Realational Database Terminology
1->row;2->主键列;3->普通列;4->外键列;5->普通字段值;6->普通字段null值;
Using SQL to Query Your Database
Structured query language(SQL) is:
- The ANSI standard languagte for operating relational database
- Efficient,easy to learn,and use
- Functionally complete(With SQL,you can define,retrieve,and manipulate data in the tables.)
SQL Statements
| Command | Describe |
| SELECT | Data manipulation language(DML) |
| INSERT | |
| UPDATE | |
| DELETE | |
| MERGE | |
| CREATE | Data definition language(DDL) |
| ALTER | |
| DROP | |
| RENAME | |
| TRUNCATE | |
| COMMENT | |
| GRANT | Data control language(DCL) |
| REVOKE | |
| COMMIT | Transaction control |
| ROLLBACK | |
| SAVEPOINT | |
Development Enviroments for SQL
In this course:
- Oracel SQL Developer(不推荐)
- Primarily use SQL*PLUS
The Human Resources(HR) Schema
Oracle Database 11g Documentatioin
- Oracle Database New Features Guide 11g,Release 2
- Oracle Database Reference 11g,Realease 2
- Oracle Database SQL Lanaguage 11g,Release 2
- Oracle Database Concepts 11g,Release 2
Summary
- Relational databases are composed of realtions,managed by relational operations,and governed by data integrity constraints.
- With the Oracle server,you can store and manage information by using SQL.