Mongodb 基礎

A.Mongodb與mysql語句對比

	MongoDB	Mysql
查詢全部	movies.find(new Document())	SELECT * FROM movies
條件查詢	movies.Find(new Document { { "title", "Hello Esr" } });	SELECT * FROM movies WHERE title= 'foobar'
查詢數量	movies.Find(new Document { { "title", "測試2" } }).Documents.Count();	SELECT COUNT(*) FROM movies WHERE `title` = 'foobar'
數量範圍查詢	1, movies.Find(new Document().Add("$where", new Code("this.num > 50"))); 2, movies.Find(new Document().Add("num",  new Document().Add("$gt",50))); ($gt : > ; $gte : >= ; $lt : < ; $lte : <= ; $ne : !=) 3,movies.Find("this.num > 50"); 4,movies.Find(new Document().Add("$where",new Code("function(x){ return this.num > 50};")));	select * from movies where num > 50
分頁查詢	movies.Find(new Document()).Skip(10).Limit(20);	SELECT * FROM movies  limit 10,20
查詢排序語句	movies.Find(new Document()).Sort(new Document() { { "num", -1 } });	SELECT * FROM movies ORDER BY num DESC
查詢指定字段	movies.Find(new Document().Add("num", new Document().Add("$gt", 50)), 10, 0, new Document() { { "title", 1 } });	select title from movies where num > 50
插入語句	movies.Insert(new Document() { { "title", "測試" }, { "resuleData", DateTime.Now } });	INSERT INOT movies (`title`, `reauleDate`) values ('foobar',25)
刪除語句	movies.Remove(new Document() { { "title", "Hello Esr" } });	DELETE * FROM movies
更新語句	movies.Update(new Document() { { "title", "測試2" } }              , new Document() { { "title", "測試11111" } });	UPDATE movies SET `title` = ‘測試1111’ WHERE `title` = '測試1111'
Linq查詢	(from item in db.GetCollection("movies").Linq()                        where ((string)item["title"]).StartsWith("Esr")                        select item);	select * from movies where title li