在MongoDB中应使用什么实现MySQL LIKE语句？
要获取MySQLLIKE语句，请在MongoDB中使用REGEX。首先让我们创建一个包含文档的集合-
> db.likeInMongoDBDemo.insertOne({"Name" : "Sam"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd6922857806ebf1256f123")
}
> db.likeInMongoDBDemo.insertOne({"Name" : "John" });
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd6923157806ebf1256f124")
}
> db.likeInMongoDBDemo.insertOne({"Name" : "Scott"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd6924557806ebf1256f125")
}
> db.likeInMongoDBDemo.insertOne({"Name" : "Sean"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd6924f57806ebf1256f126")
}
> db.likeInMongoDBDemo.insertOne({"Name" : "Samuel"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd6925857806ebf1256f127")
}以下是在find()方法的帮助下显示集合中所有文档的查询-
> db.likeInMongoDBDemo.find().pretty();
这将产生以下输出-
{ "_id" : ObjectId("5cd6922857806ebf1256f123"), "Name" : "Sam" }
{ "_id" : ObjectId("5cd6923157806ebf1256f124"), "Name" : "John" }
{ "_id" : ObjectId("5cd6924557806ebf1256f125"), "Name" : "Scott" }
{ "_id" : ObjectId("5cd6924f57806ebf1256f126"), "Name" : "Sean" }
{ "_id" : ObjectId("5cd6925857806ebf1256f127"), "Name" : "Samuel" }以下是执行REGEX以匹配MongoDB中的MySQLLIKE语句的查询-
> db.likeInMongoDBDemo.find({"Name":{$regex:"Sam"}});这将产生以下输出-
{ "_id" : ObjectId("5cd6922857806ebf1256f123"), "Name" : "Sam" }
{ "_id" : ObjectId("5cd6925857806ebf1256f127"), "Name" : "Samuel" }