SQL CONVERT () function usage

CONVERT function format in SQL:

CONVERT (data_type, expression [, style])

Parameter description:

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

Date format style, which converts datetime or smalldatetime 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 to character data (nchar, nvarchar, char, varchar, nchar, or nvarchar data type ).

Remarks

The conversion time of a style number is as follows:

The conversion time of a style number is as follows:

 

Without Century Digital (yy)	Digital Century (yyyy)	Standard	Input/output **
-	0 or 100 (*)	Default value	Mon dd yyyy hh: miAM (or PM)
1	101	USA	Mm/dd/yyyy
2	102	ANSI	Yy. mm. dd
3	103	UK/France	Dd/mm/yy
4	104	Germany	Dd. mm. yy
5	105	Italy	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	USA	Mm-dd-yy
11	111	Japan	Yy/mm/dd
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 specifications	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 (excluding spaces)
-	130 *	Hijri ****	Dd mon yyyy hh: mi: ss: mmmAM
-	131 *	Hijri ****	Dd/mm/yy hh: mi: ss: mmmAM

CONVERT (data_type, expression_r_r [, style])

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): 06/05/16
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): 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:
This style is generally in the time type (datetime, smalldatetime) and string type (nchar, nvarchar, char, varchar)
It is used only when they are converted to each other.