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Только не говори "Всё!"

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Replication Guide and ReferenceYou can select from the following types of target tables:
User copy
Read-only target table that includes only those columns defined in the
subscription-set member. A user-copy table can have the same
structure as the source table or it can have a subset of source columns,
with or without before images or calculated columns.
Point-in-time
Read-only target table that includes the columns defined in the
subscription-set member and a timestamp column. A point-in-time
table can have the same structure as the source table or it can have a
subset of source columns, with or without before images or calculated
columns.
Base aggregate
Read-only target table that uses SQL column functions (such as SUM
and AVG) to compute summaries of the entire contents of the source
table.
A base-aggregate table summarizes the contents of a source table. A
base-aggregate table also includes a timestamp of when the Apply
program performed the aggregation. Use a base-aggregate table to
track the state of a source table on a regular basis.
Change aggregate
Read-only target table that uses SQL column functions (such as SUM
and AVG) to compute summaries of the entire contents of recent
changes made to the source table, which are stored in the CD table or
in an internal CCD table.
A change-aggregate table summarizes the contents of a CD table or in
an internal CCD table, rather than the source table. A
change-aggregate table also includes two timestamps to mark the time
interval for when the changes were captured (written to the CD or
CCD table). Use a change-aggregate table to track the changes
(UPDATE, INSERT, and DELETE operations) made between
replication cycles.
CCD (consistent-change data)
Read-only target table with additional columns for replication control
information. These columns include: a log-record number (or
journal-record number), an indicator of whether the source table was
Chapter 4. Subscribing to sources 79
changed using an SQL INSERT, DELETE, or UPDATE statement, and
the log record number and timestamp of the commit statement
associated with the insert, delete, or update. You can also optionally
include before-image columns and columns from the UOW table.
Replica
Read/write target table for update-anywhere replication. A replica
table is the only type of target table that your application programs
and users can update directly. Thus, a replica table receives changes
from the master table and from local application programs or users.
Replica tables can have the same structure as the source table or they
can have a subset of source columns, but they do not include any
additional replication control columns (such as timestamps). Replica
tables are supported only for DB2 databases.

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