Use function to wrap a long sql statement : function « Procedure Function « SQL Server / T-SQL Tutorial






4>
5> CREATE TABLE authors(
6>    au_id          varchar(11),
7>    au_lname       varchar(40)       NOT NULL,
8>    au_fname       varchar(20)       NOT NULL,
9>    phone          char(12)          NOT NULL DEFAULT ('UNKNOWN'),
10>    address        varchar(40)           NULL,
11>    city           varchar(20)           NULL,
12>    state          char(2)               NULL,
13>    zip            char(5)               NULL,
14>    contract       bit               NOT NULL
15> )
16> GO
1> insert authors values('1',  'Joe',   'Abra',   '111 111-1111', '6 St.', 'Berkeley',  'CA', '11111', 1)
2> insert authors values('2',  'Jack',  'Majo',   '222 222-2222', '3 St.', 'Oakland' ,  'CA', '22222', 1)
3> insert authors values('3',  'Pink',  'Cherry', '333 333-3333', '5 Ln.', 'Vancouver', 'BC', '33333', 1)
4> insert authors values('4',  'Blue',  'Albert', '444 444-4444', '7 Av.', 'Vancouver', 'BC', '44444', 1)
5> insert authors values('5',  'Red',   'Anne',   '555 555-5555', '6 Av.', 'Regina',    'SK', '55555', 1)
6> insert authors values('6',  'Black', 'Michel', '666 666-6666', '3 Pl.', 'Regina',    'SK', '66666', 1)
7> insert authors values('7',  'White', 'Sylvia', '777 777-7777', '1 Pl.', 'Rockville', 'MD', '77777', 1)
8> insert authors values('8',  'Yellow','Heather','888 888-8888', '3 Pu',  'Vacaville', 'CA', '88888', 0)
9> insert authors values('9',  'Gold',  'Dep',    '999 999-9999', '5 Av.', 'Oakland',   'CA', '99999', 0)
10> insert authors values('10', 'Siler', 'Dean',   '000 000-0000', '4 Av.', 'Oakland',   'CA', '00000', 1)
11> GO

(1 rows affected)

(1 rows affected)

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1>
2> CREATE TABLE titleauthor(
3>    au_id          varchar(20),
4>    title_id       varchar(20),
5>    au_ord         tinyint               NULL,
6>    royaltyper     int                   NULL
7> )
8> GO
1>
2> insert titleauthor values('1', '2', 1, 60)
3> insert titleauthor values('2', '3', 1, 100)
4> insert titleauthor values('3', '4', 1, 100)
5> insert titleauthor values('4', '5', 1, 100)
6> insert titleauthor values('5', '6', 1, 100)
7> insert titleauthor values('6', '7', 2, 40)
8> insert titleauthor values('7', '8', 1, 100)
9> insert titleauthor values('8', '9', 1, 100)
10> GO

(1 rows affected)

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1>
2> CREATE TABLE sales(
3>    stor_id        char(4)           NOT NULL,
4>    ord_num        varchar(20)       NOT NULL,
5>    ord_date       datetime          NOT NULL,
6>    qty            smallint          NOT NULL,
7>    payterms       varchar(12)       NOT NULL,
8>    title_id       varchar(80)
9> )
10> GO
1> insert sales values('1', 'QA7442.3', '09/13/94', 75, 'ON Billing','1')
2> insert sales values('2', 'D4482',    '09/14/94', 10, 'Net 60',    '1')
3> insert sales values('3', 'N914008',  '09/14/94', 20, 'Net 30',    '2')
4> insert sales values('4', 'N914014',  '09/14/94', 25, 'Net 30',    '3')
5> insert sales values('5', '423LL922', '09/14/94', 15, 'ON Billing','3')
6> insert sales values('6', '423LL930', '09/14/94', 10, 'ON Billing','2')
7> GO

(1 rows affected)

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1>
2>    CREATE FUNCTION dbo.fnSalesCount(@SalesQty bigint)
3>    RETURNS TABLE
4>    AS
5>    RETURN (SELECT au.au_id,
6>                au.au_lname + ', ' + au.au_fname AS au_name,
7>                au.address,
8>                au.city + ', ' + au.state + ' ' + zip AS Address2
9>            FROM authors au
10>            JOIN titleauthor ta
11>                ON au.au_id = ta.au_id
12>            JOIN sales s
13>                ON ta.title_id = s.title_id
14>            GROUP BY au.au_id,
15>                au.au_lname + ', ' + au.au_fname,
16>                au.address,
17>                au.city + ', ' + au.state + ' ' + zip
18>            HAVING SUM(qty) > @SalesQty
19>            )
20>    GO
1>
2>    SELECT *
3>    FROM dbo.fnSalesCount(25)
4> GO
au_id       au_name                                                        address                                  Address2
----------- -------------------------------------------------------------- ---------------------------------------- ------------------------------
1           Joe, Abra                                                      6 St.                                    Berkeley, CA 11111
2           Jack, Majo                                                     3 St.                                    Oakland, CA 22222

(2 rows affected)
1> drop FUNCTION dbo.fnSalesCount;
2> GO
1>
2> drop table authors;
3> GO
1> drop table titleauthor;
2> drop table sales;
3> GO
1>








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