I need to fetch the records from 2 different databases using join or any other methods.
I have created different connection to connect with two databases but I don't know how I can execute the query and which connection should I used to fetch the records.
Any suggestions?
Related
I tried this query below and got a database query builder not converted to string error
ModelA::join(DB::connection('mysql2')->table('table1'), 'modela.id','table1.id')->get();
Eloquent does not support joining data from different connections.
If both databases are stored on different servers, the only thing you can do is to fetch relevant data from both connections and then join it programatically.
Joining data from different databases is possible if both databases are stored on the same server. In order to do that, you'll need to prefix table names with database names. With Eloquent, you'd additionally need to use the same connection to access both databases.
Then, it could look like this:
ModelA::join('database2.table1', 'modela.id', 'database2.table1.id')->get()
I have written a query in PhpMyadmin to fetch data from two databases running in the same server, and is working fine. But I am not sure how to use this query in PHP code. This query contains RIGHT JOIN and other sub-queries. Even if I open two DB connections, how will I execute this query and which Connection should I use?
Eg.
Database A: Table: accountmaster (contains the profile details of the users, with IDs for City, State etc)
Database B: All masters (City, State etc)
Query: fetching all profile entries by joining these two databases.
If you share your query, I think we could elaborate on more precise answers.
Probably your question is already answered here.
Firstly, you should use one connection from any database. I would prefer to connect to database A, once it contains the references to database B and makes sense for me to request join data from B.
As discussed in the link, it is necessary that the user has the privileges to execute the query.
Finally, it is just to write your query as discussed here - as a string - and pass it as a parameter to mysqli query.
I have two databases primary/parent database is in Mysql (with PHP) and child database is in Mssql (with .Net). Both databases are of same structure and contains same data. My requirement is when any record in parent database updated then it will update the same record in child database. In other means data syncing in parent and child databases. Only want to do it via Mysql and PHP. Can some one help me out. Thanks in advance for any help.
Update:- I don't want to use trigger as well.
.Net application has some advanced functionality as well, so there is difference in number of tables, mssql database has some more tables than mysql database. But the matched tables have same structure as in parent database.
I have multiple databases and I need to search for a value in a table and set it to NULL in all instances across all databases.
I know how to query individual databases after "USE 'DBName'" is called to select a particular database.
How do I loop all databases?
Use the SHOW DATABASES query to list all databases.
You don't need to USE the database to query its tables:
SELECT something FROM databasename.sometable
I'm intending to develope a web that interacts with three different Mysql databases in the same server. User and password are the same in all three databases.
I want to use mysqli in procedural mode.
Some times I want to query just one databse, some times two of them, whatever.
What would it be the best way to connect with two of them and then, say, join two tables belonging to different databases?
Thanks in advanced!
If the databases all reside in the same server, you can query any table in any database at any time that you have access to by prefixing it with the database name:
SELECT *
FROM database1.table1
JOIN database2.table2 ON ...
If the databases are on two different servers or need different access rights, there's no way to do this.