mysql - Delete characters if the row size more than 9-characters -


i have more 12000 rows in sql table , want delete exceed characters row if contains more 9 character.

before:

id----title 1-----great day summer

after:

id----title 1-----great day

use substring first 9 characters.

update tablename set title = substring(title,1,9)

you can add clause make sure long values updated, keep transaction size down:

update tablename set title = substring(title,1,9) length(title) > 9

(is length mysql?)


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