Shulou(Shulou.com)06/01 Report--

1. Create a tabl

two。 Query, delete, update, insert data operation

Query:

Delete: drop table ruozedata

Update:

Insert data:

3. Set constraint

Just create a new constraint in it, and the code can be found in it (you can find the code when you save the execution).

4. Delete data

Delete from ruozedata where name='yu'

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