魔法查询函数 magic find functions
数据库字符串查询函数 function Query
函数查询 function Query ; functional query ; function queries
库函数查询 base function Query
查询函数能够处理标准化数据库事务，以便创建、读取、更新和删除数据(通称CRUD操作)。
The querying functions are capable of coping with the standard database transactions for creating, reading, updating, and deleting data (known as CRUD operations).
值得注意的是，您在执行其他查询函数时不能在指针和结果集上执行distinct函数，而应直接在集合上执行。
It's worth noting that you do not perform the distinct function on a cursor or result set as you do other query functions, but you perform it directly on the collection.
MongoDB 优于其他文档数据库的一个特性是它很容易将 SQL 语句转换成 MongoDB 查询函数调用。
One feature that differentiates MongoDB from other document databases is that it is very straightforward to translate SQL statements into MongoDB query function calls.
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