Remove HTML tags from Oracle

grammar

Oracle In the database REGEXP_REPLACE The syntax of the function is ：

REGEXP_REPLACE(source_char, pattern [, replace_string [, position [, occurrence [, match_parameter ] 

 -- to update oralce Remove the label from the historical data of the database and store it in the unlabeled field
update IAM_WORK_ITEM_CONTENT t set t.item_content_nolabel = regexp_replace(t.ITEM_CONTENT,'\s*|\t|\r|\n','')  ;
update IAM_WORK_ITEM_CONTENT t set t.item_content_nolabel = regexp_replace(t.item_content_nolabel,'<style[^>]*?>.*</style>','')  ;
update IAM_WORK_ITEM_CONTENT t set t.item_content_nolabel = regexp_replace(t.item_content_nolabel,'</?[^>]*>|nbsp;|&','')   ;