oracle limit sql code example

Example 1: oracle sql limit results

-- Oracle < 11g 
SELECT * FROM ( SELECT * FROM emp ORDER BY sal DESC ) WHERE ROWNUM <= 5;
	
-- Oracle 12c +
SELECT * FROM emp ORDER BY sal DESC FETCH FIRST 5 ROWS ONLY;

Example 2: oracle limit rows

SELECT * 
FROM   sometable
ORDER BY name
OFFSET 20 ROWS FETCH NEXT 10 ROWS ONLY;

Example 3: rownum in sql

SELECT ROWNUM, a.*
FROM (SELECT customers.*
      FROM customers
      WHERE customer_id > 4500
      ORDER BY last_name) a;

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