SQL SELECT TOP

Autor YouCode - http://www.youcode.com.ar/sql/sql-select-top-242

Fecha 15/02/2014

The SELECT TOP clause is used to specify the number of records to return.

The SELECT TOP clause can be very useful on large tables with thousands of records. Returning a large number of records can impact on performance.

Note: Not all database systems support the SELECT TOP clause.

SQL Server / MS Access Syntax

SELECT TOP number|percent column_name(s)
FROM table_name;

SQL SELECT TOP Equivalent in MySQL and Oracle

MYSQL

SELECT column_name(s)
FROM table_name
LIMIT number;

ORACLE

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

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