--- slug: /en/engines/table-engines/integrations/mongodb sidebar_position: 5 sidebar_label: MongoDB --- # MongoDB MongoDB engine is read-only table engine which allows to read data (`SELECT` queries) from remote MongoDB collection. Engine supports only non-nested data types. `INSERT` queries are not supported. ## Creating a Table {#creating-a-table} ``` sql CREATE TABLE [IF NOT EXISTS] [db.]table_name ( name1 [type1], name2 [type2], ... ) ENGINE = MongoDB(host:port, database, collection, user, password [, options]); ``` **Engine Parameters** - `host:port` — MongoDB server address. - `database` — Remote database name. - `collection` — Remote collection name. - `user` — MongoDB user. - `password` — User password. - `options` — MongoDB connection string options (optional parameter). ## Usage Example {#usage-example} Create a table in ClickHouse which allows to read data from MongoDB collection: ``` sql CREATE TABLE mongo_table ( key UInt64, data String ) ENGINE = MongoDB('mongo1:27017', 'test', 'simple_table', 'testuser', 'clickhouse'); ``` To read from an SSL secured MongoDB server: ``` sql CREATE TABLE mongo_table_ssl ( key UInt64, data String ) ENGINE = MongoDB('mongo2:27017', 'test', 'simple_table', 'testuser', 'clickhouse', 'ssl=true'); ``` Query: ``` sql SELECT COUNT() FROM mongo_table; ``` ``` text ┌─count()─┐ │ 4 │ └─────────┘ ``` You can also adjust connection timeout: ``` sql CREATE TABLE mongo_table ( key UInt64, data String ) ENGINE = MongoDB('mongo2:27017', 'test', 'simple_table', 'testuser', 'clickhouse', 'connectTimeoutMS=100000'); ``` [Original article](https://clickhouse.com/docs/en/engines/table-engines/integrations/mongodb/)