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I'm attempting to copy just the numeric portion of a street address into a new table using the Field Calculator in QGIS. The expression I'm trying to use is:

left( "SITE_ADDR", strpos( "SITE_ADDR", " " ) -1)

strpos is giving an invalid expression error- column " " not found.

Is there another way to format this expression to actually work?

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    What does your site_addr value look like? – Nathan W Nov 25 '14 at 22:57
  • Can you give examples of the 'from' data? – Michael Stimson Nov 25 '14 at 22:59
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I believe your expression should be:

left( "SITE_ADDR", strpos( "SITE_ADDR", ' ' ))

Note single quotes around string, do not need to minus 1.

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