(PECL mongo >=1.5.0) Set the write concern for this database

(PECL mongo >=0.9.5) Creates a database error

(PECL mongo >=0.9.0 <1.6.0) Execute the query.

(PECL mongo >=0.9.0) Create a new cursor public

(PECL mongo >=0.9.4) Sets whether this cursor will be left open after fetching the last results

(PECL mongo >=1.0.8) Stores a file in the database

(PECL mongo >=1.2.11) Retrieve a list of distinct values for the given key across a collection.

(PECL mongo >=1.5.0) Gets information about the cursor's creation and iteration

(PECL mongo >=0.9.2) Performs an operation similar to SQL's GROUP BY command

(PECL mongo >=1.3.3) Set the read preference for this query