rdbms

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inventory system: transaction-based or store quantity, update with trigger?

How would you design the data model for an inventory management system in RDBMS? Would you: store each purchase & usage, and uses SUM() and GROUP BY to calculate the warehouse quantity on-the-f[详细]

2023-02-17 16:01 分类：问答
"has_one" vs "belongs_to" vs "has_many" in RDBMS terms

Can someone please clarify what these mean in RDBMS terms. I always get these confused,开发者_如何学JAVA and I can\'t find a single decent tutorial on this. Try to reduce the definitions to,[详细]

2023-02-16 07:06 分类：问答
Performance Implications of Using Oracle DBMS_WM.EnableVersioning

The command to enable versioning (part of开发者_C百科 what Oracle calls Workspace Management) in Oracle (DBMS_WM.EnableVersioning) creates non-materialized views, which cannot be indexed.Will this kil[详细]

2023-02-15 14:54 分类：问答
Embedded nosql open source java database

I\'m developing an open source product and need an embedded dbms. Can you recommend an embedded open source database that ...[详细]

2023-02-14 23:46 分类：问答
“Relation” versus “relationship” in RDBMS/SQL?

Coming from question “Relation” versus “relationship” What are definitions of \"relation\" vs. \"relationship\" in RDBMS (or database theory)?[详细]

2023-02-14 21:33 分类：问答
How to effectively store a high amount of rows in a database

What\'s the best way to store a high amount of data in a database? I need to store values of various environmental sensors with timestamps.[详细]

2023-02-14 10:55 分类：问答
CakePHP: Translating database 'inheritance' into app models/controllers

I am currently designing a database for a system containing a number of different user types. My schema look like this:[详细]

2023-02-11 15:09 分类：问答
mySQL: Quering time-related rows grouped by century?

I am working on a project which features one database table looking like this (structurally, but not datawise - puuh):[详细]

2023-02-09 21:37 分类：问答
Using MongoDB and MySQL in unison

Some parts of my web app would开发者_开发技巧 work very well with a RDBMS, such as user and URL handling - I want to normalize users, emails, hosts (ie stackoverflow.com), and urls (ie https://stackov[详细]

2023-02-08 04:55 分类：问答
HABTM echo value like standard relationship

I might be missing the point on this, but I am trying to echo out a HABTM开发者_开发百科 value in my index, and I cannot seem to get the data.[详细]

2023-02-07 16:54 分类：问答