How to update/Change the date format to MM/dd/yyyy from dd/MM/yyyy format in sql server? - sql

Question

In my db DOB is saved in dd/mm/yyyy format. i want to change the DOB date format to MM/dd/yyyy. How can i do that?

Answer 1

First i want to know which datatype you are using for saving your date value. There is nothing provided with your code no sample code, table details nothing. anyway
i think your 'date of birth' field datatype is datetime,then you can use the following example
create table checktable(
ID int,
name nvarchar (30),
dob datetime);
Example data insert into the table
insert into checktable(ID,name,dob) values(10,'myname','03/01/2014');
//..........
select * from checktable
//Use CONVERT() it will give you the desired output
SELECT TOP 1 ID, dob,CONVERT(varchar,dob,101) 'mm/dd/yyyy'
FROM checktable
UPDATE
if your datatype is varchar and now it is in the format mm/dd/yyyy and you want to change it into dd/mm/yyyy format then use the following example it will help you
create table checktable1(
ID int,
name nvarchar (30),
dob varchar(20));
// insert sample data
insert into checktable1(ID,name,dob) values(10,'myname','21/05/2010');
select * from checktable1
// change the format using substring()
select * FROM checktable1
select dob,substring(dob,4,3)+substring(dob, 1, 3)+substring(dob, 7, 4) from checktable1
It will give you result in 05/21/2010 (mm/dd/yyyy)format

Answer 2

Microsoft SQL: https://msdn.microsoft.com/en-us/library/ms187928.aspx
Syntax for CONVERT:
CONVERT ( data_type [ ( length ) ] , expression [ , style ] )
use example:
SELECT CONVERT(VARCHAR(10), GETDATE(), 101) AS [MM/DD/YYYY]
For other databases search Date and Time Functions in documentation.

Answer 3

The CONVERT() function is a general function that converts an expression of one data type to another.
The CONVERT() function can be used to display date/time data in different formats.
http://www.w3schools.com/sql/func_convert.asp

Answer 4

if your data type is DateTime then no need to convert it, in later you can convert its format as you want but if your are using varchar or nvarchar
then you can use CONVERT() as below
SELECT convert(datetime, '23/10/2016', 103)
Result : 2016-10-23 00:00:00.000
if just want to conver in date then
SELECT convert(date, '23/10/2016', 103)
Result : 2016-10-23
for more information and other formats
http://www.sqlusa.com/bestpractices/datetimeconversion/
and if you just want to convert string to sting then
SELECT CONVERT(varchar,'23/10/2016',101)
Result : 23/10/2016

Answer 5

This is the query to show all data in dd/mm/yyyy format.Type your column name that contains date in place of datecolumnname and your table name in place of tablename in below query:
select convert(varchar,datecolumname,103) as datecolumname from tablename