在MongoDB中使用LIKE查找匹配记录？
首先让我们创建一个包含文档的集合-
> db.likeDemo.insertOne({"Name":"John",Age:32});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cb84984623186894665ae41")
}
> db.likeDemo.insertOne({"Name":"Chris",Age:25});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cb84991623186894665ae42")
}
> db.likeDemo.insertOne({"Name":"Carol",Age:22});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cb849a1623186894665ae43")
}
> db.likeDemo.insertOne({"Name":"Johnny",Age:22});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cb849b2623186894665ae44")
}
> db.likeDemo.insertOne({"Name":"James",Age:27});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cb849bb623186894665ae45")
}以下是在find()方法的帮助下显示集合中所有文档的查询-
> db.likeDemo.find().pretty();
这将产生以下输出-
{
"_id" : ObjectId("5cb84984623186894665ae41"),
"Name" : "John",
"Age" : 32
}
{
"_id" : ObjectId("5cb84991623186894665ae42"),
"Name" : "Chris",
"Age" : 25
}
{
"_id" : ObjectId("5cb849a1623186894665ae43"),
"Name" : "Carol",
"Age" : 22
}
{
"_id" : ObjectId("5cb849b2623186894665ae44"),
"Name" : "Johnny",
"Age" : 22
}
{
"_id" : ObjectId("5cb849bb623186894665ae45"),
"Name" : "James",
"Age" : 27
}以下是MongoDB中的LIKE查询，显示以名称“Jo”开头的记录-
> db.likeDemo.find({Name: /^Jo/i } ).pretty();这将产生以下输出-
{
"_id" : ObjectId("5cb84984623186894665ae41"),
"Name" : "John",
"Age" : 32
}
{
"_id" : ObjectId("5cb849b2623186894665ae44"),
"Name" : "Johnny",
"Age" : 22
}