在MongoDB中为文本搜索创建索引
让我们创建一个包含文档的集合-
> db.demo331.insertOne({"Words":"This is a MySQL"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e521c35f8647eb59e562089")
}
> db.demo331.insertOne({"Words":"THIS is a MongoDB"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e521c36f8647eb59e56208a")
}在find()方法的帮助下显示集合中的所有文档-
> db.demo331.find();
这将产生以下输出-
{ "_id" : ObjectId("5e521c35f8647eb59e562089"), "Words" : "This is a MySQL" }
{ "_id" : ObjectId("5e521c36f8647eb59e56208a"), "Words" : "THIS is a MongoDB" }以下是为文本搜索创建索引的查询-
> db.demo331.createIndex( {Words: "text" } );
{
"createdCollectionAutomatically" : false,
"numIndexesBefore" : 1,
"numIndexesAfter" : 2,
"ok" : 1
}
> db.demo331.find({$text:{$search:"MySQL"}});这将产生以下输出-
{ "_id" : ObjectId("5e521c35f8647eb59e562089"), "Words" : "This is a MySQL" }热门推荐
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