rdbms

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How to Design "Country", "Province" and "City" Tables?

EXAMPLE 1: xTable:开发者_Go百科 xTableID, CountryName, PovinceName, CityName OR EXAMPLE 2: Country: CountryID, CountryName[详细]

2023-02-01 17:59 分类：问答
Functional dependencies and Normalization

consider a relation R = {P, Q, R, S, T} and the functional dependency F = {P -> Q, {Q, R} -> S, S -> {Q, R}, {S, T} -开发者_开发知识库> phi}. Are there any redundant functional dependencies in F? If s[详细]

2023-02-01 02:32 分类：问答
NoSql option for MMORPGs

I was wondering what sort of benefits a nosql option might have either in lieu 开发者_运维知识库of, or in conjunction with a rdbms for a typical MMORPG.In particular, I\'m curious as to how data integ[详细]

2023-01-30 04:45 分类：问答
Friend Relationships in a Social Network

I think instead of maintaining a single friendRelations table containing a list of relations of all users on my network it would be better to make a separate Relations table for each user on network,[详细]

2023-01-28 16:08 分类：问答
First database with referential integrity constraints -- suggestions, feedback, errors?

TARGET_RDBMS: MySQL-5.X-InnoDB (\"X\" equals current stable release) BACKGROUND: Building my first database with true referential integrity constraints, in an effort to get feedback, after creating t[详细]

2023-01-28 13:23 分类：问答
Lossless Join Decomposition

I am studying for a test, and this is on the study guide sheet.This is not homework, and will not be graded.[详细]

2023-01-28 10:18 分类：问答
Is there any different between a Column-oriented DBMS and RDBMS when designing a database schema?

Is there any differ开发者_如何学Pythonent between these two kind of database? If yes, what is the different? Thank you.The question isn\'t really answerable because \"RDBMS\" and \"column-oriented\" r[详细]

2023-01-28 01:00 分类：问答
Not to delete child record on deleting parent table record

I am little bit newbie in Hibernate and DBMS and stuck on a problem. I have two table. One is A and second is B. There is Many-to-One relationship between these two tables. Now on removing one record[详细]

2023-01-27 17:37 分类：问答
Is Oracle an example of DBMS or RDBMS?

I am confused about the terms \"DBMS\" and \"RDBMS\". What exactly is the difference between them and more specifical开发者_运维技巧ly, can oracle be called a DBMS or an RDBMS? If it is an example of[详细]

2023-01-27 02:39 分类：问答
what database model to use?

i need a database with the following sheme: Product | Discounter | Price ----------------------------------------------开发者_JAVA百科-----------[详细]

2023-01-26 12:03 分类：问答