mongodb not like 常用查询 关键词

查询的内容：

> db.ttt.find({},{url:1});

> db.ttt.find({"url":/guba.*/},{"url":1})
> db.ttt.find({"url":/blog.*/},{"url":1})
{ "_id" : ObjectId("5851f326aed7f6698e4cef3f"), "url" : "http://blog.sina.com.cn/s/blog_66dd17cd0102wqkx.html" }
{ "_id" : ObjectId("5851f73daed7f66c8c223f98"), "url" : "http://blog.sina.com.cn/s/blog_66dd17cd0102wqkx.html" }
{ "_id" : ObjectId("5852111baed7f6744d772de5"), "url" : "http://blog.sina.com.cn/s/blog_152ef1ab30102x176.html" }
{ "_id" : ObjectId("58522363aed7f675972cc275"), "url" : "http://blog.sina.com.cn/s/blog_98708c450102wz0c.html" }
{ "_id" : ObjectId("5852317daed7f6769385bc03"), "url" : "http://blog.sina.com.cn/s/blog_634ca6e10102x00j.html" }
{ "_id" : ObjectId("58525ba2aed7f679ac988d55"), "url" : "http://blog.sina.com.cn/s/blog_634ca6e10102x013.html" }

关键词过滤

> db.ttt.find({"content":/造假.*/},{"title":1,"content":1,url:1,"_id":0}).pretty()
{
"url" : "http://finance.sina.com.cn/stock/s/2016-12-17/doc-ifxytqav9608830.shtml",
"title" : "六家公司将被股民起诉 索赔维权工作全面启动",
"content" : "财信网(记者 许立婷)证监会近来对信息披露违法案件持续保持高压态势，对多家公司信息披露违法案件作出行政处罚决定。证券维权律师提醒投资者，公司收到处罚事先告知书，
}
{
"url" : "http://finance.sina.com.cn/stock/hkstock/2016-12-17/doc-ifxytqav9619564.shtml",
"title" : "辉山乳业否认浑水指控 称后者意在借机牟利",
"content" : "12月16日，中国最大的奶牛场运营商辉山乳业(06863.HK，下称辉山)被沽空机构浑水公司(Muddy Waters Research，下称浑水)狙击，被指公司价值接近零。当日晚间，针对浑水的
}

不包含  sina, blog

> db.ttt.find({"url":{$not:/sina.*/}},{"url":1})
{ "_id" : ObjectId("584823515cb5e3b055d422a1") }
{ "_id" : ObjectId("5848278dc36807fdbe71d575") }
{ "_id" : ObjectId("584fc5593f8af788e2490ab8") }

> db.ttt.find({"url":{$not:/blog.*/}},{"url":1})
{ "_id" : ObjectId("584823515cb5e3b055d422a1") }
{ "_id" : ObjectId("5848278dc36807fdbe71d575") }
{ "_id" : ObjectId("584fc5593f8af788e2490ab8") }
{ "_id" : ObjectId("584ff58daed7f629d03998b5"), "url" : "http://finance.sina.com.cn/stock/s/2016-12-13/doc-ifxypipt1260772.shtml" }
{ "_id" : ObjectId("584ff58daed7f629d03998b6"), "url" : "http://finance.sina.com.cn/roll/2016-12-13/doc-ifxypizk0434087.shtml" }
{ "_id" : ObjectId("584ff58daed7f629d03998b7"), "url" : "http://finance.sina.com.cn/stock/marketresearch/2016-12-13/doc-ifxypipu8010150.shtml" }
{ "_id" : ObjectId("584ff58daed7f629d03998b8"), "url" : "http://finance.sina.com.cn/stock/usstock/c/2016-12-13/doc-ifxypipu8009343.shtml" }
{ "_id" : ObjectId("584ff58daed7f629d03998b9"), "url" : "http://finance.sina.com.cn/stock/s/2016-12-13/doc-ifxypipu8009044.shtml" }