mongodb命令---花样查询语句

闲言少叙

查出价格低于200的商品信息----包含商品名称，货物编号，价格，添加信息等

db.goods.find(
{"shop_price":{$lt:}},
{"shop_price":,"goods_name":,"goods_id":,"add_time":}
)

商品分类不为3的商品

db.goods.find(

{"cat_id":{$ne:}},

{"shop_price":,"goods_name":,"goods_id":,"cat_id":}

)

价格低于或等于400的商品

db.goods.find(
{"shop_price":{$lte:}},
{"goods_name":,"goods_id":,"shop_price":,"cat_id":}
）

查处价格大于等于100，小于等于500的商品

db.goods.find(
{$and:
 [{"shop_price":{$lte:}},{"shop_price":{$gte:}}]
},
{"goods_name":,"goods_id":,"shop_price":,"cat_id":}
)

查询不属于栏目3和栏目11的产品用$and

db.goods.find(
{$and:
    [{cat_id:{$ne:}},{cat_id:{$ne:}}]
},
{"goods_name":,"goods_id":,"shop_price":,"cat_id":}
)

查询不属于栏目3和栏目11的产品用$nin

db.goods.find(
{"cat_id":{$nin:[,]}},
{"goods_name":,"goods_id":,"shop_price":,"cat_id":}
)

查询不属于栏目3和栏目11的产品用$nor

db.goods.find(
{$nor:[{cat_id:},{cat_id:}]},
{"goods_name":,"goods_id":,"shop_price":,"cat_id":}
)

取出大于100小于300的商品或者小于5000，大于4000的商品

db.goods.find(
{$or:[
{$and:[{"shop_price":{$lte:}},{"shop_price":{$gte:}},]},
{$and:[{"shop_price":{$lt:}},{"shop_price":{$gt:}},]}
]},
{"goods_name":,"goods_id":,"shop_price":,"cat_id":}
) 

取出商品编号对5求余等于1的记录

db.goods.find(
{cat_id:{$mod:[,]}},
{"goods_name":,"goods_id":,"shop_price":,"cat_id":}
)

取出分类为3或11的商品

db.goods.find(
{"cat_id":{$in:[3,11]}},
{"goods_name":1,"goods_id":1,"shop_price":1,"cat_id":1}
)