Oracle's equivalent of SQL Server's TOP command

I want to retrieve the first row in Oracle from a table, like when using the TOP keword in SQL Server (select top 1 from emp). Is there any similar command in Oracle?

If you just want the first row in the result set (non-ordered), you can simply use ROWNUM as follows:

SELECT * FROM emp WHERE rownum < 2 ;

SELECT e.*
  FROM (SELECT * FROM emp ORDER BY empno) e
 WHERE rownum < 2 ;

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