Why does DROP PRIMARY KEY affects ALL table rows?

为什么删除主键会影响所有的表行吗？

youdao

To better illustrate the improvement in cardinality estimation, drop all the existing indexes on the EMPLOYEE table except the primary key index.

为了更好地解释说明基数估计值的提高，撤销除主键索引外的所有employee表上的现有索引。

youdao

Find the constraint name for the unique/primary key, disable the constraint and drop the tablespace again.

找到那些惟一/主键约束名，禁用这些约束然后再次删除表空间。

youdao