Thursday, February 23, 2012

Get top 5 records in sql server


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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