LEFT

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Applies to

SQL Server
Azure Synapse Analytics

Description

Returns the right part of a character string with the specified number of characters. (RIGHT in Transact-SQL).

Sample Source Pattern

Syntax

LEFT ( character_expression , integer_expression )

Function used to emulate the behavior

function LEFT(string, index){
      if(index < 0){
          throw new RangeError('Invalid INDEX on LEFT function');
      }
      return string.slice( 0, index);
    }
  return LEFT(STR, INDEX);

Examples

Code:

IN -> SQLServer_01.sql

SELECT LEFT('John Smith', 5) AS FIRST_NAME;

Output:

FIRST_NAME|
----------+
John      |

Code:

CREATE OR REPLACE FUNCTION left_str(str varchar, index float)
RETURNS string
LANGUAGE JAVASCRIPT
AS
$$
    function LEFT(string, index){
      if(index < 0){
          throw new RangeError('Invalid INDEX on LEFT function');
      }
      return string.slice( 0, index);
    }
  return LEFT(STR, INDEX);
$$;
SELECT LEFT_STR('John Smith', 5) AS FIRST_NAME;

Output:

FIRST_NAME|
----------+
John      |

Known Issues

No issues were found.

No related EWIs.

PreviousFORMAT in JS NextLEN

Last updated 6 months ago

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Description

Sample Source Pattern

Syntax

Examples

Known Issues

Related EWIs