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I have a big database which contain a table with about 26 million records. Now i need to make some reports on it from a special period of time.

So how to make a replication from that table from a special time, for example, just show replicate the records from 2015-01-01 till now?

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  • Why? Replication is designed to keep Slave in sync with Master. Use a WHERE clause to limit the out what rows are fetched.
    – Rick James
    Jun 17, 2015 at 16:03
  • @RickJames, Because I need the reports as my IVR system is working as online, and do not need all of the table's records in my reports. So if i can decrease the range of the records, I can make better speed on my reports. Isn't it?
    – shgnInc
    Jun 18, 2015 at 4:31
  • With a good index, you might not notice any improvement. With "summary tables", it might be fast regardless.
    – Rick James
    Jun 18, 2015 at 22:29

3 Answers 3

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I suggest using mysqldump instead of replication.

mysqldump <other-params> --where="date >= '2015-01-01'" db table > dump.sql

That way you have dump file which can be reused. Import will take some time, but setup is much simpler - you can import it anywhere and do what you need.

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  • So by your answer, How can I use the new records which are saved on the master database?
    – shgnInc
    Jun 17, 2015 at 11:02
  • Ah, with this you would have to re-import new data each time (only last few days depending on how often) if you needed them. If it is not one-time use, then just add proper indexes with date column for the report where needed.
    – jkavalik
    Jun 17, 2015 at 11:23
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U can use VIEW statement,so that you can replicate the records into a view table.

CREATE VIEW DATA_VIEW AS
SELECT c1, c2
FROM  table1
WHERE c2='some value'
WITH CHECK OPTION;

The purpose of the WITH CHECK OPTION is to ensure that all UPDATE and INSERTs satisfy the condition(s) in the view definition.

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Anyone looking at this in 2023 can have a separate analytics database with tables that are populated with views defined as per the reporting requirements (like records within a given timepoint) then include the database in the list of databases to be replicated in the mysql config file.

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  • You could improve your answer by explaining this a little bit and citing some references perhaps. Feb 22, 2023 at 12:50
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    Feb 22, 2023 at 12:51

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