为空则不限制
English translation: Leave blank to allow all
| 05:55 Feb 12, 2018 |
| Chinese to English translations [PRO] Computers: Software | |||||||
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|  Selected response from: Lincoln Hui Hong Kong Local time: 04:08 | ||||||
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| 4 +1 | Leave blank to allow all |
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| 4 | If it is empty. |
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| 4 | Passing null denotes no LIMIT clause |
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Answers
14 mins confidence: 
If it is empty. Explanation: If it is empty, it will not be restricted. PHP 判断变量是否为空empty() 函数简明现代魔法 www.nowamagic.net › PHP服务器脚本 Translate this page Jan 27, 2010 - 关于empty(). empty() 用于检查一个变量是否为空。如果变量是非空或非零的值，则empty() 返回FALSE。换句话说，""、0、"0"、NULL、FALSE、array()、var $var; 以及没有任何属性的对象都将被认为是空的，如果var 为空，则返回TRUE。 empty() 与isset() 的一个简单比较。 <?php $var = 0; // 结果为true，因为$var 为 ... |
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1 hr confidence: peer agreement (net): +1
peer agreement (net): +1Leave blank to allow all Explanation: AFAIK this is usually phrased differently in English. 1. Restricted IP addresses for push services. Leave blank to allow all (IP addresses). or even Deny IP list for push services. Leave blank to allow all. 2. IP addresses allowed to access. Leave blank to allow all (IP addresses). The following link may help you express this in English. https://www.epiphan.com/userguides/networked-VGA-Grid/Conten... |
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10 hrs confidence:
Passing null denotes no LIMIT clause Explanation: SQLiteDatabase中的query方法里的各个参数是干什么的_百度知道 zhidao.baidu.com/question/2010960903058731148.html Translate this page Sep 22, 2016 - Passing null will use the default sort order, which may be unordered.(排序方式，为空则为默认排序方式) limit. Limits the number of rows returned by the query, formatted as LIMIT clause. Passing null denotes no LIMIT clause.(限制返回的记录的条数，为空则不限制). 本回答由电脑网络分类达人董辉推荐. -------------------------------------------------- Note added at 10 hrs (2018-02-12 16:03:01 GMT) -------------------------------------------------- MySQL 字段约束null,not null,default,auto_increment | 小小子 www.xiaoxiaozi.com/2009/07/09/1111/comment-page-1/ Translate this page Jul 9, 2009 - NULL 和NOT NULL 修饰符：. 可以在每个字段后面都加上这NULL 或NOT NULL 修饰符来指定该字段是否可以为空(NULL)，还是说必须填上数据(NOT NULL)。MySQL默认情况下指定字段为NULL修饰符，如果一个字段指定为NOT NULL，MySQL则不允许向该字段插入空值(这里面说的空值都为NULL)，因为这是“龟 ... MySQL 中的SQL - 后端- 掘金 https://juejin.im/entry/592bd77844d9040064409515 Translate this page May 29, 2017 - CREATE TABLE t6(id SMALLINT UNSIGNED AUTO_INCREMENT PRIMARY KEY, username VARCHAR(20) NOT NULL UNIQUE KEY, sex ENUM('1', ... 空值与非空值. NULL，字段值可以为空。 NOT NULL，字段值禁止为空。不存在表级约束。 ... NO ACTION：标准SQL的关键字，在MySQL中与RESTRICT相同。 |
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