1. Anar Godjaev
http://anargodjaev.wordpress.com/
Contraints/Objects/Set Operators
Not null
Unique
Primary key
Foreign key
Check
Create table employees
(
employee_id number(6) ,
First_namevarchar2(20),
Job_idvarchar2(10) not null,
Constraint emp_emp_id_pk primary key (employee_id),
Constraint emp_dep_fk foreign key (department_id) references
Departments (department_id) [on delete]
[cascade | set null] );
Constraint <constraint_name>pimary key (col_names)
Unique (col_names)
Check (condition)
Foreign key (col_name) references
tab_name (col_name)
Alter table table_name add constraint c_nametypce (col);
Constraint emp_Sal_min check (salary > 0);
Alter table employees drop | disable | enable constraint const_name;
Create view v$name as select * from tbl_name;
Create or replace view empv10 as
...
with check option name
read only;
selectrownum as rank , last_name , salary from ... where rownum<= 3;
Objects:
table , view, sequence, index, synonym
sequence:

2. Anar Godjaev
http://anargodjaev.wordpress.com/
create sequence seq_name
increment by n
start with n
maxvalue n
minvalue n
cycle | no cycle
cache | no cache
seq_name.currval
seq_name.nextval
alter sequence seq_name ...
describeuser_sequences
create index index on table (column)
create index index on table (upper(column));
create public synonym synonym_name for object
create user scott identified by tiger
grantpriviligerouser_name | role
create session
create table
create sequence
create view
create role manager
grantpriv to manager
grant manager to user
alter user scott identified by lion;
grantobject_priv on object to user | role [with grant option]
alter
delete
execute
index
insert
references
select
update

3. Anar Godjaev
http://anargodjaev.wordpress.com/
Grant update (department_name ,location_id)
on departments to scott, manager
Set operators:
union
union all //includes duplicate rows
intersect
minus
selectdepartment_id, job_id, sum(salary) from employees where department_id<
60
group by rollup | cube (department_id, job_id);
selectdepartment_id , job_idmanager_id, avg(salary) from employees
group by grouping sets ((department_id, job_id) , (job_id, manager_id));
selectdepartment_id , job_id , sum(salary) from employees where department_id<
60
group by [rollup | cube] (department_id, job_id);
group by grouping sets ((, , , ) , (, , ,))
exists , not exists
alter table employees add (department_name varchar2(14));
update employees e set department_name = (select department_name from
departments.d
wheree.department_id = d.department_id);