regex - How to compare Unicode characters in SQL server? -


hi trying find rows in database (sql server) have character é in text executing following queries.

select count(*) t_question patindex(n'%[\xe9]%',question) > 0;  select count(*) t_question patindex(n'%[\u00e9]%',question) > 0;

but found 2 problems: (a) both of them returning different number of rows , (b) returning rows not have specified character.

is way constructing regular expression , comparing unicode correct?

edit:

the question column stored using datatype nvarchar. following query gives correct result though.

select count(*) t_question question n'%é%';

why not use select count(*) t_question question n'%é%'?

nb: likeand patindex not accept regular expressions.

in sql server pattern syntax [\xe9] means match single character within specified set. i.e. match \, x, e or 9. of following strings match pattern.

  • "elephant"
  • "axis"
  • "99.9"

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