SQL server uses convert to obtain datetime date data

SQL server uses convert to obtain datetime date data. The following examples include conversions of various date formats.
Statement and query result:
Select
CONVERT (varchar (100), GETDATE (), 0): 05 16 2006 AM
Select
CONVERT (varchar (100), GETDATE (), 1): 05/16/06
Select CONVERT (varchar (100 ),
GETDATE (), 2): 06.05.16
Select CONVERT (varchar (100), GETDATE (), 3 ):
16/05/06
Select CONVERT (varchar (100), GETDATE (), 4): 16.05.06
Select
CONVERT (varchar (100), GETDATE (), 5): 16-05-06
Select CONVERT (varchar (100 ),
GETDATE (), 6): 16 05 06
Select CONVERT (varchar (100), GETDATE (), 7): 05 16,
06
Select CONVERT (varchar (100), GETDATE (), 8): 10:57:46
Select
CONVERT (varchar (100), GETDATE (), 9): 05 16 2006 10: 57: 46: 827AM
Select
CONVERT (varchar (100), GETDATE (), 10): 05-16-06
Select CONVERT (varchar (100 ),
GETDATE (), 11): 16/06/05
Select CONVERT (varchar (100), GETDATE (), 12 ):
060516
Select CONVERT (varchar (100), GETDATE (), 13): 16 05 2006
10: 57: 46: 937
Select CONVERT (varchar (100), GETDATE (), 14 ):
10: 57: 46: 967
Select CONVERT (varchar (100), GETDATE (), 20 ):
10:57:47
Select CONVERT (varchar (100), GETDATE (), 21 ):
10:57:47. 157
Select CONVERT (varchar (100), GETDATE (), 22): 05/16/06 10:57:47
AM
Select CONVERT (varchar (100), GETDATE (), 23 ):
Select
CONVERT (varchar (100), GETDATE (), 24): 10:57:47
Select CONVERT (varchar (100 ),
GETDATE (), 25): 2006-05-16 10:57:47. 250
Select CONVERT (varchar (100 ),
GETDATE (), 100): 05 16 2006 AM
Select CONVERT (varchar (100), GETDATE (),
101): 05/16/2006
Select CONVERT (varchar (100), GETDATE (), 102 ):
2006.05.16
Select CONVERT (varchar (100), GETDATE (), 103): 16/05/2006
Select
CONVERT (varchar (100), GETDATE (), 104): 16.05.2006
Select
CONVERT (varchar (100), GETDATE (), 105): 16-05-2006
Select
CONVERT (varchar (100), GETDATE (), 106): 16 05 2006
Select
CONVERT (varchar (100), GETDATE (), 107): 05 16,200 6
Select
CONVERT (varchar (100), GETDATE (), 108): 10:57:49
Select CONVERT (varchar (100 ),
GETDATE (), 109): 05 16 2006 10: 57: 49: 437AM
Select CONVERT (varchar (100 ),
GETDATE (), 110): 05-16-2006
Select CONVERT (varchar (100), GETDATE (), 111 ):
2006/05/16
Select CONVERT (varchar (100), GETDATE (), 112): 20060516
Select
CONVERT (varchar (100), GETDATE (), 113): 16 05 2006 10: 57: 49: 513
Select
CONVERT (varchar (100), GETDATE (), 114): 10: 57: 49: 547
Select
CONVERT (varchar (100), GETDATE (), 120): 10:57:49
Select
CONVERT (varchar (100), GETDATE (), 121): 10:57:49. 700
Select
CONVERT (varchar (100), GETDATE (), 126): 2006-05-16T10: 57: 49.827
Select
CONVERT (varchar (100), GETDATE (), 130): 18 ???? ?????? 1427
10: 57: 49: 907AM
Select CONVERT (varchar (100), GETDATE (), 131): 18/04/1427
10: 57: 49: 920AM

Note:
Use CONVERT:

CONVERT (data_type [(length)], expression [, style])

Parameters
Expression

Is any valid Microsoft SQL Server expression ..

Data_type

The data types provided by the target system, including bigint and SQL _variant. User-Defined data types cannot be used.
Length

Optional parameters of the nchar, nvarchar, char, varchar, binary, or varbinary data type.

Style

Datetime or smalldatetime
Convert data to character data (nchar, nvarchar, char, varchar, nchar, or nvarchar data type) or string format style to convert
Float, real, money, or smallmoney data is converted to character data (nchar, nvarchar, char, varchar, nchar, or
Nvarchar data type ).

SQL Server supports the data format in the Arabic style using the Kuwait algorithm.

In the table, the two columns on the left represent converting datetime or smalldatetime to the style value of the character data. Add the style Value
100 to obtain the four-digit year (yyyy) of the century ).

Without Century digital (yy) with Century digital (yyyy)
Standard
Input/Output **
-0 or 100 (*) Default Value: mon dd yyyy
Hh: miAM (or PM)
1 101 us mm/dd/yyyy
2 102 ANSI yy. mm. dd
3 103 UK/France
Dd/mm/yy
4 104 German dd. mm. yy
5 105 Italian dd-mm-yy
6 106-dd mon yy

7 107-mon dd, yy
8 108-hh: mm: ss
-9 or 109 (*) Default Value + millisecond mon dd
Yyyy hh: mi: ss: mmmAM (or PM)
10 110 US mm-dd-yy
11 111 yy/mm/dd in Japan
12
112 ISO yymmdd
-13 or 113 (*) European default value + millisecond dd mon yyyy hh: mm: ss: mmm (24 h)

14 114-hh: mi: ss: mmm (24 h)
-20 or 120 (*) ODBC specification yyyy-mm-dd
Hh: mm: ss [. fff]
-21 or 121 (*) ODBC specifications (in milliseconds) yyyy-mm-dd hh: mm: ss [. fff]
-
126 (***) ISO8601 yyyy-mm-dd Thh: mm: ss. mmm (without spaces)
-130 * Hijri ***** dd mon yyyy
Hh: mi: ss: mmmAM
-131 * Hijri ***** dd/mm/yy hh: mi: ss: mmmAM

* The default value (style 0 or 100, 9 or 109, 13 or 113, 20 or 120, 21 or 121) always returns century digits
(Yyyy ).
** Input when converted to datetime; output when converted to character data.
* ** It is specially used for XML. For
Convert smalldatetime to character data. The output format is shown in the table. For
Character data conversion, the output is equivalent to style 2. For the conversion from real to character data, the output is equivalent to the style
1.
* *** Hijri is a calendar system with several variations. Microsoft SQL Server 2000 uses the Kuwait algorithm.

Important by default, SQL Server interprets two-digit years based on the end year 2049. That is, the year 49 with two digits is interpreted as 2049, and the year with two digits is 50.
It is interpreted as 1950. Many client applications (such as client applications based on OLE automation objects) Use 2030 as the end year. SQL Server
Provides a configuration option ("") to change the end year used by SQL Server and process the date in a consistent manner. However, the safest way is to specify a four-digit year.

When converting from smalldatetime to character data, the style that contains seconds or milliseconds will display zero at these locations. When
During value conversion, you can use an appropriate char or varchar data type length to truncate the date portion that is not needed.