Cursor on a Single-Column Key : Declare Cursor « Cursor « SQL Server / T-SQL Tutorial






5> CREATE TABLE employee(
6>    id          INTEGER NOT NULL PRIMARY KEY,
7>    first_name  VARCHAR(10),
8>    last_name   VARCHAR(10),
9>    salary      DECIMAL(10,2),
10>    start_Date  DATETIME,
11>    region      VARCHAR(10),
12>    city        VARCHAR(20),
13>    managerid   INTEGER
14> );
15> GO
1> INSERT INTO employee VALUES (1, 'Jason' ,  'Martin', 5890,'2005-03-22','North','Vancouver',3);
2> GO

(1 rows affected)
1> INSERT INTO employee VALUES (2, 'Alison',  'Mathews',4789,'2003-07-21','South','Utown',4);
2> GO

(1 rows affected)
1> INSERT INTO employee VALUES (3, 'James' ,  'Smith',  6678,'2001-12-01','North','Paris',5);
2> GO

(1 rows affected)
1> INSERT INTO employee VALUES (4, 'Celia' ,  'Rice',   5567,'2006-03-03','South','London',6);
2> GO

(1 rows affected)
1> INSERT INTO employee VALUES (5, 'Robert',  'Black',  4467,'2004-07-02','East','Newton',7);
2> GO

(1 rows affected)
1> INSERT INTO employee VALUES (6, 'Linda' ,  'Green' , 6456,'2002-05-19','East','Calgary',8);
2> GO

(1 rows affected)
1> INSERT INTO employee VALUES (7, 'David' ,  'Larry',  5345,'2008-03-18','West','New York',9);
2> GO

(1 rows affected)
1> INSERT INTO employee VALUES (8, 'James' ,  'Cat',    4234,'2007-07-17','West','Regina',9);
2> GO

(1 rows affected)
1> INSERT INTO employee VALUES (9, 'Joan'  ,  'Act',    6123,'2001-04-16','North','Toronto',10);
2> GO

(1 rows affected)
1>
2> select * from employee;
3> GO
id          first_name last_name  salary       start_Date              region     city                 managerid
----------- ---------- ---------- ------------ ----------------------- ---------- -------------------- -----------
          1 Jason      Martin          5890.00 2005-03-22 00:00:00.000 North      Vancouver                      3
          2 Alison     Mathews         4789.00 2003-07-21 00:00:00.000 South      Utown                          4
          3 James      Smith           6678.00 2001-12-01 00:00:00.000 North      Paris                          5
          4 Celia      Rice            5567.00 2006-03-03 00:00:00.000 South      London                         6
          5 Robert     Black           4467.00 2004-07-02 00:00:00.000 East       Newton                         7
          6 Linda      Green           6456.00 2002-05-19 00:00:00.000 East       Calgary                        8
          7 David      Larry           5345.00 2008-03-18 00:00:00.000 West       New York                       9
          8 James      Cat             4234.00 2007-07-17 00:00:00.000 West       Regina                         9
          9 Joan       Act             6123.00 2001-04-16 00:00:00.000 North      Toronto                       10

(9 rows affected)
1>
2>
3> DECLARE
4>   @ID    int,
5>   @Count      int,
6>   @DateTime   datetime
7> SELECT                    -- initialize
8>   @Count    = 0,
9>   @DateTime = GETDATE ()
10> DECLARE c CURSOR FOR      -- set up cursor
11> SELECT
12>   ID
13> FROM
14>     Employee
15> OPEN c
16> FETCH c INTO              -- get first order
17>   @ID
18> WHILE @@FETCH_STATUS = 0  -- loop through orders
19> BEGIN
20>   SET
21>     @Count = @Count + 1   -- increment counter
22>   FETCH c INTO            -- pick up next order
23>     @ID
24> END
25> CLOSE c                   -- clean up
26> DEALLOCATE c
27> GO
1>
2>
3> drop table employee;
4> GO








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