如何在MySQL中运行更新查询并替换匹配的字符串

Question

I tried a couple of things but it deleted the complete content from the column.

Here's what I want to do - A particular table [abc_tablename] in my MySQL database has a column [xyz_columnname] that has a lot of email IDs (more than 5000) and I want them to replace all the email IDs with a text [email ID removed]

I used the following query for SELECT:

SELECT * 
  FROM abc_tablename
 WHERE xyz_columnname LIKE '%@%'

How do I perform the replace function in this case? Can you help me with the query for the same. I tried this but it removed all the data from xyz_columnname

UPDATE abc_tablename 
   SET xyz_columnname = REPLACE (  xyz_columnname,  LIKE ''%@%'',  '**email ID removed**');

I'm using PHPMyAdmin to run these queries. Also, do note that xyz_columnname has a lot of text and numeric content along with the email ID.

Answer 1

You can simply use this command, this will update all rows which column xyz_columnname contains an @ to show email ID Removed

UPDATE abc_tablename 
    SET `xyz_columnname` = 'email ID removed'
    WHERE `xyz_columnname` LIKE '%@%'

Use ` (backquotes) for column name

Use ' or " for values

Don't use backticks with column values. use either single or double quotes otherwise mysql will consider that value as a column name.