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I will not talk about the concept of the stored procedure, because the search engine is more detailed and wonderful than me. I will only give an example to do more practical things. First, create a database sample and then use the following statement to create a table. Of course, you 'd better insert some data in the table. If you don't want it, you can. Call the added stored procedure first, and then call the Stored Procedure for deletion, modificati

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