SQL SET (Operator)

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I was wondering if you can use SET to universally edit a file if the name contains a specific value.

 

Ex.

UPDATE *
SET *=value
WHILE *.contains(this_value)

 

I don't know how else to explain it. Basically, I want to open every table, and only edit the variables if it contains this_value.

 

 

Any help is greatly appreciated!