A SELECT statement that uses the function in a join operation : function « Procedure Function « SQL Server / T-SQL Tutorial

4>
5>
6> create table Billings (
7>     BankerID           INTEGER,
8>     BillingNumber      INTEGER,
9>     BillingDate        datetime,
10>     BillingTotal       INTEGER,
11>     TermsID            INTEGER,
12>     BillingDueDate     datetime ,
13>     PaymentTotal       INTEGER,
14>     CreditTotal        INTEGER
15>
16> );
17> GO
1>
2> INSERT INTO Billings VALUES (1, 1, '2005-01-22', 165, 1,'2005-04-22',123,321);
3> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (2, 2, '2001-02-21', 165, 1,'2002-02-22',123,321.);
2> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (3, 3, '2003-05-02', 165, 1,'2005-04-12',123,321);
2> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (4, 4, '1999-03-12', 165, 1,'2005-04-18',123,321);
2> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (5, 5, '2000-04-23', 165, 1,'2005-04-17',123,321);
2> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (6, 6, '2001-06-14', 165, 1,'2005-04-18',123,321);
2> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (7, 7, '2002-07-15', 165, 1,'2005-04-19',123,321);
2> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (8, 8, '2003-08-16', 165, 1,'2005-04-20',123,321);
2> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (9, 9, '2004-09-17', 165, 1,'2005-04-21',123,321);
2> GO

(1 rows affected)
1> INSERT INTO Billings VALUES (0, 0, '2005-10-18', 165, 1,'2005-04-22',123,321);
2> GO

(1 rows affected)
1>
2>
3> create table Bankers(
4>    BankerID             Integer,
5>    BankerName           VARCHAR(20),
6>    BankerContactLName   VARCHAR(20),
7>    BankerContactFName   VARCHAR(20),
8>    BankerCity           VARCHAR(20),
9>    BankerState          VARCHAR(20),
10>    BankerZipCode        VARCHAR(20),
11>    BankerPhone          VARCHAR(20)
12> )
13> GO
1>
2> insert into Bankers values (1, 'ABC Inc.','Joe','Smith','Vancouver','BC','11111','111-111-1111');
3> GO

(1 rows affected)
1> insert into Bankers values (2, 'DEF Inc.','Red','Rice', 'New York', 'DE','22222','222-222-2222');
2> GO

(1 rows affected)
1> insert into Bankers values (3, 'HJI Inc.','Kit','Cat',  'Paris',    'CA','33333','333-333-3333');
2> GO

(1 rows affected)
1> insert into Bankers values (4, 'QWE Inc.','Git','Black','Regina',   'ER','44444','444-444-4444');
2> GO

(1 rows affected)
1> insert into Bankers values (5, 'RTY Inc.','Wil','Lee',  'Toronto',  'YU','55555','555-555-5555');
2> GO

(1 rows affected)
1> insert into Bankers values (6, 'YUI Inc.','Ted','Larry','Calgary',  'TY','66666','666-666-6666');
2> GO

(1 rows affected)
1> insert into Bankers values (7, 'OIP Inc.','Yam','Act',  'San Franc','FG','77777','777-777-7777');
2> GO

(1 rows affected)
1> insert into Bankers values (8, 'SAD Inc.','Hit','Eat',  'Orland',   'PO','88888','888-888-8888');
2> GO

(1 rows affected)
1> insert into Bankers values (9, 'DFG Inc.','Sad','Lee',  'Wisler',   'PL','99999','999-999-9999');
2> GO

(1 rows affected)
1> insert into Bankers values (0, 'GHJ Inc.','Bit','Lee',  'Ticker',   'MN','00000','000-000-0000');
2> GO

(1 rows affected)
1>
2>
3> CREATE FUNCTION fnTopBankersDue
4>     (@CutOff money = 0)
5>     RETURNS table
6> RETURN
7> (SELECT BankerName, SUM(BillingTotal) AS TotalDue
8> FROM Bankers JOIN Billings ON Bankers.BankerID = Billings.BankerID
9> WHERE BillingTotal - CreditTotal - PaymentTotal > 0
10> GROUP BY BankerName
11> HAVING SUM(BillingTotal) >= @CutOff)
12> GO
1>
2>
3>
4> --A SELECT statement that invokes the function
5>
6> SELECT * FROM dbo.fnTopBankersDue(5000)
7>
8>
9> SELECT Bankers.BankerName, BankerCity, TotalDue
10> FROM Bankers JOIN dbo.fnTopBankersDue(DEFAULT) AS TopBankers
11>      ON Bankers.BankerName = TopBankers.BankerName
12> GO
BankerName           TotalDue
-------------------- -----------

(0 rows affected)
BankerName           BankerCity           TotalDue
-------------------- -------------------- -----------

(0 rows affected)
1>
2> drop FUNCTION fnTopBankersDue;
3> GO
1>
2>
3> drop table Bankers;
4> GO

21.2.function
	21.2.1.	The syntax for creating a multi-statement table-valued function
	21.2.2.	The syntax for creating a scalar-valued function
	21.2.3.	The syntax for creating a simple table-valued function
	21.2.4.	The syntax of the ALTER FUNCTION statement for a scalar valued function
	21.2.5.	The syntax for altering a simple table-valued function
	21.2.6.	The syntax for altering a multi-statement table-valued function
	21.2.7.	Call user-defined function in where clause
	21.2.8.	Call two user-defined functions in a select statement
	21.2.9.	Function WITH SCHEMABINDING
	21.2.10.	Multistatement Table-Valued Functions
	21.2.11.	Pass a declared variable to a function
	21.2.12.	Return TOP 100 PERCENT WITH TIES from a function
	21.2.13.	Get the 3 employees with the most RegionPlace
	21.2.14.	Use function as a view
	21.2.15.	Create a scalar-valued function that returns the total Billing amount due
	21.2.16.	Invoke the scalar-valued function
	21.2.17.	A SELECT statement that uses the function in a join operation
	21.2.18.	Use function to wrap a long sql statement
	21.2.19.	Query a table returned from a function