The
TOP clause is used to specify the number of records to return.
The
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 TOP clause.
SQL
Server Syntax
SELECT
TOP number|percent column_name(s)
FROM
table_name
SQL
SELECT TOP Equivalent in MySQL and Oracle
MySQL
Syntax
SELECT
column_name(s)
FROM
table_name
LIMIT
number
Example
SELECT
*
FROM
Persons
LIMIT
5
Oracle
Syntax
SELECT
column_name(s)
FROM
table_name
WHERE
ROWNUM <= number
Example
SELECT
*
FROM
Persons
WHERE
ROWNUM <=5
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