How can create snapshot...

Question

hi all
in my testing database i want to create snapshot..through sqlplus
1.i create statpack ---- spcreate.sql file...as "sys" user
2. then try to conn as "perfstat" but i got error
SQL> conn perfstat/perfstat
ERROR:
ORA-00604: error occurred at recursive SQL level 1
ORA-00922: missing or invalid option
ORA-06512: at line 2
what should i do...
thanx
regards
Mohammadi

Answer 1

CREATE SNAPSHOT command
PURPOSE:
To create a snapshot. A snapshot is a table that contains the
results of a query of one or more tables or views, often located on
a remote database.
SYNTAX:
CREATE SNAPSHOT [schema.]snapshot
[ [PCTFREE  integer] [PCTUSED  integer]
[INITRANS integer] [MAXTRANS integer]
[TABLESPACE tablespace]
[STORAGE storage_clause]
[ USING INDEX [  PCTFREE integer | TABLESPACE tablespace
| INITTRANS integer | MAXTRANS integer
| STORAGE storage_clause ] ...
| [CLUSTER cluster (column [, column]...)] ]
[ REFRESH [FAST | COMPLETE | FORCE] [START WITH date] [NEXT date]]
AS subquery
where:
schema
is the schema to contain the snapshot. If you omit schema, Oracle
creates the snapshot in your schema.
snapshot
is the name of the snapshot to be created.
Oracle chooses names for the table, views, and index used to
maintain the snapshot by prefixing the snapshot name. To limit
these names to 30 bytes and allow them to contain the entire
snapshot name, Oracle Corporation recommends that you limit your
snapshot names to 23 bytes.
PCTFREE
PCTUSED
INITRANS
MAXTRANS
establishes values for these parameters for the internal table
Oracle uses to maintain the snapshot's data.
TABLESPACE
specifies the tablespace in which the snapshot is to be created. If
you omit this option, Oracle creates the snapshot in the default
tablespace of the owner of the snapshot's schema.
STORAGE
establishes storage characteristics for the table Oracle uses to
maintain the snapshot's data.
USING INDEX
specifies the storage characteristics for the index on a simple
snapshot. If the USING INDEX clause not specified, the index is
create with the same tablespace and storage parameters as the
snapshot.
CLUSTER
creates the snapshot as part of the specified cluster. Since a
clustered snapshot uses the cluster's space allocation, do not use
the PCTFREE, PCTUSED, INITRANS, or MAXTRANS parameters, the
TABLESPACE option, or the STORAGE clause in conjunction with the
CLUSTER option.
REFRESH
specifies how and when Oracle automatically refreshes the snapshot:
FAST
specifies a fast refresh, or a refresh using only the
updated data stored in the snapshot log associated
with the master table.
COMPLETE
specifies a complete refresh, or a refresh that re-
executes the snapshot's query.
FORCE
specifies a fast refresh if one is possible or
complete refresh if a fast refresh is not possible.
Oracle decides whether a fast refresh is possible at
refresh time.
If you omit the FAST, COMPLETE, and FORCE options,
Oracle uses FORCE by default.
START WITH
specifies a date expression for the first automatic
refresh time.
NEXT
specifies a date expression for calculating the
interval between automatic refreshes.
Both the START WITH and NEXT values must evaluate to a time in the
future. If you omit the START WITH value, Oracle determines the
first automatic refresh time by evaluating the NEXT expression when
you create the snapshot. If you specify a START WITH value but omit
the NEXT value, Oracle refreshes the snapshot only once. If you
omit both the START WITH and NEXT values or if you omit the REFRESH
clause entirely, Oracle does not automatically refresh the snapshot.
AS subquery
specifies the snapshot query. When you create the snapshot, Oracle
executes this query and places the results in the snapshot. The
select list can contain up to 253 expressions. A snapshot query is
subject to the same restrictions as a view query.
PREREQUISITES:
To create a snapshot in your own schema, you must have CREATE
SNAPSHOT system privilege. To create a snapshot in another user's
schema, you must have CREATE ANY SNAPSHOT system privilege.
Before a snapshot can be created, the user SYS must run the SQL
script DBMSSNAP.SQL on both the database to contain the snapshot and
the database(s) containing the tables and views of the snapshot's
query. This script creates the package SNAPSHOT which contains both
public and private stored procedures used for refreshing the
snapshot and purging the snapshot log. The exact name and location
of this script may vary depending on your operating system.
When you create a snapshot, Oracle creates a table, two views, and
an index in the schema of the snapshot. Oracle uses these objects
to maintain the snapshot's data. You must have the privileges
necessary to create these objects. For information on these
privileges, see the CREATE TABLE, CREATE VIEW, and CREATE INDEX
commands.
The owner of the schema containing the snapshot must have either
space quota on the tablespace to contain the snapshot or UNLIMITED
TABLESPACE system privilege. Also, both you (the creator) and the
owner must also have the privileges necessary to issue the
snapshot's query.
To create a snapshot, you must be using Oracle with the procedural
option. To create a snapshot on a remote table or view, you must
also be using the distributed option.