source_table.column_name)