When Can you be sure that a query will return only one row?

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When Can you be sure that a query will return only one row?..

Answer / shailendra

when you will retrive the record on the basis of primary key
for the perticuler record.

as like
select * from table_name where acct_no =2345678754332

the above given answeris also right

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When Can you be sure that a query will return only one row?..

Answer / s

A Matching Index scan with equal predicate on a Unique
index will return only one row.

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When Can you be sure that a query will return only one row?..

Answer / shankar

When you use CURSORS in your program.

or

when you use FETCH FIRST (n) ROW ONLY option on your SELECT
statement.

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When Can you be sure that a query will return only one row?..

Answer / shekhar

when u use column function without using group by clause. it will give only single value. PLz correct if i m wrong.

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