1. ITEC 313 Database Programming
Bits of SQL

2. Objectives Review Learn how to create and use
Select Statement
Creating tables
Learn how to create and use
Sequence
View
Learn how to Grant/Revoke priveleges

3. Syntax of SELECT
SELECT [ALL | DISTINCT] select-list FROM table-reference-list [WHERE search-condition] [GROUP BY column-name [, column-name]... ] [HAVING search-condition] [ [UNION | UNION ALL |INTERSECT | MINUS] select-statement ] ... [ORDER BY {unsigned integer | column-name} [ASC|DESC]]

4. Syntax of SELECT select-list : table-reference-list search-condition
columns, expressions, fixed values.
Include aliases
table-reference-list
Tables, views, subqueries (inline view)
search-condition
Conditions involving columns, fixed values, subqueries

5. Syntax of Create Table Statement
CREATE TABLE table-name ( Column-name data-type [column-constraints] [DEFAULT default-value] {, Column-name data-type } [table-constraint {, table-constraint}] )

6. Format of Alter Table Statement
ALTER TABLE table-name ADD column-declaration [ column-constraints] Or ADD table-constraints ALTER TABLE table name MODIFY column

7. Sequences autonumber field
independent of a column
An object in Oracle that is used to generate a number sequence
Useful for creating a unique number to act as a primary key

8. Format of Sequence
CREATE SEQUENCE sequence_name     MINVALUE value     MAXVALUE value     START WITH value     INCREMENT BY value     CACHE value;

9. Views Representation of an sql statement Used for
Only the code to create the view is stored in the data dictionary NOT the actual data
Used for
Improving efficiency
Improving Security
Hiding details/columns from end users

10. Syntax of VIEW
CREATE VIEW view-name AS
Select-statement

11. Grant/Revoke Privileges are of two types :
 System Privileges
Object privileges
GRANT : allows users access to your objects.
INSERT, DELETE, UPDATE, SELECT, EXECUTE privileges may be granted to other users
REVOKE : removes existing privileges on an object from other users.

12. SYNTAX of Grant/Revoke
GRANT INSERT, DELETE, UPDATE, SELECT, EXECUTE|ALL on object-name TO user-list|ROLE|PUBLIC;
REVOKE INSERT, DELETE, UPDATE, SELECT, EXECUTE | ALL on object-name FROM user-list|ROLE|PUBLIC;
ROLE: contaimns groups of users determined by the DBA
PUBLIC : A system ROLE that contains all users of the database