kinetica database review

Database review 5-security and database review securityDatabase review CH7 Security 7.1 database security Introduction If integrity is a database protection measure for authorized users

Database review 7 -- recovery, database review 7Database review CH14 recovery 13.1 recovery concept Database SystemRestoreIt refers to the behavior that restores the database from an in

Database review 8 -- concurrency, database review 8Database review CH15 concurrency 15.1 concurrency issues The I (Isolation, independent) of the ACID nature of the transaction, and the concurrent transactions are transparent. The interspersed transactions will produce multi

Database review 10--PL/SQL, database review plsqlDatabase review CH10 PL/SQL10.1 PL/SQL Introduction PL/SQLIt is an Oracle procedural extension of SQL. PL/SQL can implement SQL-related procedural programs andStored ProcedureAndFunctionAllows SQL business logic to reside on t

Basic knowledge review Part 3 database access and basic knowledge review Part 3 This article focuses on database operations. Here it does not apply to hibernate or mybatis. It is explained with the original JDBC. After understanding these principles, it is easier to understand and learn about hibernate or mybatis.1: si

Tags: default number of users int review multi-user student relationship ATI WarehouseDatabase is the newest technology of data management, and it is an important branch of computer science. From online transaction processing (on-line Transaction PROCESSING,OLTP) to online Feixi processing (on-line analysis Processing,olap), from General enterprise management to computer-aided design and manufacturing (CAD/CAM), Computer Integrated Manufacturing Syste

Summary of database Principles and Applications Review questions, database principles questions Summary of database Principles and Applications Review questions I. Single-choice questions (1 point for each question, 20 points in total) 1. In the three modes of the

Database Review CH2 Database Architecture 2.1 Database Architecture hierarchyA database architecture can be divided into 3 tiers: External level Conceptual hierarchy Internal level The external hierarchy refers to the interface that each user accesses t

row to form an entity, and a number of correspondence between entities and entities The example here is similar to a class in object-oriented, except that it focuses only on the data (fields) that describe the object, not on the object's behavior (function) V. Concepts in the Database Database, non-homogeneous data should be placed in a different database (1) Fa

Database Review CH5 Integrity 5.1 integrity constraintsDatabase Integrity refers to the logical consistency, correctness, validity and compatibility of the data in the database, then the integrity constraint refers to the user insert, modify and delete operations, the DBMS in order to ensure the database logical consis

characteristics of data, dynamic characteristics, and integrity constraintsCorresponding, the data model is usually composed of three parts, data structure, operation and integrity constraint.Relational Data Model:Data structures: Two-dimensional tables: relationships, tuples, attributes, codes, domains, components, relational patternsManipulation of the data model: collection operations, objects, and results are all relationshipsIntegrity constraints: Entity integrity, referential integrity, u

First, create a database1.interface operation: CREATE database, CREATE TABLE, set primary key, detach and append database2. each database of MS SQL Server contains:1 master data Files (. mdf) must be1 transaction log files (. ldf) must be3, can contain:any number of secondary data files (. ndf)Multiple transaction log files4. Filegroups: Multiple data file logic can be divided into a group, convenient for l

Summary of the review of database principlesdatabase technology is the main research on how to organize and store data, efficient acquisition and processing of data, and can meet the needs of a variety of users of information technology, because the requirements of the database technology is very large, so learning this course of knowledge and technology is very

Review database Connection pool: C3P0, DBCP1, the advantages of database connection pooling technology:• Resource reuse:Due to the reuse of database connections, there is a high performance overhead associated with frequent creation and release of connections. On the basis of reducing the system consumption, on the oth

Label:Database Review ④ June 15, 2016 21:34 Main Logical Data Model (LDM) logical 1. Three elements of the logical data model: Data Structure data structure Data Operation manipulation Data Constraints constraints 2. History of the relational model E.f.codd, a researcher of IBM company, proposed relational model in 1970 Proposed the Relational-algebra Propose relational algebra Defined the 1st, 2nd, and 3rd Normal Forms

Tags: database transaction SQL SQL transactionDatabase review CH13 Transaction 13.1 ConceptsA transaction is a series of database operations performed as a single logical unit of work that may modify multiple tuples in multiple tables The structure of the normal execution of a transaction is: begin; 1 2 ... SQL execution N commit; The BEGIN flag starts a transact

Database Review ⑩June 19, 201613:40Main Transactions TransactionThe concept of 1.Transaction Concept transactionsA transaction is a unit of program execution that accesses and possibly updates various data items.A transaction is a unit of concurrency control and is a user-defined sequence of operations. These operations are either done or not, and are an inseparable unit of work. With transactions, SQL Serv

Label:Database Review ⑨ June 19, 2016 12:45 Main Database Programming 1. Introduction of Transact-SQL Transact-SQL is the language used by the application to interact with SQL Serverdbms. Transact-SQL = high-level programming language can apply Transact-SQL to database programming to realize data processing function Variables in the 2.transact-sql Local variables

This is my second blog in 51, mainly to review my it career, first after graduation I engaged in ERP development, involving large enterprises of human resources management, logistics management, production management, finance and other fields, the front desk will make form, report. The background will write stored procedures and so on. In the software development process I participated in the whole process of software including: Demand research, summa

Tags: name login list Practice COM label Message Info user A bit with the original database in the use of codefirst far, but always review it, must be comprehensive point. One, insert two users in the user table (users) Second, generate the Post interface MVC generates a lot of interfaces and doesn't use Ajax, which is rarely used in real-world development, just for demonstration purposes. But no matter wh