DBA_HIST_SQL_SUMMARY displays historical SQL summary information.
| Column | Datatype | NULL | Description | 
|---|---|---|---|
| SNAP_ID | NUMBER | NOT NULL | Unique snapshot ID | 
| DBID | NUMBER | NOT NULL | Database ID for the snapshot | 
| INSTANCE_NUMBER | NUMBER | NOT NULL | Instance number for the snapshot | 
| TOTAL_SQL | NUMBER | NOT NULL | Total number of SQL | 
| TOTAL_SQL_MEM | NUMBER | NOT NULL | Total memory usage of SQL | 
| SINGLE_USE_SQL | NUMBER | NOT NULL | Number of single use SQL | 
| SINGLE_USE_SQL_MEM | NUMBER | NOT NULL | Total memory usage of single use SQL |