How to link or link database 2 to the first one?

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nikita_chiru2016-07-06 00:26:14

Android

nikita_chiru, 2016-07-06 00:26:14

I have a database with products
I want to make a shopping cart in the application through the second database using index links, since the first one will be updated if necessary...
tell me how to implement

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1 answer(s)

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SlavikF, 2016-07-14
@SlavikF

The question is a little confusingly written...
Usually "connect" not "databases", but tables in one database.
Tables are linked using foreign keys.
To get combined data, I use JOIN statements.