How to deal with mysql statements-php Tutorial

Mysql statement: a mysql deletion statement that deletes all URLs... for example, if an article contains a URL link, I want to delete all the URLs, www.baidu.com or www.baidu.com, and write the delete statement ------ solution ---------------- updatetables mysql statement
Could you tell me a mysql delete statement that deletes all URLs... for example, an article contains a URL link, I want to delete all the URLs, http://www.baidu.com or www.baidu.com to delete this delete statement in how to write

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Update table set fieldName = fieldName. str_replace...
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Delete records with URLs
Delete from table name where field name link '% www.baidu.com %'

Remove the URL from the content
Update table name set field name = field name. str_replace ('www .baidu.com ','')
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It's okay to replace the http://www.baidu.com.
Attention sequence:

SQL code

Update table name set field name = field name. str_replace (http://www.baidu.com ', '') update table name set field name = field name. str_replace (www.baidu.com ','')
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SQL code
   
   
Update table name set field name = field name. str_replace ('http: // www.baidu.com ', '') update table name set field name = field name. str_replace ('www .baidu.com ','')
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I learned it. Thank you .......