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This article mainly introduces mysql how to modify the field online, the article is very detailed, has a certain reference value, interested friends must read it!

You can modify the table structure online by using pt-online-schema-change

Pt-online-schema-change-- user=dba-- password=jsrh2sdshj-- host=192.168.27.21-- alter= "MODIFY COLUMN begin_date timestamp NOT NULL ON UPDATE CURRENT_TIMESTAMP" dazzling huisoumt blinds productsale-- execute

Pt-online-schema-change-- user=root-- password=cG3sBD9mazGI-- alter= "MODIFY COLUMN begin_date timestamp NOT NULL DEFAULT''ON UPDATE CURRENT_TIMESTAMP"-- execute Drunhuisou, execute Drunhuisou, tweets, blinds, products, sales

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