MongoDB $gt 运算符（大于）2024 年 9 月 6 日 | 3 分钟阅读 MongoDB 中的 $gt 运算符是什么？MongoDB 提供了各种比较查询运算符。 $gt（大于）运算符是这些运算符之一。 $gt 运算符用于选择字段值大于给定值的所有文档。 您可以根据您的需求在（更新、查找、类似）方法中使用此运算符。 $gt 运算符的语法示例在下面的示例中，我们将使用 输出 >db.employee.find()
{
"_id" : 1,
"name" : "John",
"father_name" : "Thomas",
"department" : "Contain Writting",
"experience" : 2,
"mobile_no" : 9856321478,
"gender" : "Male",
"salary" : 22000,
"age" : 26
}
{
"_id" : 2,
"name" : "William",
"father_name" : "Rebort",
"department" : "Softwre Tester",
"experience" : 1,
"mobile_no" : 7896541478,
"gender" : "Male",
"salary" : 20000,
"age" : 21
}
{
"_id" : 3,
"name" : "Ava",
"father_name" : "William",
"department" : "Marketing manager",
"experience" : 5,
"mobile_no" : 8789654178,
"gender" : "Female",
"salary" : 36500,
"age" : 25
}
{
"_id" : 4,
"name" : "Olivia",
"father_name" : "Noah",
"department" : null,
"experience" : 4,
"mobile_no" : 9045641478,
"gender" : "Female",
"salary" : 30000,
"age" : 27
}
{
"_id" : 5,
"name" : "Elijah",
"father_name" : "John",
"department" : "HR",
"experience" : 0,
"mobile_no" : 6589741230,
"gender" : "Male",
"salary" : 15000,
"age" : 20
}
{
"_id" : 6,
"name" : "John",
"father_name" : "Liam",
"department" : "Softwre Tester",
"experience" : 10,
"mobile_no" : 9014536987,
"gender" : "Male",
"salary" : 55000,
"age" : 30
}
示例 1：使用 $gt 运算符 在本例中，我们正在查找那些薪资规模大于 20000 的文档。 输出 {
"_id" : 1,
"name" : "John",
"father_name" : "Thomas",
"department" : "Contain Writting",
"experience" : 2,
"mobile_no" : 9856321478,
"gender" : "Male",
"salary" : 22000,
"age" : 26
}
{
"_id" : 3,
"name" : "Ava",
"father_name" : "William",
"department" : "Marketing manager",
"experience" : 5,
"mobile_no" : 8789654178,
"gender" : "Female",
"salary" : 36500,
"age" : 25
}
{
"_id" : 4,
"name" : "Olivia",
"father_name" : "Noah",
"department" : null,
"experience" : 4,
"mobile_no" : 9045641478,
"gender" : "Female",
"salary" : 30000,
"age" : 27
}
{
"_id" : 6,
"name" : "John",
"father_name" : "Liam",
"department" : "Softwre Tester",
"experience" : 10,
"mobile_no" : 9014536987,
"gender" : "Male",
"salary" : 55000,
"age" : 30
}
示例 2：另一个字段 在本例中，我们正在查找年龄大于 25 的文档。 输出 {
"_id" : 1,
"name" : "John",
"father_name" : "Thomas",
"department" : "Contain Writting",
"experience" : 2,
"mobile_no" : 9856321478,
"gender" : "Male",
"salary" : 22000,
"age" : 26
}
{
"_id" : 4,
"name" : "Olivia",
"father_name" : "Noah",
"department" : null,
"experience" : 4,
"mobile_no" : 9045641478,
"gender" : "Female",
"salary" : 30000,
"age" : 27
}
{
"_id" : 6,
"name" : "John",
"father_name" : "Liam",
"department" : "Softwre Tester",
"experience" : 10,
"mobile_no" : 9014536987,
"gender" : "Male",
"salary" : 55000,
"age" : 30
}
示例 3：使用 $gt 运算符更新值 在本例中，我们正在更新那些工作经验超过 3 年的员工的薪资字段。 输出 {
"_id" : 3,
"name" : "Ava",
"father_name" : "William",
"department" : "Marketing manager",
"experience" : 5,
"mobile_no" : 8789654178,
"gender" : "Female",
"salary" : 50000,
"age" : 25
}
{
"_id" : 4,
"name" : "Olivia",
"father_name" : "Noah",
"department" : null,
"experience" : 4,
"mobile_no" : 9045641478,
"gender" : "Female",
"salary" : 50000,
"age" : 27
}
{
"_id" : 6,
"name" : "John",
"father_name" : "Liam",
"department" : "Softwre Tester",
"experience" : 10,
"mobile_no" : 9014536987,
"gender" : "Male",
"salary" : 50000,
"age" : 30
}
下一个主题MongoDB $gte 运算符 |
我们请求您订阅我们的新闻通讯以获取最新更新。
我们提供所有技术（如 Java 教程、Android、Java 框架）的教程和面试问题
G-13, 2nd Floor, Sec-3, Noida, UP, 201301, India
Python
Java
JavaScript
SQL
C
C++
HTML
CSS
React
Node.js
Spring Boot
C#
PHP
MySQL
MongoDB
AI
ML
DSA
DBMS
OS
Aptitude
Reasoning