How to Limit the Number of Rows Returned by an Oracle Query After Ordering

How do I limit the number of rows returned by an Oracle query after ordering?

You can use a subquery for this like

select *
from  
( select * 
  from emp 
  order by sal desc ) 
where ROWNUM <= 5;

Have also a look at the topic On ROWNUM and limiting results at Oracle/AskTom for more information.

Update:
To limit the result with both lower and upper bounds things get a bit more bloated with

select * from 
( select a.*, ROWNUM rnum from 
  ( <your_query_goes_here, with order by> ) a 
  where ROWNUM <= :MAX_ROW_TO_FETCH )
where rnum  >= :MIN_ROW_TO_FETCH;

(Copied from specified AskTom-article)

Update 2:
Starting with Oracle 12c (12.1) there is a syntax available to limit rows or start at offsets.

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

See this answer for more examples. Thanks to Krumia for the hint.

How to limit the results to 1 row in Oracle SQL

In Oracle you need to do the ordering first and then select rownum. Thus, you need to nest the query which returns the sorted data and take the filtering WHERE clause outside.

SELECT * FROM
(
 SELECT customerNumber
 FROM ORDERS 
 GROUP BY customerNumber 
 ORDER BY count(orderNumber) DESC
) resultSet
WHERE ROWNUM=1;

limit' clause in Oracle SQL SQL command not properly ended

Generally, we use LIMIT in MYSQL database and Rownum in Oracle.

MySQL Syntax:

SELECT column_name(s)
FROM table_name
WHERE condition
LIMIT number;

Oracle Syntax:

SELECT column_name(s)
FROM table_name
WHERE ROWNUM <= number;

References:

https://www.w3schools.com/sql/sql_top.asp

How to limit the number of records returned by an ORACLE query?

Add "where rownum <= # of entries" at the end of your query.

How to LIMIT query results in Oracle 11g?

You need to add an ORDER BY clause to sort your entries from highest to lowest and then you can use an outer SELECT to get the first entry out of it:

SELECT *
FROM 
(SELECT p.product_name, SUM(o.quantity) no_of_product_sale
FROM Order_Address_Quantity o
JOIN Product p ON p.product_code = o.product_id
GROUP BY p.product_name
ORDER BY 2 DESC )
WHERE ROWNUM = 1;

Query limit in oracle database

FETCH FIRST is only available since Oracle 12c.

For the rownum approach, use a subquery that contains order by, then limit the rows in the enclosing query:

SELECT * FROM (
    SELECT * FROM ALARMS WHERE OBJECT_ID=0 AND TIMESTAMP<=152567750417
    ORDER BY TIMESTAMP DESC
) dt
WHERE ROWNUM<=51 

Limit the number of rows returned from a query in both oracle and postgres

Both database systems support the ANSI standard fetch first:

select *
from some_table
order by something
OFFSET 10 ROWS
FETCH FIRST 10 ROWS ONLY;

Oracle started supporting that with 12.1

• fetch first in the Postgres manual
• fetch first in the Oracle manual

How to select top five or 'N' rows in Oracle 11g

You'll need to use DISTINCT before you select the "top 5":

SELECT * FROM 
(SELECT DISTINCT ani_digit, ani_business_line FROM cta_tq_matrix_exp) A
WHERE rownum <= 5

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