online shopping database design

Label:Transferred from: http://www.cnblogs.com/MeteorSeed/archive/2013/03/27/2880054.html ------------------------------------------------------------------------------------- Directory The origin of a Codd RDBMS12 law--rdbms Design phase of two-relational database Three design principles Four naming rules Database

-many relationship between two entities, and it is possible to translate into many-to-many relationships, then you might want to set the Chengdo to multiple relationships. Shifting from the existing many-to-many relationship to many-to-many relationships is much more difficult than a many-to-many relationship in the beginning. -cs Data Architect 5. Using the View To provide another layer of abstraction between your database and your application code,

embedding and linking Technology (0LE) programming interfaces, and integration with the Internet, and so on, the most important reason to choose Microsoft SQL Sever is its scalability and high security. Because Microsoft SQL Sever is based on the multi-wire program parallel database kernel, it can play the advantage of additional processors, in many cases, only with a specific parallel database and operati

Database Design-practice, database-PracticeObjectives and objectives Objective: Master routine database tabulation operations Understand the table design specifications What is table structure design: Table structure

number of digits of the type_layer according to user requirements, you can change the number of restricted layers and the number of sub-categories. In fact, the above design is not only used in the category table, some online forum programs that can be displayed by tree type list mostly adopt similar design. Some people may think that the type_father field in

Tags: Shopping cart code appears technical merchandise with outdoor key ice infoIt's not a database table design, big God. Recently made order system, there is a problem with this, Have Customer table, order form, set table. The order form is generated by placing orders. Change Order status code to 1 after payment (indicates payment has been made) (1) If a order

, there are few and relatively simple ideas about database design. Most designs only stay on the surface, which is often fatal and leaves many risks for the system. Either the problem is discovered only during code development, or the problem occurs not long after the system goes online and runs, and it may increase the workload for later maintenance. If you want

, there are few and relatively simple ideas about database design. most designs only stay on the surface, which is often fatal and leaves many risks for the system. Either the problem is discovered only during code development, or the problem occurs not long after the system goes online and runs, and it may increase the workload for later maintenance. If you want

Abstract This article mainly analyzes the ORACLE system structure and working mechanism from four different levels of Adjustment Analysis in the ORACLE environment of a large database, the optimization and adjustment schemes for ORACLE databases are summarized in nine different aspects.Key words: ORACLE database environment Adjustment Optimization Design SchemeTh

1. Access method: This step includes storing and retrieving records from a file.2. Alias (alias): Another name for a property. In SQL, you can replace the table name with an alias.3. Alternate keys (alternate key, er/relationship model): Candidate keys for the primary health are not selected in the Entity/table.4. Anomalies (exception) See Update anomalies5. Application design: A phase of the database appli

smaller units. In the database design, start the top-level step by identifying the relationship between the object and the data, and then gradually add details, such as the information about the object and the link you want to save (as an attribute) and all constraints on entities, relationships, and attributes. 128. Transaction: an action or a series of actions executed by users and applications to access