What is the best database architecture?
Databases that use SQL are most popular for structured data. Whereas, NoSQL databases are better for machine learning, web analytics, and IoT (Internet of Things) because of features such as higher scalability, flexibility, and speed. The other way to categorize databases is based on data models.
What software do database designers use?
Some of the most used database software include MySQL, Microsoft SQL Server, Microsoft Access DBMS, Oracle, IBM DB2, and FoxPro. These database management solutions features data independence, as the storage mechanism and formats can be changed without altering the entire application within the database.
What are the basic elements of a DBMS?
In order to facilitate these functions, DBMS has the following key components:
- Software.
- Data.
- Procedures.
- Database languages.
- Query processor.
- Runtime database manager.
- Database manager.
- Database engine.
How to design a database for tagging features?
How would you design a database to support the following tagging features: Ideally, the lookup of all items that are tagged with (at least) a set of n given tags should be done using a single SQL statement. Since the number of tags to search for as well as the number of tags on any item are unknown and may be high, using JOINs is impractical.
Which is the best way to store tags in a database?
If you are using a database that supports map-reduce, like couchdb, storing tags in a plain text field or list field is indeed the best way. Example: Running this with group=true will group the results by tag name, and even return a count of the number of times that tag was encountered.
What’s the best way to do tagging in SQL?
I’ve heard of a few ways to implement tagging; using a mapping table between TagID and ItemID (makes sense to me, but does it scale?), adding a fixed number of possible TagID columns to ItemID (seems like a bad idea), Keeping tags in a text column that’s comma separated (sounds crazy but could work).
Which is the best way to model a tagging system?
Go with your first approach, it is pretty much the standard way of modeling this type of relationship. (updated to record user who added the tag) Items ItemID (PK) ItemTags ItemID (FK) TagID (FK) Tags TagID (PK) UserTags ItemID (FK) UserID (FK)