3nf

• Two instances of the database design - turn

(Note: From http://blog.163.com/jiang-640/blog/static/86403594200932994637923) First, the tree relationship between the data tables Many programmers are doing database design, data encountered tree relationship, such as the type of table common, name

• On database design three paradigms

Designed a database of children's shoes, definitely on the database design three paradigms have a certain understanding, which is the basic principles of database design, but the database is not designed according to these three paradigms have to do?

• Database sql Summary

A year ago, in the school database system overview of this course, but the class just heard some less, and no practical operation. Also remember about 1NF, 2NF, 3NF, BCNF, when virtually no understanding of these concepts are not listening to a few c

A person to grow into the position of project manager to understand the database design principles, although a lot of things that are relatively strong theoretical things; when we get a new demand, we need to figure out from beginning to end, you beg

• Creating and managing tables

Creating and managing tables The database object: table, view, index, sequence, synonym, etc.. Table: a collection of basic data stored by rows and columns View: drawn from the table logically related data collection. Series: Numerical provide Index:

• MYSQL database field name and design specifications -

I just collections of people to write about!!! 1 Design Principles 1) standardization and standardization of data helps to eliminate redundant data in the database. There are several standard forms, but the Third Normal Form (3NF) is usually consider

• oracle sum of eight --- DDL

Create and manage objects in the database table: a table, views, indexes, sequences, synonyms, etc. Table: a collection of basic data storage by rows and columns view: from the table out of a collection of logically related data. Sequence: to provide

• Introduction to oracle 07

Create and manage objects in the database table: a table, views, indexes, sequences, synonyms, etc. Table: a collection of basic data storage by rows and columns view: from the table out of a collection of logically related data. Sequence: to provide

• Oracle database management application and development of (XII)

Eighth, to create and manage tables 18.1 objects in the database Table: a collection of basic data storage by rows and columns View: from the table out of a collection of logically related data. Sequence: the value of providing a regular Index: impro

• oracle-based summary (h)

Creating and managing tables Objects in the database: there are tables, views, indexes, sequences, synonyms, etc. Table: a collection of basic data storage by rows and columns View: from the table out of a collection of logically related data. Sequen

• oracle create table statement notes

Creating and managing tables Database objects : A table. View . Index. Sequence . Synonyms, etc. . Table : Collection of basic data storage by rows and columns View : Drawn from the table of logically related data collection . Sequence : Provide a re

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• Paradigm of relational database 3

The first paradigm (1NF) no duplicate columns. The first paradigm (1NF) is the relationship between the pattern of the basic requirements. The second paradigm (2NF) is totally dependent on the primary key attribute. The second paradigm (2NF) requires

• Summary of database design paradigm

A, 1NF: atomic (not further divided) 1NF is the column for each database table the basic data items are indivisible, the same column can not have multiple values, that is, an entity can not have more than one value or property can not have duplicate

• (XF - 1) database design principles (a)

1 Design Principles 1) standardization and standardization of data helps to eliminate redundant data in the database. There are several standard forms, but the Third Normal Form (3NF) is usually considered in terms of performance, scalability and dat

• Database design principles (a)

1. Design Principles 1) standardization of data standardization and normalization helps to eliminate redundant data in the database. There are several forms of standardization, but the Third Normal Form (3NF) is usually considered in terms of perform

• Database paradigm (1NF 2NF 3NF BCNF) Detailed two

Paradigm Application We gradually get to a forum's database, the following information: (1) User: user name, email, homepage, phone, address (2) Posts: post title, post content, respond to the title, your reply We will first design for the mere exist

• Database paradigm (1NF 2NF 3NF BCNF) Detailed II

Model applications A forum for us to gradually get the database, the following information: (1) User: user name, email, homepage, telephone, contact address (2) Posts: post title, post content, respond to the title, your reply The first time we desig

• Database paradigm (1NF 2NF 3NF BCNF) A Detailed

Database design paradigm is needed to meet database design specifications that meet these specifications of the database is simple, clear structure, while the insertion does not occur (insert), delete (delete) and update (update) operation exception.

• Database paradigm (1NF 2NF 3NF BCNF) Detailed one

Database design paradigm is needed to meet database design specifications to meet these specifications database is simple, clear structure, at the same time, does not occur insert (insert), delete (delete) and update (update) operation exception. On

• MYSQL database naming and design rules

1. Design principles 1) standardization of data standardization and normalization helps to eliminate redundant data in the database. There are several forms of standardization, but the Third Normal Form (3NF) is generally considered in terms of perfo

• MYSQL database name and design specifications

1 Design Principles 1) standardization and standardization of data helps to eliminate redundant data in the database. There are several standard forms, but the Third Normal Form (3NF) is usually considered in terms of performance, scalability and dat

• Three Forms of Application Database Design Analysis (2)

The third paradigm (3NF): In the second paradigm, based on data in the table if there is no section on any non-keyword candidate keyword section of the transfer function depends, is in the third paradigm. The so-called transfer function dependent on

• Database development specification

1. Data tables and fields of design principles of table design 1, standardization and normalization of data Standardization helps to eliminate redundant data in the database. There are several forms of standardization, we are here to use Third Normal

• Database development norms

Database development norms Database development norms 1. Field data sheets and design Table design principles 1, standardization and regularization Standardization of data in the database help to eliminate data redundancy. There are several forms of

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