3> CREATE TABLE titles(
4> title_id varchar(20),
5> title varchar(80) NOT NULL,
6> type char(12) NOT NULL,
7> pub_id char(4) NULL,
8> price money NULL,
9> advance money NULL,
10> royalty int NULL,
11> ytd_sales int NULL,
12> notes varchar(200) NULL,
13> pubdate datetime NOT NULL
14> )
15> GO
1>
2> insert titles values ('1', 'Secrets', 'popular_comp', '1389', NULl, $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 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
1>
2> SET ANSI_NULLS OFF
3> GO
1> SELECT * FROM titles WHERE price = NULL
2> GO
title_id title type pub_id price advance royalty ytd_sales notes
pubdate
-------------------- -------------------------------------------------------------------------------- ------------ ------ --------------------- --------------------- ----------- ----------- ----------
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ---------
--------------
1 Secrets popular_comp 1389 NULL 8000.0000 10 4095 Note 1
1994-06-1
2 00:00:00.000
(1 rows affected)
1>
2> -- Second batch will return no rows
3>
4> SET ANSI_NULLS ON
5> GO
1>
2> SELECT * FROM titles WHERE price = NULL
3> GO
title_id title type pub_id price advance royalty ytd_sales notes
pubdate
-------------------- -------------------------------------------------------------------------------- ------------ ------ --------------------- --------------------- ----------- ----------- ----------
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ---------
--------------
(0 rows affected)
1>
2> drop table titles;
3> GO
| 26.1.ANSI_NULLS |
| 26.1.1. | SET ANSI_NULLS ON/OFF |