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SQL CONVERT Function: Main Tips
- The CONVERT function is used to convert the data format.
- The CONVERT function can be useful for displaying time/date in different formats.
Syntax of Convert Function
Converts an expression of one data type to another
Example
CONVERT(data_type(length),expression,style)Theory is great, but we recommend digging deeper!
SQL CONVERT: Syntax Values
| Value | Description |
|---|---|
| data_type(length) | Defines the data type of the target (length is optional) |
| expression | Defines what the value has to be converted |
| style | Defines the format of the output for the time/date (see table below) |
SQL CONVERT: Style Values
| Without century | With century | Input/Output | Standard |
|---|---|---|---|
| - | 0 or 100 | mon dd yyyy hh:miAM (or PM) | Default |
| 1 | 101 | 1 = mm/dd/yy 101 = mm/dd/yyyy |
USA |
| 2 | 102 | 2 = yy.mm.dd 102 = yyyy.mm.dd |
ANSI |
| 3 | 103 | 3 = dd/mm/yy 103 = dd/mm/yyyy |
British/French |
| 4 | 104 | 4 = dd.mm.yy 104 = dd.mm.yyyy |
German |
| 5 | 105 | 5 = dd-mm-yy 105 = dd-mm-yyyy |
Italian |
| 6 | 106 | 6 = dd mon yy 106 = dd mon yyyy |
- |
| 7 | 107 | 7 = Mon dd, yy 107 = Mon dd, yyyy |
- |
| 8 | 108 | hh:mm:ss | - |
| - | 9 or 109 | mon dd yyyy hh:mi:ss:mmmAM (or PM) | Default + millisec |
| 10 | 110 | 10 = mm-dd-yy 110 = mm-dd-yyyy |
USA |
| 11 | 111 | 11 = yy/mm/dd 111 = yyyy/mm/dd |
Japan |
| 12 | 112 | 12 = yymmdd 112 = yyyymmdd |
ISO |
| - | 13 or 113 | dd mon yyyy hh:mi:ss:mmm (24h) | Europe default + millisec |
| 14 | 114 | hh:mi:ss:mmm (24h) | - |
| - | 20 or 120 | yyyy-mm-dd hh:mi:ss (24h) | ODBC canonical |
| - | 21 or 121 | yyyy-mm-dd hh:mi:ss.mmm (24h) | ODBC canonical (with milliseconds) default for time, date, datetime2, and datetimeoffset |
| - | 126 | yyyy-mm-ddThh:mi:ss.mmm (no spaces) | ISO8601 |
| - | 127 | yyyy-mm-ddThh:mi:ss.mmmZ (no spaces) | ISO8601 with time zone Z |
| - | 130 | dd mon yyyy hh:mi:ss:mmmAM | Hijiri |
| - | 131 | dd/mm/yy hh:mi:ss:mmmAM | Hijiri |
SQL CONVERT: Example
This example uses the CONVERT() function for displaying information in different formats. In this case GETDATE() function is used.
Example
CONVERT(VARCHAR(19),GETDATE())
CONVERT(VARCHAR(10),GETDATE(),110)
CONVERT(VARCHAR(10),GETDATE(),10)
CONVERT(VARCHAR(11),GETDATE(),106)
CONVERT(VARCHAR(11),GETDATE(),6)
CONVERT(VARCHAR(24),GETDATE(),113)This is the result:
Dec 05 2016 10:29 PM
12-05-2016
12-05-16
05 Dec 2016
05 Dec 16
05 Dec 2016 10:29:69:359