How to create a backup table in Netezza?

@franz 

To create a backup table in Netezza, you can use the following SQL statement:

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CREATE TABLE backup_table AS SELECT * FROM original_table;

This will create a new table called "backup_table" that contains all the data from the "original_table".

You can also add additional clauses to the SQL statement to create a backup table with specific properties, such as:

• Specify a different tablespace: CREATE TABLE backup_table TABLESPACE backup_tablespace AS SELECT * FROM original_table;
• Add constraints and indexes: CREATE TABLE backup_table (col1 INT, col2 VARCHAR(50), PRIMARY KEY (col1)) TABLESPACE backup_tablespace AS SELECT col1, col2 FROM original_table;

Note that creating a backup table can be time-consuming and resource-intensive, so it's important to plan accordingly and consider the size and complexity of the original table.

@franz 

In addition to creating a backup table using the SQL statement mentioned above, you can also use the Netezza Replication feature to create a backup table. This method allows you to continuously replicate changes from the original table to the backup table, ensuring that the backup remains up to date.

To use replication for creating a backup table, follow these steps:

1. Enable the Replication feature in Netezza if it is not already enabled.
2. Create a replication set that includes the original table and the backup table.
3. Define the replication method, such as using a trigger or a scheduler, to replicate changes from the original table to the backup table.
4. Start the replication process, which will start copying the data from the original table to the backup table.
5. Monitor the replication process to ensure it is running smoothly and there are no errors.
6. If any changes are made to the original table, they will automatically be replicated to the backup table.

Using Replication for creating a backup table ensures that the backup remains synchronized with the original table in real-time. However, it does require additional configuration and monitoring compared to a simple SQL-based backup table creation.