SQL Server/T-SQL/Math Functions/ROUND
Содержание
ROUND(100.345678,5,1)
<source lang="sql">
2> SELECT ROUND(100.345678,5,1)
3> GO
100.345670
(1 rows affected)
</source>
ROUND(107.345678,-1,0)
<source lang="sql">
2> SELECT ROUND(107.345678,-1,0) 3> GO
110.000000
(1 rows affected)
</source>
ROUND: Rounds a value to the number of decimal places specified in the second parameter
<source lang="sql">
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)
</source>
Round the updated data
<source lang="sql">
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>
</source>
select ROUND(12.4999,0)
<source lang="sql">
3> select ROUND(12.4999,0) 4> GO
12.0000
(1 rows affected) 1> 2>
</source>
select ROUND(12.4999,1)
<source lang="sql">
4> select ROUND(12.4999,1) 5> GO
12.5000
(1 rows affected) 1> 2>
</source>
select ROUND(12.4999,-1) (minus)
<source lang="sql">
4> select ROUND(12.4999,-1) 5> GO
10.0000
(1 rows affected) 1>
</source>
select ROUND(12.5,0)
<source lang="sql">
4> 5> select ROUND(12.5,0) 6> GO
13.0
(1 rows affected) 1>
</source>
select ROUND(12.5,0,1)
<source lang="sql">
3> select ROUND(12.5,0,1) 4> GO
12.0
(1 rows affected) 1>
</source>