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📜  更改表添加列和外键 mysql 代码示例

📅  最后修改于: 2022-03-11 15:04:55.435000             🧑  作者: Mango

代码示例1
ALTER TABLE database.table
  ADD COLUMN columnname INT DEFAULT(1),
  ADD FOREIGN KEY fk_name(fk_column) REFERENCES reftable(refcolumn) ON DELETE CASCADE;