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LTRIM (Azure Stream Analytics)

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Removes any white-space characters from the start of a string - from the left : LEFT TRIM.

Note

This behavior differs from the LTRIM function of T-SQL, that only removes the space character (char(32))

Syntax

LTRIM ( string_expression )

Arguments

string_expression

Is the string expression to be evaluated. string_expression can be a constant or column of type nvarchar(max).

Return Types

nvarchar(max)

Remarks

White-space characters are the following Unicode characters:

  • Members of the UnicodeCategory.SpaceSeparator category, which includes the characters SPACE (U+0020), NO-BREAK SPACE (U+00A0), OGHAM SPACE MARK (U+1680), EN QUAD (U+2000), EM QUAD (U+2001), EN SPACE (U+2002), EM SPACE (U+2003), THREE-PER-EM SPACE (U+2004), FOUR-PER-EM SPACE (U+2005), SIX-PER-EM SPACE (U+2006), FIGURE SPACE (U+2007), PUNCTUATION SPACE (U+2008), THIN SPACE (U+2009), HAIR SPACE (U+200A), NARROW NO-BREAK SPACE (U+202F), MEDIUM MATHEMATICAL SPACE (U+205F), and IDEOGRAPHIC SPACE (U+3000).
  • Members of the UnicodeCategory.LineSeparator category, which consists solely of the LINE SEPARATOR character (U+2028).
  • Members of the UnicodeCategory.ParagraphSeparator category, which consists solely of the PARAGRAPH SEPARATOR character (U+2029).
  • The characters CHARACTER TABULATION (U+0009), LINE FEED (U+000A), LINE TABULATION (U+000B), FORM FEED (U+000C), CARRIAGE RETURN (U+000D), and NEXT LINE (U+0085).

Examples


SELECT
  LTRIM( '      Left test' ) AS trimmedTest
FROM Input

Returns:

trimmedTest
Left test

See Also