Mega Code Archive
Return with aggregate function
<![CDATA[
5> CREATE TABLE titles(
6> title_id varchar(20),
7> title varchar(80) NOT NULL,
8> type char(12) NOT NULL,
9> pub_id char(4) NULL,
10> price money NULL,
11> advance money NULL,
12> royalty int NULL,
13> ytd_sales int NULL,
14> notes varchar(200) NULL,
15> pubdate datetime NOT NULL
16> )
17> GO
1>
2> insert titles values ('1', 'Secrets', 'popular_comp', '1389', $20.00, $8000.00, 10, 4095,'Note 1','06/12/94')
3> insert titles values ('2', 'The', 'business', '1389', $19.99, $5000.00, 10, 4095,'Note 2','06/12/91')
4> insert titles values ('3', 'Emotional', 'psychology', '0736', $7.99, $4000.00, 10, 3336,'Note 3','06/12/91')
5> insert titles values ('4', 'Prolonged', 'psychology', '0736', $19.99, $2000.00, 10, 4072,'Note 4','06/12/91')
6> insert titles values ('5', 'With', 'business', '1389', $11.95, $5000.00, 10, 3876,'Note 5','06/09/91')
7> insert titles values ('6', 'Valley', 'mod_cook', '0877', $19.99, $0.00, 12, 2032,'Note 6','06/09/91')
8> insert titles values ('7', 'Any?', 'trad_cook', '0877', $14.99, $8000.00, 10, 4095,'Note 7','06/12/91')
9> insert titles values ('8', 'Fifty', 'trad_cook', '0877', $11.95, $4000.00, 14, 1509,'Note 8','06/12/91')
10> GO
1>
2> CREATE FUNCTION AveragePrice2(@booktype varchar(12))
3> RETURNS money
4> AS
5> BEGIN
6>
7> RETURN ( SELECT avg(price)
8> FROM titles
9> WHERE type = @booktype)
10> END
11> GO
1>
2> drop FUNCTION AveragePrice2;
3> GO
1>
2> drop table titles;
3> GO
]]>