How can I insert data into multiple MySQL tables simultaneously?

Inserting Data into Multiple MySQL Tables

Inserting data into multiple tables simultaneously can be a common requirement in database applications. One such scenario is inserting data into both the visits and registration tables, as outlined in the presented problem.

In MySQL, the INSERT statement is designed to insert data into a single table. To address the given requirement, two approaches can be considered:

1. Batch Execution of Multiple Queries:

This method involves writing separate INSERT queries for each table and executing them as a batch. Here's an example:

BEGIN;
INSERT INTO `visits` (visit_id, card_id) VALUES (NULL, 12131141);
INSERT INTO `registration` (registration_id, type, timestamp) VALUES (NULL, 'in', UNIX_TIMESTAMP());
COMMIT;

This ensures that both tables are updated atomically within a transaction.

2. Stored Procedure with Multiple Inserts:

Another option is to create a stored procedure that encapsulates the two INSERT statements. This allows for a single call to the procedure to insert data into both tables:

CREATE PROCEDURE insert_into_multiple_tables (IN card_id INT, IN registration_type ENUM('in', 'out'))
BEGIN
  INSERT INTO `visits` (visit_id, card_id) VALUES (NULL, card_id);
  INSERT INTO `registration` (registration_id, type, timestamp, visit_id) VALUES (NULL, registration_type, UNIX_TIMESTAMP(), LAST_INSERT_ID());
END

This procedure can then be called with the desired parameters to perform the desired insert operation.

Both of these approaches offer solutions to the problem of inserting data into multiple MySQL tables simultaneously. The choice between them depends on factors such as performance, code reusability, and transaction handling requirements.

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