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2025-02-24 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Internet Technology >
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This article focuses on "what are the characteristics of the mysql logo column", interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn what are the characteristics of the mysql logo column.
1. The identity column does not have to be matched with the primary key, but it is required to be key.
2. A table has at most one identity column.
3. The type of identity column can only be numeric.
With SET auto_increment_increment=3, the identity column can set the step size.
4. The starting value can be set by manual insertion.
Example
DROP TABLE IF EXISTS tab_id; CREATE TABLE tab_id (id INT PRIMARY KEY AUTO_INCREMENT,NAME VARCHAR (20)); INSERT INTO tab_id VALUES (NULL,'john'); # repeatable insert INSERT INTO tab_id (NAME) VALUES ('lucy'); SELECT * FROM tab_id; # since increasing the step size SET auto_increment_increment=3; so far, I believe you have a deeper understanding of "what are the characteristics of the mysql logo column". You might as well do it in practice! Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!
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