Find and replace entire mysql database

Question

i would like to do a find and replace inside an entire database not just a table.

How can i alter the script below to work?

 update [table_name] set          


        

Answer 1

Update old URL to new URL in word-press mysql Query:

UPDATE wp_options SET option_value = replace(option_value, 'http://olddomain.com', 'http://newdomain.com') WHERE option_name = 'home' OR option_name = 'siteurl';

UPDATE wp_posts SET guid = replace(guid, 'http://olddomain.com','http://newdomain.com');

UPDATE wp_posts SET post_content = replace(post_content, 'http://olddomain.com', 'http://newdomain.com');

UPDATE wp_posts SET post_excerpt = replace(post_excerpt, 'http://olddomain.com', 'http://newdomain.com');

UPDATE wp_postmeta SET meta_value = replace(meta_value, 'http://olddomain.com', 'http://newdomain.com');

Answer 2

Short answer: You can't.

Long answer: You can use the INFORMATION_SCHEMA to get the table definitions and use this to generate the necessary UPDATE statements dynamically. For example you could start with this:

SELECT TABLE_NAME, COLUMN_NAME
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_SCHEMA = 'your_schema'

I'd try to avoid doing this though if at all possible.

Answer 3

I just wanted to share how I did this find/replace thing with sql database, because I needed to replace links from Chrome's sessionbuddy db file.

• So I exported sql database file as .txt file by using SQLite Database Browser 2.0 b1
• Find/replace in notepad++
• Imported the .txt file back on SQLite Database Browser 2.0 b1

Answer 4

Simple Soltion

UPDATE `table_name`
 SET `field_name` = replace(same_field_name, 'unwanted_text', 'wanted_text')

Answer 5

This strongly implies that your data IS NOT NORMALISED to begin with.

Something like this should work (NB you've not mentioned of your using any other languages - so its written as a MySQL stored procedure)

 create procedure replace_all(find varchar(255), 
        replce varchar(255), 
        indb varcv=char(255))
 DECLARE loopdone INTEGER DEFAULT 0;
 DECLARE currtable varchar(100);
 DECLARE alltables CURSOR FOR SELECT t.tablename, c.column_name 
    FROM information_schema.tables t,
    information_schema.columns c
    WHERE t.table_schema=indb
    AND c.table_schema=indb
    AND t.table_name=c.table_name;

 DECLARE CONTINUE HANDLER FOR NOT FOUND
     SET loopdone = 1;

 OPEN alltables;

 tableloop: LOOP
    FETCH alltables INTO currtable, currcol; 
    IF (loopdone>0) THEN LEAVE LOOP;
    END IF;
         SET stmt=CONCAT('UPDATE ', 
                  indb, '.', currtable, ' SET ',
                  currcol, ' = word_sub(\'', find, 
                  '\','\'', replce, '\') WHERE ',
                  currcol, ' LIKE \'%', find, '%\'');
         PREPARE s1 FROM stmt;
         EXECUTE s1;
         DEALLOCATE PREPARE s1;
     END LOOP;
 END //

I'll leave it to you to work out how to declare the word_sub function.

Answer 6

BE CAREFUL, when replacing with REPLACE command!

why?

because there is a great chance that your database contains serialized data (especially wp_options table), so using just "replace" might break data.

Use recommended serialization: https://puvox.software/tools/wordpress-migrator