The first chapter contains the following:
Basic concepts of database
2. The basic functions of the database
3. Classification language database
4. common database objects
Foreword
Non-Coban self SQLSERVER and C # programming for two years. Knowledge of the article series deals with some basic knowledge on the job need to use. Article acquaintance database more suitable for students or adult self-study database, the article is SSMS as an example. If you have cognitive wrong place please correct me.
The article will not cover (database type: database structure, grid-type databases, relational databases, object-oriented database, the young man wanted to know can look at someone else's article)
Definition / establish data
Database management tools have defined / build functional data, he can create a database (database), data table (table), the establishment of various types of field data tables, the primary key of the foreign key is a data table and so on.
Summary: database management tools have defined / build functional data
Data processing
Database management tools can provide the function of the data in the database for the user to operate, including the insertion (insert), modify (update), query (select) and delete (delete) data.
Summary: database management tool has functions to process data
Ensure data security
There are database management tools feature set user, password, permissions, so that different users can have different permissions to prevent confidential data leakage or malicious damage.
Example: A programmer has "read only" permission, then he can only access the data and can not be changed. Programmer B has "read and write" permission, then he can either access to data can be modified, usually in practical work, we will give a third party to create a "read only" permission of the account, and usually our own is sa account (administrator account)
summary: database management tools to ensure data security by setting permissions
The following is a login screen database management tools:
1.sa authority
2. Third-party rights
Database backup and restore data
Database management tools have to backup and restore data, or other database when you accidentally deleted an operator, or wrong with a new sheet of very important business table, this time we need to back up database management tools and data recovery Recovery data.
Summary: Database management systems have database backup and restore the data, it can minimize the loss after faulty operation.
