MySQL Tutorial: Archiving and Loading Archived Table Data
- Create the Archive Table.
- Dump the Data into the Archive Table.
- Dump the Data into a SQL file. If you prefer to save your data to a file on the server rather than in another table you...
- Test the Archive Table.
- Test the Archive File.
- Empty the Original Table. Make sure your archive table or archive file has data...
Full Answer
How can I see the tables in MySQL database?
To list/show the tables in a MySQL database: Log into your database using the mysql command line client. Issue the use command to connect to your desired database (such as, use mydatabase ) Use the MySQL show tables command, like this: Complete info about it can be read here.
How do I create tables in MySQL?
Create a Table using MySQL Workbench With the chosen database expanded in the SCHEMAS tab, right click on Tables and select Create Table… : Enter the table name at the top (next to Name: ) and add all column names, their data type, constraints, default values, and any other details you require.
How to repair MySQL database tables?
Use this procedure to repair MySQL tables from the command line:
- Log in to the server using SSH.
- From the command line, enter this command, replacing [username] with your username and without the brackets: mysql -u [username] -p
- Enter your password.
- Again, without the brackets, enter the command: use [databasename];
- Enter the command: show tables;
How to open a MySQL database?
In order to access your MySQL database, please follow these steps:
- Log into your Linux web server via Secure Shell.
- Open the MySQL client program on the server in the /usr/bin directory.
- Type in the following syntax to access your database: $ mysql -h {hostname} -u username -p {databasename} Password: {your password} hostname: the name of the MySQL server that you are ...
How do I archive data in MySQL table?
"Archive" means to copy the data somewhere else, then delete it from here. "Backup" means to copy the data elsewhere, but keep it here. You say you want to "store the data", then "delete" it and use it for "historical...".
How do you create an archive table?
An archive table stores deleted rows from another table....To create an archive table:Create a table with the same columns as the table for which you want to archive data. ... Designate the original table as an archive-enabled table by issuing an ALTER TABLE statement with the ENABLE ARCHIVE clause.More items...
How do you archive data?
5 data archiving strategy stepsInventorying and determining which data must be archived. ... Based on compliance regulations assign a retention schedule for each category. ... Develop an all-inclusive archive policy. ... Proactive protection of the data archive's integrity. ... Choosing a data archive product.
What is table archive?
An archive table is a table that stores older rows from another table. The original table is called an archive-enabled table . Db2 can automatically store rows that are deleted from an archive-enabled table in an associated archive table.
How does database archiving work?
Data archiving is the process of moving data that is no longer actively used to a separate storage device for long-term retention. Archive data consists of older data that remains important to the organization or must be retained for future reference or regulatory compliance reasons.
How do I archive data from one table to another in SQL?
The SQL INSERT INTO SELECT Statement The INSERT INTO SELECT statement copies data from one table and inserts it into another table. The INSERT INTO SELECT statement requires that the data types in source and target tables match. Note: The existing records in the target table are unaffected.
What is data archiving in SQL?
Data archiving is the practice of identifying data that is no longer active and moving it out of production systems into long-term storage systems. Archival data is stored so that at any time it can be brought back into service.
Why should I archive data?
The primary benefits of archiving data are: Reduced cost━data is typically stored on low performance, high capacity media with lower associated maintenance and operation costs. Better backup and restore performance━archiving removes data from backups, reducing their size and eliminating restoration of unnecessary files.
Why do we need to archive data?
Storing email data and archiving it on servers will undoubtedly reduce performance and speed. When deleting is not an option because regulatory compliance requires long retention periods, data archiving is the answer, as it allows organizations to store messages safely on an off-site server or in the cloud.
What is difference between archive and backup?
Definitions: A backup is a copy of your current data that you use to restore original data if it's ever damaged. An archive is historical data you must keep long-term retention reasons, such as compliance. 2.
What archiving means?
1 : a place in which public records or historical materials (such as documents) are preserved an archive of historical manuscripts a film archive also : the material preserved —often used in plural reading through the archives. 2 : a repository or collection especially of information. archive. verb. archived; archiving.
What means archival?
Definition of archival : of, relating to, contained in, suitable for, or constituting archives.
How do I create an archive table in SQL Server?
Another way of doing this is by using the SWITCH command in the partition. To archive data using the SWITCH command, you need to create same table structure in same file group as the partition that you are about to archive as shown below. Next is to switch data to newly created table.
How do I create an archive table in Servicenow?
Create a database view.Add a table to the database view.Example left join in creating a database view.Specify a field to return.Relabel a column.Specify the number of records to return.Test the database view.
How do I archive table data in SAP?
Step by Step Procedure for Data ArchivingGo to Tx. ... Give the variant and click on the maintain button. ... Select the parameters as shown below and click on continue.This is the selection screen for Preprocessing. ... Give the meaning for the variant here and click on “save”Go back to initial screen.More items...•
How do I create an archive database in SQL Server?
To save part of the audit log to a new SQL Server database (and then delete those records from the audit log): Open the database audit log. Select Action > Archive. From the Linked Server Name list, select the machine on which you want to create the new database.
Why do you archive a table?
Making an archive table from the main table allows you to truncate the main table for faster queries.
Can you archive a table in a file?
If you prefer to save your data to a file on the server rather than in another table you can archive it this way instead. Make sure your file has saved and has data in it before you truncate your original table.
Can you save a table into another archive table?
If you want to save the contents of the table into another archive table you’ll need to create a copy of the original table with all the same indexes and schema:
What is the meaning of "back up"?
Making statements based on opinion; back them up with references or personal experience.
Can you use a daily partition in InnoDB?
With InnoDB and PARTITIONs, you could set up daily PARTITION BY RANGE (TO_DAY (...)) and use "Transportable tablespaces" to disassociate a day from the table and move it separately. This will be a lot faster than the queries it would take to do the INSERT...SELECT and DELETE. Once detached, the partition (now a table in its own right) can be moved to another database or server without impacting the ingestion of more data.
Is InnoDB more than Archive?
One drawback: InnoDB's disk footprint is a lot more than Archive's.
Archiving vs. backing up
We need to be aware of the difference between backups and archives. By backing up, we mean periodic copying the data into a separate store with the option to fully and quickly restore them into the production database in case of some disaster.
Consider other options first
Before diving into this guide, give a few moments to consider other options that might be more relevant in your context:
Why create a control table in a log?
Create the Control Table: Create the control table in the Archive database to monitor the progress of the initial step of the process. This also gives the ability to easily verify the number of records in the archived and original tables. The number of archived records should match between those two tables. Remember that the number of rows in a log table is huge. The control table will be used only to help with archiving process the very first time.
What is archive table structure?
The archive table structure in the Archive database is created based on the modified client’s log table. We are going to modify the original table and add an identity column as the primary key. With archive process explanations later in this article and by analyzing the coding technique, you will see the proof that an identity column is suitable to act as a control mechanism. This provides the best performance for the row deletion during the archive process. The structure of the archive table is below:
How many rows are in a process code?
Process code is developed based on the fact that a client is getting only about 500,000 rows in one log table per day . It should work fine even if the number of produced rows per day is larger. The limit for this code will be reached when this code has to be modified to run in a loop and to archive the data by broking it down into chunks. Even then, with some adjustments, the process methodology can be utilized as well.
How many steps are there in archiving?
With these setbacks in mind, a different strategy for the initial data archiving has been developed. This strategy includes 7 general steps and was used for all huge tables in the client’s database before standard daily or weekly processes of archiving data are able to run on a regular basis.
How often do DBAs move data?
Many DBAs move data during a regular maintenance window that can happen quarterly, every half a year, or even once a year. There are plenty of articles on the Internet discussing this scenario and correctly recommending archiving these tables into chunks of data.
How many rows are there in a daily historical data?
Clients should have the full week of historical data. The average daily historical data for one client grows to about 100,000 rows, and we have 40+ clients with 5 to 10 such tables.
How many columns are there in a historical table?
After researching the table’s structure, I realized that historical tables have Date_Inserted field as the first column in the index. The index itself consists of 5-6 columns. In reality, only Date_Inserted and one more field are being used by the client when they need to verify data. As I mentioned before, verification is seldom required.
