Four cursors : Declare Cursor « Cursor « SQL Server / T-SQL Tutorial

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SQL Server / T-SQL Tutorial » Cursor » Declare Cursor 
18. 2. 6. Four cursors
3CREATE TABLE authors(
4>    au_id          varchar(11),
5>    au_lname       varchar(40)       NOT NULL,
6>    au_fname       varchar(20)       NOT NULL,
7>    phone          char(12)          NOT NULL DEFAULT ('UNKNOWN'),
8>    address        varchar(40)           NULL,
9>    city           varchar(20)           NULL,
10>    state          char(2)               NULL,
11>    zip            char(5)               NULL,
12>    contract       bit               NOT NULL
13)
14> GO
1insert authors values('1',  'Joe',   'Abra',   '111 111-1111', '6 St.', 'Berkeley',  'CA', '11111', 1)
2insert authors values('2',  'Jack',  'Majo',   '222 222-2222', '3 St.', 'Oakland' ,  'CA', '22222', 1)
3insert authors values('3',  'Pink',  'Cherry', '333 333-3333', '5 Ln.', 'Vancouver', 'BC', '33333', 1)
4insert authors values('4',  'Blue',  'Albert', '444 444-4444', '7 Av.', 'Vancouver', 'BC', '44444', 1)
5insert authors values('5',  'Red',   'Anne',   '555 555-5555', '6 Av.', 'Regina',    'SK', '55555', 1)
6insert authors values('6',  'Black', 'Michel', '666 666-6666', '3 Pl.', 'Regina',    'SK', '66666', 1)
7insert authors values('7',  'White', 'Sylvia', '777 777-7777', '1 Pl.', 'Rockville', 'MD', '77777', 1)
8insert authors values('8',  'Yellow','Heather','888 888-8888', '3 Pu',  'Vacaville', 'CA', '88888', 0)
9insert authors values('9',  'Gold',  'Dep',    '999 999-9999', '5 Av.', 'Oakland',   'CA', '99999', 0)
10insert authors values('10', 'Siler', 'Dean',   '000 000-0000', '4 Av.', 'Oakland',   'CA', '00000', 1)
11> GO
1>
2>
3>
4CREATE TABLE titles(
5>    title_id       varchar(20),
6>    title          varchar(80)       NOT NULL,
7>    type           char(12)          NOT NULL,
8>    pub_id         char(4)               NULL,
9>    price          money                 NULL,
10>    advance        money                 NULL,
11>    royalty        int                   NULL,
12>    ytd_sales      int                   NULL,
13>    notes          varchar(200)          NULL,
14>    pubdate        datetime          NOT NULL
15)
16> GO
1>
2insert titles values ('1''Secrets',   'popular_comp', '1389', $20.00, $8000.00, 104095,'Note 1','06/12/94')
3insert titles values ('2''The',       'business',     '1389', $19.99, $5000.00, 104095,'Note 2','06/12/91')
4insert titles values ('3''Emotional', 'psychology',   '0736', $7.99,  $4000.00, 103336,'Note 3','06/12/91')
5insert titles values ('4''Prolonged', 'psychology',   '0736', $19.99, $2000.00, 104072,'Note 4','06/12/91')
6insert titles values ('5''With',      'business',     '1389', $11.95, $5000.00, 103876,'Note 5','06/09/91')
7insert titles values ('6''Valley',    'mod_cook',     '0877', $19.99, $0.00,    122032,'Note 6','06/09/91')
8insert titles values ('7''Any?',      'trad_cook',    '0877', $14.99, $8000.00, 104095,'Note 7','06/12/91')
9insert titles values ('8''Fifty',     'trad_cook',    '0877', $11.95, $4000.00, 141509,'Note 8','06/12/91')
10> GO
1>
2CREATE 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>
2insert titleauthor values('1''2'160)
3insert titleauthor values('2''3'1100)
4insert titleauthor values('3''4'1100)
5insert titleauthor values('4''5'1100)
6insert titleauthor values('5''6'1100)
7insert titleauthor values('6''7'240)
8insert titleauthor values('7''8'1100)
9insert titleauthor values('8''9'1100)
10> GO
1>
2>
3> DECLARE @au_id char(11), @au_lname varchar(40), @title_id char(6),
4>     @au_id2 char(11), @title_id2 char(6), @title varchar(80)
5>
6> DECLARE au_cursor CURSOR FOR
7>     SELECT au_id, au_lname FROM authors ORDER BY au_id
8>
9> DECLARE au_titles CURSOR FOR
10>     SELECT au_id, title_id FROM titleauthor ORDER BY au_id
11>
12> DECLARE titles_cursor CURSOR FOR
13>     SELECT title_id, title FROM titles ORDER BY title
14>
15> OPEN au_cursor
16> FETCH NEXT FROM au_cursor INTO @au_id, @au_lname
17>
18> WHILE (@@FETCH_STATUS=0)
19>     BEGIN
20>     OPEN au_titles
21>     FETCH NEXT FROM au_titles INTO @au_id2, @title_id
22>
23>
24>     WHILE (@@FETCH_STATUS=0)
25>         BEGIN
26>         
27>         
28>         IF (@au_id=@au_id2)
29>             BEGIN
30>             OPEN titles_cursor
31>             FETCH NEXT FROM titles_cursor INTO
32>                 @title_id2, @title
33>
34>             WHILE (@@FETCH_STATUS=0)
35>                 BEGIN
36>                 
37>                 IF (@title_id=@title_id2)
38>                     SELECT @au_id, @au_lname, @title
39>
40>                 FETCH NEXT FROM titles_cursor INTO
41>                     @title_id2, @title
42>                 END
43>                 CLOSE titles_cursor
44>             END
45>         FETCH NEXT FROM au_titles INTO @au_id2, @title_id
46>         END
47>
48>     CLOSE au_titles
49>     FETCH NEXT FROM au_cursor INTO @au_id, @au_lname
50>     END
51> CLOSE au_cursor
52>
53> DEALLOCATE titles_cursor
54> DEALLOCATE au_titles
55> DEALLOCATE au_cursor
56> GO

----------- ---------------------------------------- --------------------------------------------------------------------------------
1           Joe                                      The

----------- ---------------------------------------- --------------------------------------------------------------------------------
1           Joe                                      The

----------- ---------------------------------------- --------------------------------------------------------------------------------
1           Joe                                      The

----------- ---------------------------------------- --------------------------------------------------------------------------------
2           Jack                                     Emotional

----------- ---------------------------------------- --------------------------------------------------------------------------------
2           Jack                                     Emotional

----------- ---------------------------------------- --------------------------------------------------------------------------------
2           Jack                                     Emotional

----------- ---------------------------------------- --------------------------------------------------------------------------------
3           Pink                                     Prolonged

----------- ---------------------------------------- --------------------------------------------------------------------------------
3           Pink                                     Prolonged

----------- ---------------------------------------- --------------------------------------------------------------------------------
3           Pink                                     Prolonged

----------- ---------------------------------------- --------------------------------------------------------------------------------
4           Blue                                     With

----------- ---------------------------------------- --------------------------------------------------------------------------------
4           Blue                                     With

----------- ---------------------------------------- --------------------------------------------------------------------------------
4           Blue                                     With

----------- ---------------------------------------- --------------------------------------------------------------------------------
5           Red                                      Valley

----------- ---------------------------------------- --------------------------------------------------------------------------------
5           Red                                      Valley

----------- ---------------------------------------- --------------------------------------------------------------------------------
5           Red                                      Valley

----------- ---------------------------------------- --------------------------------------------------------------------------------
6           Black                                    Any?

----------- ---------------------------------------- --------------------------------------------------------------------------------
6           Black                                    Any?

----------- ---------------------------------------- --------------------------------------------------------------------------------
6           Black                                    Any?

----------- ---------------------------------------- --------------------------------------------------------------------------------
7           White                                    Fifty

----------- ---------------------------------------- --------------------------------------------------------------------------------
7           White                                    Fifty

----------- ---------------------------------------- --------------------------------------------------------------------------------
7           White                                    Fifty
1>
18. 2. Declare Cursor
18. 2. 1. The syntax of the DECLARE CURSOR statement
18. 2. 2. A DECLARE CURSOR statement that declares a dynamic local cursor
18. 2. 3. A cursor created in SQL server.
18. 2. 4. INSENSITIVE Cursor
18. 2. 5. Cursor on a Single-Column Key
18. 2. 6. Four cursors
18. 2. 7. Declare a cursor variable to hold the cursor output variable
18. 2. 8. Local scroll cursor
18. 2. 9. DECLARE CURSOR FAST_FORWARD FOR
18. 2. 10. DECLARE cursor LOCAL
18. 2. 11. DECLARE CURSOR GLOBAL FOR
18. 2. 12. Static cursor
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