111 lines
2.2 KiB
Markdown
111 lines
2.2 KiB
Markdown
---
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title: SQL Server Convert Function
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---
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## SQL Server Convert Function
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Converts from one data type to another data type.
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### Covered in this guide :
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* Convert a decimal number to an integer
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* Convert a string to date
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* Convert a decimal number into string
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* Convert an integer number to decimal
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* convert a string to date in usa format style
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### Convert command Syntax
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```sql
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CONVERT (_New Data Type, Expression, Style_)
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```
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**New Data Type:** New data type to be converted too. For example: nvarchar, integer, decimal, date\
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**Expression:** Data to be converted.\
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**Style:** Format. For example: The style 110 is USA Date format mm-dd-yyyy\
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* ### Convert a Decimal Number to An Integer :
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```sql
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SELECT CONVERT(INT, 23.456) as IntegerNumber
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```
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Result :
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```text
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+---+---------------+
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| | IntegerNumber |
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+---+---------------+
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| 1 | 23 |
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+---+---------------+
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```
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Note: The result is truncated.
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* ### Convert a String to a Date :
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```sql
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SELECT CONVERT(DATE, '20161030') as Date
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```
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Result :
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```text
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+---+---------------+
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| | Date |
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+---+---------------+
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| 1 | 2016-10-30 |
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+---+---------------+
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```
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* ### Convert a Decimal to a String :
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```sql
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SELECT CONVERT(nvarchar, 20.123) as StringData
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```
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Result :
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```text
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+---+---------------+
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| | StringData |
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+---+---------------+
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| 1 | 20.123 |
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+---+---------------+
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```
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* ### Convert an Integer Number to a Decimal Number :
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```sql
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SELECT CONVERT(DECIMAL (15,3), 13) as DecimalNumber
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```
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Result :
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```text
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+---+---------------+
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| | DecimalNumber |
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+---+---------------+
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| 1 | 13.000 |
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+---+---------------+
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```
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* ### Convert a String to Date Format in USA Date Style :
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```sql
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SELECT CONVERT(DATE, '20171030' , 110) To_USA_DateFormat
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```
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Result :
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```text
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+---+-------------------+
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| | To_USA_DateFormat |
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+---+-------------------+
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| 1 | 2017-10-30 |
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+---+-------------------+
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```
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### More Information:
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- Information on Convert function: <a href='https://docs.microsoft.com/en-us/sql/t-sql/functions/cast-and-convert-transact-sql' target='_blank' rel='nofollow'>Microsoft</a>
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