Questions tagged [schema]

A schema of a database system is its structure described in a formal language supported by the database management system (DBMS) and refers to the organization of data to create a blueprint of how a database will be constructed (divided into database tables).

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Changing Schema ownership and side effects

I am trying to understand why changing schema ownership is causing permissions to be revoked. I am having a hard time understanding schema ownership change. Here are the steps I have taken in ...
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What are the first necessary actions needed to help secure a database's schema & data? [closed]

This smells like an open-ended, opinionated, wiki free-for-all, but I'm not trying to make this a battle of opinions. It seems like there should be a good checklist out there for all to agree on ...
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Select rows from table where each row refers to a different schema

I have customer table in public schema. And I have a schema named after each customer. Each customer schema contains different tables like portals, plugin, ... When I want to select portals used by ...
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How-to implement an entity with an unknown maximum number of attributes?

I am designing a baseball simulation program and I have run into a problem with designing the boxscore schema. The problem I have is that I want to track how many runs are scored in each inning. The ...
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SQLite3 simple database design question

I'm an ruby hobbist with no experience at all related to databases. I'm writing an application that is going to gather and backup tweets and blog posts (via rss feed) in an SQLite3 database. The ...
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In Oracle how do you move a Schema to a different Tablespace?

I noticed that a Schema has been created in the USERS Tablespace but our local rule is that it should be in a Tablespace by itself. In Oracle how do you move a Schema to a different Tablespace?
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SQL: transfer database schema

If i want to transfer schema ownership to another schema i know that i need to use something like: ALTER SCHEMA destinationschema TRANSFER sourceschema.objectname; But how is it different from: ...
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Under what conditions are polymorphic associations used? What are the alternatives?

As I understand it, polymorphic relationships among tables in a database allow one table to have one foreign key that references many tables. I have found that tags are a common application of this ...
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Schema for a lease platform

I have following tables: A room I want to lease (has user.id as ForeignKey) A users table for users who can rent it An availability table for time periods the room is to use with prices for that ...
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Unique time range or database schema for a scheduling system

I'm having to design a table which contains scheduled times for media to be displayed. These scheduled times should not overlap. In my SheduledSlot table I have: id integer PRIMARY KEY begin ...
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Have postgres' pg_dump export an index

I have an index that is very expensive to calculate, and I'm looking for ways to have it be restored or transfered in a simple copy fashion. It would be done along with the underlying data of course. ...
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Please review my first thought-out attempt at a database schema

I am researching database design and theory and have finally made a thoughtful attempt at creating a schema that would be based upon SQL. I would like, if someone has time, to review my layout and ...
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designing server side database to store user-specific data

I have a database with a number of quiz questions and answers. My basic design consists of these two tables questions (question_id, question_string); answers (answer_id, answer_string, ...
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Are the any inherent shortcomings in this schema?

This is derived from the SQL generated by sqldbm.com that I simplified because it wasn't generating foreign keys correctly and it seems to me that there's no need to pull in every foreign key from the ...
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Using the output from mysqldiff.exe to transform database2 to match database1

This question is related to another I had asked earlier here: Passing passwords more securely to mysql utilities on the command line. I have recently been trying to use mysqldiff.exe, part of MySQL ...
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Schema for social network using the supertype/subtype pattern

Scenario I'm trying to come up with a schema for a kind-of social network app, where users can publish Posts (and photos inside Posts), and also manage a private Diary that has also Posts (not sure ...
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How to import an existing schema and tablespace into a postgres database, from a filesystem-level backup

Follow-up question from: Have postgres' pg_dump export an index Say I have an existing database, and I want to add to it another schema with content. I saved that content previously through a ...
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Multiple JOINs of possible properties in a 'flower' arrangement - acceptable design?

I have a functionality that has multiple (7+) potential properties to be added via a central 'hub' table. In most cases there will only be one property assigned, but it's possible the user will want ...
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Export pump all schemas except Sytem related schemas

I have around 111 schemas in one database instance and have to export all the schemas except the system related schemas to a new instance. Is there any way as to exclude system related schemas while ...

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