SQL Server/T-SQL/Date Timezone/DATEADD

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Add 12 minutes to 24th March 1964

   <source lang="sql">

1> 2> -- Add 12 minutes to 24th March 1964 3> 4> SELECT DATEADD(mi,12,"24 March 1964") 5> 6> SELECT DATEADD(n,12,"24 March 1964") 7> GO

1964-03-24 00:12:00.000 (1 rows affected)

1964-03-24 00:12:00.000 (1 rows affected) 1> 

      </source>


Combine the CONVERT()and the DATEADD() functions to format a return date value nine months before September 8, 1989

   <source lang="sql">

1> 2> -- Combine the CONVERT()and the DATEADD() functions to format a return date value nine months before September 8, 1989: 5> 6> SELECT CONVERT(VarChar(20), DATEADD(m, -9, "9-8-1989"), 101) 7> GO

12/08/1988 (1 rows affected) 1> 

      </source>


DATEADD: add days to a date

   <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> INSERT INTO Employee (ID, Start_Date) 3> VALUES (99, DATEADD(day,-1,GETDATE())) 4> 5> select * from Employee 6> GO (1 rows affected) 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
        99 NULL              NULL 2006-10-08 15:42:09.670 NULL       NULL

(10 rows affected) 1> 2> drop table employee 3> GO 1> 

      </source>


DATEADD: add or subtract a number of days, months, or years from a specific date

   <source lang="sql">

1> 2> -- DATEADD: add or subtract a number of days, months, or years from a specific date. 3> 4> 5> -- Add 12 days to 24th March 1964 6> 7> SELECT DATEADD(dd,12,"24 March 1964") 8> 9> SELECT DATEADD(d,12,"24 March 1964") 10> GO

1964-04-05 00:00:00.000 (1 rows affected)

1964-04-05 00:00:00.000 (1 rows affected) 1> 

      </source>


DATEADD(Day, 90, "4-29-1988"): adds a specific number of date unit intervals to a date/time value

   <source lang="sql">

1> 2> -- DATEADD(): adds a specific number of date unit intervals to a date/time value. 3> 4> SELECT DATEADD(Day, 90, "4-29-1988") 5> GO

1988-07-28 00:00:00.000 (1 rows affected) 1> 2> 

      </source>


DATEADD(mi, -9000000, "4-30 AM"): 9,000,000 milliseconds before

   <source lang="sql">

1> 2> -- 9,000,000 milliseconds before: 3> 4> SELECT DATEADD(mi, -9000000, "4-29-1988 10:30 AM") 5> GO

1971-03-20 10:30:00.000 (1 rows affected) 1> 

      </source>


DATEADD(second, 9000, "4-30 AM"): 9,000 seconds after

   <source lang="sql">

1> -- 9,000 seconds after: 2> 3> SELECT DATEADD(second, 9000, "4-29-1988 10:30 AM") 4> GO

1988-04-29 13:00:00.000 (1 rows affected) 1> 

      </source>


DATEADD(year, 18, "4-30 AM"): 18 years later

   <source lang="sql">

1> 2> -- 18 years later: 3> 4> SELECT DATEADD(year, 18, "4-29-1988 10:30 AM") 5> GO

2006-04-29 10:30:00.000 (1 rows affected) 1> 2> 

      </source>


DATEADD(yy, -18, "4-30 AM"): 18 years before

   <source lang="sql">

1> 2> -- 18 years before: 3> 4> SELECT DATEADD(yy, -18, "4-29-1988 10:30 AM") 5> GO

1970-04-29 10:30:00.000 (1 rows affected) 1> 

      </source>


SELECT DATEADD(dayofyear, 18, "4-30 AM")

   <source lang="sql">

9> 10> 11> SELECT DATEADD(dayofyear, 18, "4-29-1988 10:30 AM") 12> GO

1989-10-29 10:30:00.000 (1 rows affected)

1988-05-17 10:30:00.000 (1 rows affected) 

</source>


SELECT DATEADD(hh,12,"24 March 1964"): Add 12 hours to 24th March 1964

   <source lang="sql">

1> -- Add 12 hours to 24th March 1964 2> 3> SELECT DATEADD(hh,12,"24 March 1964") 4> 5> GO

1964-03-24 12:00:00.000 (1 rows affected) 1> 

      </source>


SELECT DATEADD(m,12,"24 March 1964"): Add 12 months to 24th March 1964

   <source lang="sql">

1> -- Add 12 months to 24th March 1964 2> 3> SELECT DATEADD(m,12,"24 March 1964") 4> 5> SELECT DATEADD(mm,12,"24 March 1964") 6> GO

1965-03-24 00:00:00.000 (1 rows affected)

1965-03-24 00:00:00.000 (1 rows affected) 1> 

      </source>


SELECT DATEADD(mi, -30, "2005-30:00.000")

   <source lang="sql">

3> 4> SELECT DATEADD(mi, -30, "2005-09-01 23:30:00.000") 5> GO

2005-09-01 23:00:00.000 (1 rows affected) 

</source>


select DATEADD(month, -1, "2002-35:00")

   <source lang="sql">

2> 3> select DATEADD(month, -1, "2002-09-30 11:35:00") 4> GO

2002-08-30 11:35:00.000 (1 rows affected) 

</source>


SELECT DATEADD(quarter, 18, "4-30 AM")

   <source lang="sql">

3> 4> 5> SELECT DATEADD(quarter, 18, "4-29-1988 10:30 AM") 6> GO

1992-10-29 10:30:00.000 (1 rows affected) 

</source>


SELECT DATEADD(wk,12,"24 March 1964"): Add 12 weeks to 24th March 1964

   <source lang="sql">

1> -- Add 12 weeks to 24th March 1964 2> 3> SELECT DATEADD(wk,12,"24 March 1964") 4> 5> SELECT DATEADD(wk,12,"24 March 1964") 6> GO

1964-06-16 00:00:00.000 (1 rows affected)

1964-06-16 00:00:00.000 (1 rows affected) 1> 

      </source>


SELECT DATEADD(yy,12,"24 March 1964"): Add 12 years to 24th March 1964

   <source lang="sql">

1> -- Add 12 years to 24th March 1964 2> 3> SELECT DATEADD(yy,12,"24 March 1964") 4> 5> SELECT DATEADD(yyyy,12,"24 March 1964") 6> GO

1976-03-24 00:00:00.000 (1 rows affected)

1976-03-24 00:00:00.000 (1 rows affected) 1> 

      </source>
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