如何在 MongoDB 中使用“Not Like”運算子?


為此,在 MongoDB 中使用 $not 運算子。為了理解這個概念,讓我們用文件建立一個集合。建立帶有文件的集合的查詢如下所示 -

> db.notLikeOperatorDemo.insertOne({"StudentName":"John Doe"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c8a29c393b406bd3df60dfc")
}
> db.notLikeOperatorDemo.insertOne({"StudentName":"John Smith"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c8a29cc93b406bd3df60dfd")
}
> db.notLikeOperatorDemo.insertOne({"StudentName":"John Taylor"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c8a29df93b406bd3df60dfe")
}
> db.notLikeOperatorDemo.insertOne({"StudentName":"Carol Taylor"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c8a2a1693b406bd3df60dff")
}
> db.notLikeOperatorDemo.insertOne({"StudentName":"David Miller"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c8a2a2693b406bd3df60e00")
}

在集合中使用 find() 方法顯示所有文件。查詢如下所示 -

> db.notLikeOperatorDemo.find().pretty();

以下是輸出 -

{ "_id" : ObjectId("5c8a29c393b406bd3df60dfc"), "StudentName" : "John Doe" }
{
   "_id" : ObjectId("5c8a29cc93b406bd3df60dfd"),
   "StudentName" : "John Smith"
}
{
   "_id" : ObjectId("5c8a29df93b406bd3df60dfe"),
   "StudentName" : "John Taylor"
}
{
   "_id" : ObjectId("5c8a2a1693b406bd3df60dff"),
   "StudentName" : "Carol Taylor"
}
{
   "_id" : ObjectId("5c8a2a2693b406bd3df60e00"),
   "StudentName" : "David Miller"
}

以下是使用 MongoDB 中 NOT LIKE 運算子的查詢 -

> db.notLikeOperatorDemo.find( { StudentName: { $not: /^John Taylor.*/ } } );

以下是輸出 -

{ "_id" : ObjectId("5c8a29c393b406bd3df60dfc"), "StudentName" : "John Doe" }
{ "_id" : ObjectId("5c8a29cc93b406bd3df60dfd"), "StudentName" : "John Smith" }
{ "_id" : ObjectId("5c8a2a1693b406bd3df60dff"), "StudentName" : "Carol Taylor" }
{ "_id" : ObjectId("5c8a2a2693b406bd3df60e00"), "StudentName" : "David Miller" }
You can use the following query also:
> db.notLikeOperatorDemo.find({StudentName: {$not: /John Taylor/}});
The following is the output:
{ "_id" : ObjectId("5c8a29c393b406bd3df60dfc"), "StudentName" : "John Doe" }
{ "_id" : ObjectId("5c8a29cc93b406bd3df60dfd"), "StudentName" : "John Smith" }
{ "_id" : ObjectId("5c8a2a1693b406bd3df60dff"), "StudentName" : "Carol Taylor" }
{ "_id" : ObjectId("5c8a2a2693b406bd3df60e00"), "StudentName" : "David Miller" }

更新於: 2019 年 7 月 30 日

1K+ 瀏覽量

開啟您的職業生涯

完成課程獲得認證

開始
廣告
© . All rights reserved.