MySQL：“DROP TABLE”是完全删除表还是只删除结构？

Question

I am under the impression that the MySQL command DROP TABLE User will just remove the data, columns, and relevant constraints. However, the table shell still exists. Is this correct?

Answer 1

Using DROP TABLE will remove the entire table and all records contained inside it. If you want to retain the table structure but remove all data, then consider using TRUNCATE TABLE . Truncating a table is implemented by dropping the entire table and then recreating it. This is faster than doing DELETE FROM yourTable , which removes records one-by-one.

Answer 2

After Drop Table , the table will not exist anymore, so no data and no table definition(which you called 'table shell'); TRUNCATE TABLE keep your table definition and delete all the data ,and reset table auto-increment as well, but be careful about TRUNCATE if the table size is huge, it will expand your tablespace and not easy to shrink.

Answer 3

As mysql manual on drop table says:

Be careful with this statement! It removes the table definition and all table data.

So, no shell (whatever that should mean) remains after dropping a table.

Answer 4

What do you mean by table shell?

From MqSQL dev site:

DROP TABLE removes one or more tables. You must have the DROP privilege for each table.

Be careful with this statement! It removes the table definition and all table data. For a partitioned table, it permanently removes the table definition, all its partitions, and all data stored in those partitions. It also removes partition definitions associated with the dropped table.