Update a table column based on existing columns

Question

Mysql database: I need to update a field in a table using another field in the same table. Example: My table TABLE1 contains two fields FIELD1 and FIELD2 . I need to do something along the line

UPDATE TABLE1 
SET FIELD1 = (SELECT CONCAT('xyz',`FIELD2`) FROM TABLE1)

I need to update the field for all the records. No conditions. I tried executing the query but got an error

You can't specify target table 'TABLE1' for update in FROM clause.

Can someone tell me how to go about it?

Answer 1

UPDATE TABLE1 
SET FIELD1 = concat('xyz', FIELD2)
where FIELD1 <> concat('xyz', FIELD2)

Answer 2

Is this what you mean?

UPDATE TABLE1 
SET FIELD1 = CONCAT('xyz',`FIELD2`)