"Table" for queries only - Firebase

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I’m developing an app with firebase (Realtime) and ionic3.
I don’t know much about this technology, and I couldn’t clear up a question with my research:

It is possible to create a table for query only ?
For example, need a table to ONLY bring products to research, this is possible ?

firebase ionic3 realtime-database

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I do not know if I understood your doubt well, however, as described in the documentation: https://firebase.google.com/docs/database/security/quickstart?hl=pt-br

Database rules require Firebase Authentication and grant read and write permissions to users only authenticated. Standard rules ensure that the database is not accessed by anyone before being set up. Then customize them according to your needs. Check out some common examples:

// These rules don't allow anyone read or write access to your database
{
  "rules": {
    ".read": false,
    ".write": false
  }
}

Therefore, by defining these rules, it is possible to configure the level of access of each user to the data, in this same documentation link, there is a deeper explanation about defining these rules for users.

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