Rownum in sql

Create row number in sql

SELECT t.A, t.B, t.C, ROW_NUMBER() OVER (ORDER BY t.A) as newId
  FROM dbo.tableZ AS t
  ORDER BY t.A;

Source: stackoverflow.com

Sql rownum

Returns results where the row number meets the passed condition.
Example: Returns the top 10 countries from the countries table.
SELECT * FROM countries
WHERE ROWNUM <= 10;

SQL SELECT TOP Equivalent in oracal

syntax -> SELECT column_name(s)
FROM table_name
WHERE ROWNUM <= number 
////example///
SELECT *
FROM Persons
WHERE ROWNUM <=5

Rownum in sql

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

Source: techonthenet.com

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