SQL Server正则表达式清除标记

Question

I have below HTML content in data:

outer text <span class="cssname">inner text to be removed along with tags</span> further text

I want to remove all specific tags along with inner text <span with class='cssname' , using regular expression in a query.

The expected output I like is:

'outer text further text'

Answer 1

Regular expressions aren't fully supported in SQL Server like in other languages. This will work for a single tag.

declare @var nvarchar(256) = N'outer text <span class="cssname">inner text to be removed along with tags</span> further text'

select 
    stuff(@var,charindex('<',@var),charindex('>',@var,charindex('</',@var)) - charindex('<',@var) + 1,'')

Answer 2

This way tweaks the HTML to create <content> elements from the regular text and casts the result as XML. This is done in the CROSS APPLY part.

The second step uses an XQuery to query the text in the <content> elements (thus stripping the <span> elements).

---

DECLARE @tt TABLE(t NVARCHAR(MAX));
INSERT INTO @tt(t)VALUES(N'outer text <span class="cssname">inner text to be removed along with tags</span> further text');

SELECT
    stripped=CAST(x.query('for $i in (/content) return $i/text()') AS NVARCHAR(MAX))
FROM
    @tt
    CROSS APPLY (
        SELECT
            x=CAST('<content>'+REPLACE(REPLACE(t,'<span','</content><span'),'/span>','/span><content>')+'</content>' AS XML)
    ) AS f

Result:

outer text  further text