如何在T-SQL中查找第一个出现的一个字符序列

Question

I would like to write a simple query to find the first occurrence of either ',' or ';' in a string within T-SQL. Is there any easy way to do this?

In other databases I would use a regular expression such as [,;] but these aren't available in T-SQL.

The only solution I can think of is to have a long list of nested if .. else statements but that doesn't appeal.

Answer 1

Try PATINDEX...

select patindex('%,%', my_column)
from my_table

Answer 2

I am vastly ignorant of T-SQL, but looking at Microsoft's documentation it seems like CHARINDEX will find the first occurrence of a single character (or in fact of any string), and you can just call it twice (once for , and once for ; ) and see which one occurs first. See: http://msdn.microsoft.com/en-US/library/ms186323%28v=sql.90%29.aspx .