How can I execute multiple queries in a single MySQL transaction using PHP?

Executing Multiple Queries with PHP and MySQL

In MySQL, running multiple queries in succession can present challenges. The original question showcases this issue, as the user encounters difficulties merging multiple queries into a single result set. To address this problem, there are two main approaches:

Approach 1: Using mysqli_multi_query

The solution provided in the answer uses mysqli_multi_query() to execute multiple concatenated queries. The key steps involved are as follows:

1. Concatenate all the SQL statements into a single string, each separated by a semicolon.
2. Execute the concatenated query using mysqli_multi_query().
3. Loop through the result sets returned by mysqli_next_result() and store each result in a separate variable.
4. Fetch the rows from each result set using mysqli_fetch_array().

Approach 2: Executing Queries Separately

An alternative approach is to execute each query separately. This method requires executing each query using mysqli_query() and then fetching the results from each result set using mysqli_fetch_array().

Each approach has its own merits. mysqli_multi_query() is more efficient if all the queries need to be executed together and the results are needed immediately. Executing queries separately provides more flexibility and allows you to handle each result set independently.

By understanding these techniques, developers can effectively combine multiple queries in their PHP scripts to achieve complex data operations with MySQL.

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