Community Learn Tools Library Leisure
search
English
Home > Backend Development > PHP Tutorial > Is it better to set default to Null for a certain field in the database table, or '', or Empty String? On the mobile phone, I just want to return empty

Is it better to set default to Null for a certain field in the database table, or '', or Empty String? On the mobile phone, I just want to return empty

WBOY
Release： 2016-08-31 08:41:07
Original
1086 people have browsed it

When a certain field in the database is set to Null, the mobile terminal will return Null by default. If I want the mobile terminal to return null, I have to make a judgment.
1. If I want the mobile phone to return empty without making any judgment, how should I set the table field default?
2. Is it better to set the table field default to Null, "", or Empty String? Are they different?

Related labels：
c java javascript node.js php
source：php.cn
Previous article：What is the difference between using empty to determine whether a variable is empty in PHP and directly writing it in the if condition? Next article：How can I crawl the website more quickly and effectively?
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Latest Issues
PHP arrays obtained from URL parameters do not behave as expected I have a URL parameter that contains the category ID and I want to treat it as an array li...
From 2024-04-06 22:09:02
0
1
1428
Where should I place CustomLog directive in apache I'm using php:7.2-apachedocker. I need to disable health check url login access log. Based...
From 2024-04-06 22:03:59
0
1
990
What is the format of the variables in the return value? I am a new learner of php. I found a piece of code: if($x<time()){return[false,'error']...
From 2024-04-06 21:55:20
0
1
778
Problems encountered when using opentbs to generate odt files: values ​​of the same key are displayed in the same row instead of separate columns. I'm using a library called OpenTbs to create odt using PHP, I'm using it because columns a...
From 2024-04-06 20:18:18
0
1
483
Group MySQL results by ID for looping over I have a table with flight data in mysql. I'm writing a php code that will group and displ...
From 2024-04-06 17:27:56
0
1
406
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template