


Getting Auto-Increment IDs from Bulk Inserts in MySQL
One of the common tasks in database management is inserting multiple rows into a table and retrieving the auto-increment IDs generated for each row. While retrieving the last inserted ID is straightforward using the LAST_INSERT_ID() function, bulk insertions pose a challenge in obtaining an array of all generated IDs.
Traditional Method: Insertion Throgh a Temporary Table
Previously, a common technique involved inserting the new IDs into a temporary table and using a subquery to retrieve them. However, this approach requires additional steps and introduces performance overhead.
Using LAST_INSERT_ID() and ROW_COUNT() with InnoDB
Recent versions of MySQL, particularly those utilizing the InnoDB storage engine, provide an alternative method for retrieving bulk insert IDs. This method leverages the LAST_INSERT_ID() function along with ROW_COUNT() to extract the range of auto-increment values assigned.
Procedure:
- Configure the innodb_autoinc_lock_mode system variable to 0 (traditional) or 1 (consecutive). This ensures that auto-increment values are assigned sequentially for bulk inserts.
- Execute the bulk insert statement.
- Retrieve the first ID from LAST_INSERT_ID().
- Calculate the last ID by adding ROW_COUNT() - 1 to the first ID.
Example:
INSERT INTO `my_table` (`name`, `email`) VALUES ('John Doe', 'john.doe@example.com'), ('Jane Doe', 'jane.doe@example.com'), ('Peter Jones', 'peter.jones@example.com'); SET @first_id = LAST_INSERT_ID(); SET @last_id = @first_id + ROW_COUNT() - 1; SELECT * FROM `my_table` WHERE `id` BETWEEN @first_id AND @last_id;
Benefits:
- No temporary tables: Eliminates the need for additional insert and subquery operations.
- Improved performance: Provides a more efficient way to retrieve bulk insert IDs.
- Compatibility with InnoDB: Leverages the features of the InnoDB storage engine to ensure sequential ID assignment during bulk insertions.
The above is the detailed content of How to Efficiently Retrieve Auto-Increment IDs After Bulk Inserts in MySQL?. For more information, please follow other related articles on the PHP Chinese website!

This article explores optimizing MySQL memory usage in Docker. It discusses monitoring techniques (Docker stats, Performance Schema, external tools) and configuration strategies. These include Docker memory limits, swapping, and cgroups, alongside

This article addresses MySQL's "unable to open shared library" error. The issue stems from MySQL's inability to locate necessary shared libraries (.so/.dll files). Solutions involve verifying library installation via the system's package m

The article discusses using MySQL's ALTER TABLE statement to modify tables, including adding/dropping columns, renaming tables/columns, and changing column data types.

This article compares installing MySQL on Linux directly versus using Podman containers, with/without phpMyAdmin. It details installation steps for each method, emphasizing Podman's advantages in isolation, portability, and reproducibility, but also

This article provides a comprehensive overview of SQLite, a self-contained, serverless relational database. It details SQLite's advantages (simplicity, portability, ease of use) and disadvantages (concurrency limitations, scalability challenges). C

This guide demonstrates installing and managing multiple MySQL versions on macOS using Homebrew. It emphasizes using Homebrew to isolate installations, preventing conflicts. The article details installation, starting/stopping services, and best pra

Article discusses configuring SSL/TLS encryption for MySQL, including certificate generation and verification. Main issue is using self-signed certificates' security implications.[Character count: 159]

Article discusses popular MySQL GUI tools like MySQL Workbench and phpMyAdmin, comparing their features and suitability for beginners and advanced users.[159 characters]


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

SublimeText3 Mac version
God-level code editing software (SublimeText3)

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

Notepad++7.3.1
Easy-to-use and free code editor

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.
