SQL Server/T-SQL/View/Alter View

Altering Views

 

SQL Server 2000 allows you to alter the definition of a view. The syntax is almost identical to the syntax for creating the view initially:
ALTER VIEW view_name [(column [,?n])]
[WITH ENCRYPTION]
AS
select_statement
[WITH CHECK OPTION]

Alter a view to change the view structure
26> CREATE TABLE authors(
27>    au_id          varchar(11),
28>    au_lname       varchar(40)       NOT NULL,
29>    au_fname       varchar(20)       NOT NULL,
30>    phone          char(12)          NOT NULL DEFAULT ("UNKNOWN"),
31>    address        varchar(40)           NULL,
32>    city           varchar(20)           NULL,
33>    state          char(2)               NULL,
34>    zip            char(5)               NULL,
35>    contract       bit               NOT NULL
36> )
37> 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)
(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>
3> CREATE VIEW authorlist (first, last, phone)
4> AS
5> SELECT au_fname, au_lname, phone
6> FROM authors
7> GO
1> GRANT SELECT ON authorlist (first, last) TO PUBLIC
2> GO
1>
2>
3> ALTER VIEW authorlist (phone, first, last)
4> AS
5> SELECT phone, au_fname, au_lname
6> FROM authors
7> GO
1>
2> drop VIEW authorlist;
3> GO
1>
2> drop table authors;
3> GO

The ALTER statement is issued with the revised view definition

1> create table employee(
2>     ID          int,
3>     name        nvarchar (10),
4>     salary      int,
5>     start_date  datetime,
6>     city        nvarchar (10),
7>     region      char (1))
8> GO
1>
2> insert into employee (ID, name,    salary, start_date, city,       region)
3>               values (1,  "Jason", 40420,  "02/01/94", "New York", "W")
4> GO
(1 rows affected)
1> insert into employee (ID, name,    salary, start_date, city,       region)
2>               values (2,  "Robert",14420,  "01/02/95", "Vancouver","N")
3> GO
(1 rows affected)
1> insert into employee (ID, name,    salary, start_date, city,       region)
2>               values (3,  "Celia", 24020,  "12/03/96", "Toronto",  "W")
3> GO
(1 rows affected)
1> insert into employee (ID, name,    salary, start_date, city,       region)
2>               values (4,  "Linda", 40620,  "11/04/97", "New York", "N")
3> GO
(1 rows affected)
1> insert into employee (ID, name,    salary, start_date, city,       region)
2>               values (5,  "David", 80026,  "10/05/98", "Vancouver","W")
3> GO
(1 rows affected)
1> insert into employee (ID, name,    salary, start_date, city,       region)
2>               values (6,  "James", 70060,  "09/06/99", "Toronto",  "N")
3> GO
(1 rows affected)
1> insert into employee (ID, name,    salary, start_date, city,       region)
2>               values (7,  "Alison",90620,  "08/07/00", "New York", "W")
3> GO
(1 rows affected)
1> insert into employee (ID, name,    salary, start_date, city,       region)
2>               values (8,  "Chris", 26020,  "07/08/01", "Vancouver","N")
3> GO
(1 rows affected)
1> insert into employee (ID, name,    salary, start_date, city,       region)
2>               values (9,  "Mary",  60020,  "06/09/02", "Toronto",  "W")
3> GO
(1 rows affected)
1>
2> select * from employee
3> GO
ID          name       salary      start_date              city       region
----------- ---------- ----------- ----------------------- ---------- ------
          1 Jason            40420 1994-02-01 00:00:00.000 New York   W
          2 Robert           14420 1995-01-02 00:00:00.000 Vancouver  N
          3 Celia            24020 1996-12-03 00:00:00.000 Toronto    W
          4 Linda            40620 1997-11-04 00:00:00.000 New York   N
          5 David            80026 1998-10-05 00:00:00.000 Vancouver  W
          6 James            70060 1999-09-06 00:00:00.000 Toronto    N
          7 Alison           90620 2000-08-07 00:00:00.000 New York   W
          8 Chris            26020 2001-07-08 00:00:00.000 Vancouver  N
          9 Mary             60020 2002-06-09 00:00:00.000 Toronto    W
(9 rows affected)
1>
2>
3> CREATE VIEW myView
4> AS
5> SELECT ID, Name
6> FROM Employee
7> GO
1>
2> select * from myView
3> GO
ID          Name
----------- ----------
          1 Jason
          2 Robert
          3 Celia
          4 Linda
          5 David
          6 James
          7 Alison
          8 Chris
          9 Mary
(9 rows affected)
1>
2> -- The ALTER statement is issued with the revised view definition:
3>
4> ALTER VIEW MyView
5> AS
6> SELECT ID, Name, Salary
7> FROM Employee
8> GO
1>
2> select * from myView
3> GO
ID          Name       Salary
----------- ---------- -----------
          1 Jason            40420
          2 Robert           14420
          3 Celia            24020
          4 Linda            40620
          5 David            80026
          6 James            70060
          7 Alison           90620
          8 Chris            26020
          9 Mary             60020
(9 rows affected)
1>
2>
3> drop table employee
4> GO
1>