The document discusses using the "RETURN UPDATED ROWS" clause in SQL queries. This clause will return only rows that were newly inserted or updated by the query, rather than all rows matching the condition. For example, if a query updates rows where location = Sohar and prodno=1, "RETURN UPDATED ROWS" will show just the changed rows rather than all matching rows.

1. Dr. Girija Narasimhan
Model Clause
1
Part 10-sql model clause
RETURN UPDATED ROWS

2. Dr. Girija Narasimhan
Model Clause
2
Suppose in the previous query the entire row those satisfying the condition
location = Sohar and prodno=1. But the output will show newly created row or
inserted row by using rule clause, then use “return updated rows”. Then it will
display only the newly created row.