数据结构
网络
RDBMS
操作系统
Java
MS Excel
iOS
HTML
CSS
Android
Python
C 编程
C++
C#
MongoDB
MySQL
Javascript
PHP
物理
化学
生物学
数学
英语
经济学
心理学
社会学
时尚研究
法律研究在 MongoDB 文档中查找带有特殊字符的字符串
若要在 MongoDB 文档中查找带有特殊字符的字符串，可以使用\。这里，我们的字符串中含有特殊字符$。
我们首先实现以下查询来创建带有文档的集合
>db.searchDocumentWithSpecialCharactersDemo.insertOne({"UserId":"Smith$John123","UserFirstName":"John","UserLastName":"Smith"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c987b98330fd0aa0d2fe4b1")
}
>db.searchDocumentWithSpecialCharactersDemo.insertOne({"UserId":"Taylor$Carol983","UserFirstName":"Carol","UserLastName":"Taylor"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c987bdb330fd0aa0d2fe4b2")
}
>db.searchDocumentWithSpecialCharactersDemo.insertOne({"UserId":"Doe$John999","UserFirstName":"John","UserLastName":"Doe"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c987bee330fd0aa0d2fe4b3")
}
>db.searchDocumentWithSpecialCharactersDemo.insertOne({"UserId":"Miller$David555","UserFirstName":"David","UserLastName":"Miller"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c987c01330fd0aa0d2fe4b4")
}以下是使用 find() 方法从集合中显示所有文档的查询
> db.searchDocumentWithSpecialCharactersDemo.find().pretty();
这将生成以下输出
{
"_id" : ObjectId("5c987b98330fd0aa0d2fe4b1"),
"UserId" : "Smith$John123",
"UserFirstName" : "John",
"UserLastName" : "Smith"
}
{
"_id" : ObjectId("5c987bdb330fd0aa0d2fe4b2"),
"UserId" : "Taylor$Carol983",
"UserFirstName" : "Carol",
"UserLastName" : "Taylor"
}
{
"_id" : ObjectId("5c987bee330fd0aa0d2fe4b3"),
"UserId" : "Doe$John999",
"UserFirstName" : "John",
"UserLastName" : "Doe"
}
{
"_id" : ObjectId("5c987c01330fd0aa0d2fe4b4"),
"UserId" : "Miller$David555",
"UserFirstName" : "David",
"UserLastName" : "Miller"
}以下是查找 MongoDB 文档中带有特殊字符的字符串的查询。这里，我们正在查找带有特殊字符$的字符串 John
> db.searchDocumentWithSpecialCharactersDemo.find({ UserId : /.*\$John.*/i }).pretty();这将生成以下输出
{
"_id" : ObjectId("5c987b98330fd0aa0d2fe4b1"),
"UserId" : "Smith$John123",
"UserFirstName" : "John",
"UserLastName" : "Smith"
}
{
"_id" : ObjectId("5c987bee330fd0aa0d2fe4b3"),
"UserId" : "Doe$John999",
"UserFirstName" : "John",
"UserLastName" : "Doe"
}
更新于：2019-07-30
2K+ 浏览次数
广告