SQL Server/T-SQL/Math Functions/ROUND
Содержание
ROUND(100.345678,5,1)
2> SELECT ROUND(100.345678,5,1)
3> GO
-----------
100.345670
(1 rows affected)
ROUND(107.345678,-1,0)
2> SELECT ROUND(107.345678,-1,0)
3> GO
-----------
110.000000
(1 rows affected)
ROUND: Rounds a value to the number of decimal places specified in the second parameter
2> -- ROUND: Rounds a value to the number of decimal places specified in the second parameter.
3>
4> -- ROUND(number_to_round, number_ of_places,[0|1])
5>
6> SELECT ROUND(100.345678,5,0)
7> GO
-----------
100.345680
(1 rows affected)
Round the updated data
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> --Round the updated data:
3>
4> UPDATE Employee
5> SET salary = ROUND(salary * 1.1, 2)
6> WHERE city LIKE "N%"
7> GO
(3 rows affected)
1>
2> select * from employee
3> GO
ID name salary start_date city region
----------- ---------- ----------- ----------------------- ---------- ------
1 Jason 44462 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 44682 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 99682 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> drop table employee
4> GO
1>
select ROUND(12.4999,0)
3> select ROUND(12.4999,0)
4> GO
--------
12.0000
(1 rows affected)
1>
2>
select ROUND(12.4999,1)
4> select ROUND(12.4999,1)
5> GO
--------
12.5000
(1 rows affected)
1>
2>
select ROUND(12.4999,-1) (minus)
4> select ROUND(12.4999,-1)
5> GO
--------
10.0000
(1 rows affected)
1>
select ROUND(12.5,0)
4>
5> select ROUND(12.5,0)
6> GO
-----
13.0
(1 rows affected)
1>
select ROUND(12.5,0,1)
3> select ROUND(12.5,0,1)
4> GO
-----
12.0
(1 rows affected)
1>