Get the First and Last Word from a String or Sentence in SQL

You can use query below:

DECLARE @Sentence    VARCHAR(MAX) = 'The quick brown fox jumps over the lazy dog'

SELECT SUBSTRING(@Sentence, 1, CHARINDEX(' ', @Sentence) - 1) AS [First Word],
       REVERSE(SUBSTRING(REVERSE(@Sentence), 1, CHARINDEX(' ', REVERSE(@Sentence)) - 1)) AS [Last Word]

First Word   Last Word
------------ -----------
The          dog