How Can I Optimize MySQL INSERT Statements for Large Datasets?

Query Optimization: Inserting Data from One Table into Another in MySQL

Inserting data from one table to another is a common operation in SQL. However, when dealing with large datasets, it's crucial to optimize the query to avoid performance issues. Consider the following situation:

In this scenario, you want to insert data from the received_txts table into the action_2_members table. The query provided attempts to achieve this by first executing a subquery to gather the required data and then using the VALUES clause to insert it into the destination table.

However, a more efficient approach is to utilize a single INSERT statement with a nested subquery, as shown below:

INSERT INTO action_2_members (campaign_id, mobile, vote, vote_date)
SELECT campaign_id, from_number, received_msg, date_received
FROM `received_txts`
WHERE `campaign_id` = '8';

This optimized query leverages a nested subquery to retrieve the necessary data from the received_txts table and directly inserts it into the action_2_members table. By eliminating the need for an intermediate result set, this method offers significant performance improvements, particularly for large datasets.

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