CREATE NODE GROUP CREATE NODE GROUP 7 SQL - Language Statements CREATE NODE GROUP create a group of cluster nodes CREATE NODE GROUP groupname WITH ( nodename [, ... ] ) CREATE NODE GROUP is a SQL command specific to Postgres-XL that creates node group information in catalog table pgxc_group. CREATE NODE only runs on the local node where it is launched. groupname The name of the selected cluster node group. nodename The name of a cluster node. A group of nodes works as an alias for node lists when defining tables on sub-clusters. Only Datanodes can be included in node groups. Create a cluster node group made of nodes called Datanode1, Datanode2. CREATE NODE GROUP cluster_group WITH Datanode1, Datanode2; CREATE NODE GROUP does not conform to the SQL standards, it is a Postgres-XL specific command.