A SELECT statement with a TOP clause and the PERCENT keyword : Top « Query « SQL Server / T-SQL Tutorial

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SQL Server / T-SQL Tutorial » Query » Top 
1. 15. 6. A SELECT statement with a TOP clause and the PERCENT keyword
If you include PERCENT, the first n percent of the selected rows are included in the result set.

8>
9>
10create table Billings (
11>     BankerID           INTEGER,
12>     BillingNumber      INTEGER,
13>     BillingDate        datetime,
14>     BillingTotal       INTEGER,
15>     TermsID            INTEGER,
16>     BillingDueDate     datetime ,
17>     PaymentTotal       INTEGER,
18>     CreditTotal        INTEGER
19>
20);
21> GO
1>
2INSERT INTO Billings VALUES (11'2005-01-22', 1651,'2005-04-22',123,321);
3> GO

(rows affected)
1INSERT INTO Billings VALUES (22'2001-02-21', 1651,'2002-02-22',123,321);
2> GO

(rows affected)
1INSERT INTO Billings VALUES (33'2003-05-02', 1651,'2005-04-12',123,321);
2> GO

(rows affected)
1INSERT INTO Billings VALUES (44'1999-03-12', 1651,'2005-04-18',123,321);
2> GO

(rows affected)
1INSERT INTO Billings VALUES (55'2000-04-23', 1651,'2005-04-17',123,321);
2> GO

(rows affected)
1INSERT INTO Billings VALUES (66'2001-06-14', 1651,'2005-04-18',123,321);
2> GO

(rows affected)
1INSERT INTO Billings VALUES (77'2002-07-15', 1651,'2005-04-19',123,321);
2> GO

(rows affected)
1INSERT INTO Billings VALUES (88'2003-08-16', 1651,'2005-04-20',123,321);
2> GO

(rows affected)
1INSERT INTO Billings VALUES (99'2004-09-17', 1651,'2005-04-21',123,321);
2> GO

(rows affected)
1INSERT INTO Billings VALUES (00'2005-10-18', 1651,'2005-04-22',123,321);
2> GO

(rows affected)
1>
2SELECT TOP PERCENT BankerID, BillingTotal
3FROM Billings
4> ORDER BY BillingTotal DESC
5>
6> GO
BankerID    BillingTotal
----------- ------------
          1          165

(rows affected)
1>
2>
3> drop table Billings;
4> GO
1. 15. Top
1. 15. 1. TOP n Clause
1. 15. 2. TOP n Query with ORDER BY
1. 15. 3. Top Clause with the UPDATE statement.
1. 15. 4. Use TOP n clause with the DELETE statement.
1. 15. 5. A SELECT statement with a TOP clause
1. 15. 6. A SELECT statement with a TOP clause and the PERCENT keyword
1. 15. 7. A SELECT statement with a TOP clause and the WITH TIES keyword
1. 15. 8. A query that uses a derived table to retrieve the top 5 Bankers by average Billing total
1. 15. 9. Define variable for query top percent
1. 15. 10. Declare variable and use it in 'TOP PERCENT'
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