SQL Server/T-SQL Tutorial/Math Functions/ROUND

Rounding present value to two decimal places.

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4> 5> 6> SELECT ROUND(1464*(1/POWER((1+.10),4)),2) 7> GO

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    1002.740000000000000000000000000000

(1 rows affected) 1></source>

ROUND(salary *

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3> CREATE TABLE employee( 4> id INTEGER NOT NULL PRIMARY KEY, 5> first_name VARCHAR(10), 6> last_name VARCHAR(10), 7> salary DECIMAL(10,2), 8> start_Date DATETIME, 9> region VARCHAR(10), 10> city VARCHAR(20), 11> managerid INTEGER 12> ); 13> 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

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---------- ---------- ------------ ----------------------- ---------- -------------------- -----------

         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> UPDATE Employee 4> SET salary = ROUND(salary * 1.1, 2) 5> GO (9 rows affected) 1> 2> select * from employee; 3> GO id first_name last_name salary start_Date region city managerid

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---------- ---------- ------------ ----------------------- ---------- -------------------- -----------

         1 Jason      Martin          6479.00 2005-03-22 00:00:00.000 North      Vancouver                      3
         2 Alison     Mathews         5267.90 2003-07-21 00:00:00.000 South      Utown                          4
         3 James      Smith           7345.80 2001-12-01 00:00:00.000 North      Paris                          5
         4 Celia      Rice            6123.70 2006-03-03 00:00:00.000 South      London                         6
         5 Robert     Black           4913.70 2004-07-02 00:00:00.000 East       Newton                         7
         6 Linda      Green           7101.60 2002-05-19 00:00:00.000 East       Calgary                        8
         7 David      Larry           5879.50 2008-03-18 00:00:00.000 West       New York                       9
         8 James      Cat             4657.40 2007-07-17 00:00:00.000 West       Regina                         9
         9 Joan       Act             6735.30 2001-04-16 00:00:00.000 North      Toronto                       10

(9 rows affected) 1> 2> 3> drop table employee; 4> GO 1></source>

Rounds a value to the number of decimal places specified in the second parameter.

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ROUND(number_to_round, number_ of_places,[0|1]) A numeric of anything but 0 will mean the number is truncated. 9> 10> SELECT ROUND(100.345678,5,0) 11> GO

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100.345680

(1 rows affected) 1> SELECT ROUND(100.345678,5,1) 2> GO

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100.345670

(1 rows affected) 1> SELECT ROUND(107.345678,-1,0) 2> GO

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110.000000

(1 rows affected)</source>

select ROUND(12.4999,0)

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3> select ROUND(12.4999,0) 4> GO

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12.0000

(1 rows affected) 1> 2></source>

select ROUND(12.4999,1)

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4> select ROUND(12.4999,1) 5> GO

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12.5000

(1 rows affected) 1> 2></source>

select ROUND(12.4999,-1) (Minus)

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4> select ROUND(12.4999,-1) 5> GO

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10.0000

(1 rows affected) 1></source>

select ROUND(12.5,0)

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5> select ROUND(12.5,0) 6> GO

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13.0

(1 rows affected) 1></source>

select ROUND(12.5,0,1)

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3> select ROUND(12.5,0,1) 4> GO

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12.0

(1 rows affected) 1></source>

SELECT ROUND(3. RoundedNumber

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3> 4> SELECT ROUND(3.22245, 3) RoundedNumber 5> GO RoundedNumber

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     3.22200

(1 rows affected)</source>