SQL Server/T-SQL/Transact SQL/Continue

Continue statement Demo

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> -- BREAK exits the WHILE structure, resuming execution after the END statement.
3>
4> WHILE (SELECT AVG(Salary) FROM Employee) < $92000
5> BEGIN
6>     UPDATE Employee SET Salary = Salary * 1.25
7>     SELECT MAX(Salary) FROM Employee
8>     IF (SELECT MAX(Salary) FROM Employee) > $10000
9>     BEGIN
10>         PRINT "is too high, quit."
11>         BREAK
12>     END
13>     ELSE
14>     BEGIN
15>         PRINT "Continue to loop."
16>         CONTINUE
17>     END
18> END
19> PRINT "Done."
20> GO
(9 rows affected)
-----------
     113275
(1 rows affected)
is too high, quit.
(1 rows affected)
Done.
1>
2> drop table employee
3> GO
1>

CONTINUE stops only the current execution

24>
25> CREATE TABLE project   (project_no   CHAR(4) NOT NULL,
26>                         project_name CHAR(15) NOT NULL,
27>                         budget FLOAT NULL)
28>
29> insert into project values ("p1", "Search Engine",        120000.00)
30> insert into project values ("p2", "Programming",          95000.00)
31> insert into project values ("p3", "SQL",                  186500.00)
32>
33> select * from project
34> GO
(1 rows affected)
(1 rows affected)
(1 rows affected)
project_no project_name    budget
---------- --------------- ------------------------
p1         Search Engine                     120000
p2         Programming                        95000
p3         SQL                               186500
(3 rows affected)
1>
2> -- CONTINUE stops only the current execution
3>
4>
5> WHILE (SELECT SUM(budget) FROM project) < 500000
6> BEGIN
7>      UPDATE project SET budget = budget*1.1
8>         IF (SELECT MAX(budget) FROM project) > 240000
9>             BREAK
10>         ELSE
11>             CONTINUE
12> END
13>
14> select * from project
15> GO
(3 rows affected)
(3 rows affected)
(3 rows affected)
project_no project_name    budget
---------- --------------- ------------------------
p1         Search Engine                     159720
p2         Programming           126445.00000000004
p3         SQL                   248231.50000000009
(3 rows affected)
1>
2> drop table project
3> GO
1>