查找表中 t 时间字段大于 ‘2015-10-01 10:10:10’ 且小于‘2015-10-15 10:10:10’ 且在存在 x字段 且 x字段值 包含‘abc‘的所有行
{
"t": {"$gt": "2015-10-01 10:10:10", "$lt":"2015-10-15 10:10:10"},
"x": {"$ne": null, "$exists":true, "$regex": ‘.abc.‘, "$options": ‘i‘}
}
类似：select * from mongodb.collections where t>‘2015-10-01 10:10:10‘ and t<‘2015-10-15 10:10:10‘ and x <> null and x like ‘%abc%‘
原文：http://www.cnblogs.com/fery/p/4892242.html