Oracle Regex query for specific pattern -


could me in framing regex query filters following pattern among different pattern column.

pattern: firstname1 lastname1#firstname2 lastname2

eg: george david#william david

for below written query, firstname1 lastname1#firstname2 lastname2 alongwith name1#name2 patterns too.

query:

select column1 table regexp_like(column1, '(^|\s|\w)#($|\s|\w)');

the '(^|\s|\w)#($|\s|\w)' pattern matches start of string, whitespace, or non-word char, #, , end of string, whitespace, or non-word char. not restrict context here , match # inside string not enclosed word chars.

you need anchors , more specific pattern:

'^\w+\s+\w+#\w+\s+\w+$'

you may further adjust allow apostrophes or hyphens if necessary changing \w+ \w+([''-]\w+)* (1+ word chars followed 0+ sequences of ' or - followed 1+ word chars).

details

  • ^ - start of string
  • \w+ - 1 or more word chars
  • \s+ - 1 or more whitespaces
  • \w+ - 1 or more word chars
  • # - #
  • \w+\s+\w+ - see above
  • $ - end of string.

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