Oracle in a Nutshell

Name

ANALYZE

Synopsis

ANALYZE {TABLE [schema.]table_name 
 [PARTITION partition_name | SUBPARTITION subpartition_name]
| INDEX [schema.]indexname 
 [PARTITION partition_name | SUBPARTITION subpartition_name]
| CLUSTER [schema.]clustername}
}
{ COMPUTE [SYSTEM] STATISTICS 
| ESTIMATE [SYSTEM] STATISTICS [SAMPLE integer {ROWS | PERCENT}]
  {[FOR {TABLE 
  | ALL [INDEXED] COLUMNS [SIZE integer] 
  | COLUMNS [SIZE integer] {column_name | attribute} [SIZE integer] 
  | ALL [LOCAL] INDEXES]
  } 
}
| DELETE [SYSTEM] STATISTICS 
| VALIDATE STRUCTURE [CASCADE] 
| LIST CHAINED ROWS [INTO [schema.]table_name] 
| VALIDATE REF UPDATE [SET DANGLING TO NULL]
}

Collects or deletes statistics about an object in the database, validates the structure of an object, or identifies migrated and chained rows in a table or cluster.

Statistics are accessible in the ALL_TABLES, USER_TABLES, and DBA_TABLES views. Some column statistics are accessible in the ALL_TAB_COLUMNS, USER_TAB_COLUMNS, and DBA_TAB_COLUMNS views. Cluster statistics also appear in USER_CLUSTERS and DBA_CLUSTERS.

Keywords

COMPUTE STATISTICS

Computes the exact statistics for the entire named object and stores them in the data dictionary.

ESTIMATE STATISTICS

Estimates statistics for the named object and stores them in the data dictionary. The optional SAMPLE clause may be used to specify the sample size to use; this clause contains the following keywords:

ROWS

Causes integer rows of a table or cluster, or integer entries from an index, to be sampled.

PERCENT

Causes integer ...