I have a database and its new version with changed reports, changed forms but with absolutly the same tables structure. The problem is that proper tables entries is stored in the old database.
How can I replace tables entries in new database with tables entries in old database?
Are you using a split database? You should be, so it would not matter that the back-end data was stored in an MDB and the front-end in an ACCDB.
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I want to query data from two different MySQL databases to a new MySQL database.
I have two databases with a lot of irrelevant data and I want to create what can be seen as a data warehouse where only relevent data should be present coming from the two databases.
As of now all data gets sent to the two old databases, however I would like to have scheduled updating so the new database is up to speed. There is a key between the two databases so in best case I would like all data to be present in one table however this is not crucial.
I have done similar work with Logstash and ES, however I do not know how to do it when it comes to MySQL.
Best way to do that is create a ETL process with Pentaho Data Integrator or any ETL tool. Where your source will be two different databases, in the transformation part you can remove or add any business logic then load those data into new database.
If you create this ETL you can schedule it once a day so that your database will be up to date.
If you want to do this without an ETL than your database must be in same host. Than you can just add database name just before table name in query. like SELECT * FROM database.table_name
I have a database which contains details about user information.The database contains 20 tables with users specific details.Every table contains user foreign key. I want to be able to backup specific user data from the database and restore the backup. Is it possible to restore the backup on a different database that has same tables. I am working on this but not able to find a documentation or article on this. If you could help me on this if doing this is possible. Thank you in advance
You need to write some SQL to export the data. You can use a number of techniques for example:
Gather data using views, stored procedures or a combination of both.
Export data using linked servers, import export or SSIS.
There is no backup and restore functionality for a subset if data.
(p.s. This is for SQL Server. You have three different database engines in your tags.)
I have to compare two database tables and fields ( Not their DATA) .
Say Live DB and Development DB. In live DB there are 200 tables and
in development DB there are 218 Tables With some new column fields
added in old tables too.
During the final stage i have to update the Live DB by adding the new
columns and tables taken from the development DB .
I should not loss and data in the old DB.
I tried many ways to do this but it is taking a very long time for me
to finish. One of the tool i used is mysql workbench.
Is there any queries to perform this using information schema ?
To make the things easier i imported the development DB from development server and uploaded in the live db with different name . Now both the DB are in the same server but with diff name. E.g. sitedb , sitedevdb
Whenever you update the development DB with changes that will eventually be put live, you should write a .sql script that will repeat the changes on the live database.
Otherwise this operation is super-tricky.. you may have to manually figure out the added columns yourself, or you may be able to use each INFORMATION_SCHEMA.COLUMNS to compare the old tables.
For the new tables SHOW CREATE **table_name** is really useful.
A MySQL comparison tool is probably what you need for this. The company I work for, Redgate, offers MySQL Compare (for the database schema) and MySQL Data Compare (for data).
These tools are free for non-commercial use.
I have two database, each contain different tables
leave.sql and crm.sql
I want to transfer all my leave tables into the crm database
How should I do it?
If the other database has different tables then the leaves database then all you need to do is import the data into the crm database. Finally, make sure your leaves script is connected to the new crm database.
Two other methods:
On the mysql prompt, you can rename your tables - and effectively move them from one database to the other (if both are on the same filesystem):
From http://dev.mysql.com/doc/refman/5.0/en/rename-table.html:
As long as two databases are on the same file system, you can use
RENAME TABLE to move a table from one database to another:
RENAME TABLE current_db.tbl_name TO other_db.tbl_name;
If you are using MyISAM tables, and you have root privileges, you can just do:
stop your mysql server
move your tables from the old database directory to the new one
start your mysql server
All those assuming the tables in your old database (the ones you want to move) have different names than the ones in your new database (the ones you want to keep). If that's not true, you'll also have to change the names.
We are handling a data aggregation project by having several microsoft sql server databases combining to one mysql database. all mssql database have the same schema.
The requirements are :
each mssql database can be imported to mysql independently
before being able to import each record to mysql we need to validates each records with a specific createrias via php.
each imported mssql database can be rollbacked. It means even it already imported to mysql, all the mssql database can be removed from the mysql.
we would still like to know where does each record imported to the mysql come from what mssql database.
All import process will be done with PHP .
we have difficulty in many aspects. we don't know what is the best approach to solve our problem.
your help will be highly appreciated.
ps: each mssql database has around 60 tables and each table can have a few hundred thousands .
Don't use PHP as a database administration utility. Any time you build a quick PHP script to transfer records directly from one database to another, you're going to cause yourself a world of hurt when that script becomes required for production operation.
You have a number of problems that you need solved:
You have multiple MSSQL databases with similar if not identical tables.
You have a single MySQL database that you want to merge the data into.
The imported data must be altered in a specific way before being merged.
You want to prevent all duplicate records in your import.
You want to know what database each record originally came from.
The solution?
Analyze the source MSSQL databases and create a merge strategy for them.
Create a database structure on the MySQL database that fits the merge strategy in #1, including all the new key constraints (like unique and foreign keys) required for the consolidation.
At this point you have two options left:
Dump the data from each of the source databases into raw data using your RDBMS administration utility of choice. Alter that data to fit your merge strategy and constraints. Document this, and then merge all of the data into your new database structure.
Use a tool like opendbcopy to map columns from one database to another and run a mass import.
Hope this helps.