[英]How to get critarea result with specific key and value from collection of mongo database?
讓我們假設,我們有一個名為posts 的集合
{
"_id": ObjectId("5146bb52d8524270060001f3"),
"post_text":"This is a sample post" ,
"user_name": "mark",
"post_privacy": "public",
"post_likes_count": 0
},
{
"_id": ObjectId("5146bb52d8524270060001f4"),
"post_text": "This is a sample post",
"user_name": "pramod",
"post_privacy": "public",
"post_likes_count": 0
}
讓我們假設我們在 mysql 中有相同的表。 我想對 mongo 的 sql 結果進行相同的查詢。
查詢是: select post_likes_count from posts where user_name="mark";
我們如何在 mongodb 中獲得相同的結果?
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