“SQL Limit Clause” Ответ

SQL -предельные результаты

-- MySql
SELECT * FROM emp ORDER BY sal DESC LIMIT 5;	
-- SQL Server 
SELECT TOP 5 * FROM emp ORDER BY sal DESC;	
-- 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;
VasteMonde

SQL Limit Clause

SELECT first_name, age
FROM Customers
LIMIT 2;
SAMER SAEID

Rownum в SQL

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

ограничение SQL

SELECT * FROM customer
LIMIT 10;
Scary Salamander

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