创建索引概述

CREATE [ UNIQUE | BITMAP ] INDEX [ schema_name. ] index_name
  ON { cluster_index_clause
     | table_index_clause
     | bitmap_join_index_clause
     }
[ USABLE | UNUSABLE ]
[ { DEFERRED | IMMEDIATE } INVALIDATION ] ;


table_index_clause:
[ schema. ] table [ t_alias ]
(index_expr [ ASC | DESC ]
  [, index_expr [ ASC | DESC ] ]...)
  [ index_properties ]

index_properties:
[ { { global_partitioned_index
    | local_partitioned_index
    }
  | index_attributes
  }...
| INDEXTYPE IS { domain_index_clause
               | XMLIndex_clause
               }
]

cluster_index_clause:
CLUSTER [ schema. ] cluster 

index_attributes:
[ { physical_attributes_clause
  | logging_clause
  | ONLINE
  | TABLESPACE { tablespace | DEFAULT }
  | index_compression
  | { SORT | NOSORT }
  | REVERSE
  | VISIBLE | INVISIBLE
  | partial_index_clause
  | parallel_clause
  }...
]

bitmap_join_index_clause:
[ schema.]table
   ( [ [ schema. ]table. | t_alias. ]column
     [ ASC | DESC  ]
       [, [ [ schema. ]table. | t_alias. ]column
          [ ASC | DESC ]
       ]...
   )
   FROM [ schema. ]table [ t_alias ]
          [, [ schema. ]table [ t_alias ]
        ]...
   WHERE condition
      [ local_partitioned_index ] index_attributes