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Test String is numeric

/ Published in: SQL
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  1. LENGTH(TRIM(TRANSLATE('123b', ' +-.0123456789',' '))); 	--would return 1
  2. LENGTH(TRIM(TRANSLATE('a123b', ' +-.0123456789',' '))); --would return 2
  3. LENGTH(TRIM(TRANSLATE('1256.54', ' +-.0123456789',' '))); --would return null
  4. LENGTH(TRIM(TRANSLATE ('-56', ' +-.0123456789',' '))); 	--would return null

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