Home
Oracle PL / SQL
Aggregate Functions
Analytical Functions
Char Functions
Constraints
Conversion Functions
Cursor
Data Type
Date Timezone
Hierarchical Query
Index
Insert Delete Update
Large Objects
Numeric Math Functions
Object Oriented Database
PL SQL
Regular Expressions
Report Column Page
Result Set
Select Query
Sequence
SQL Plus
Stored Procedure Function
Subquery
System Packages
System Tables Views
Table
Table Joins
Trigger
User Previliege
View
XML
Unique « Constraints « Oracle PL / SQL
Oracle PL / SQL
Constraints
Unique
1.
if a column is not explicitely defined as not null, nulls can be inserted multiple times
2.
Vialate the unique contraint: try to insert the same value
3.
A unique constraint can be extended over multiple columns
4.
Add unique containt to a varchar2 type column
5.
Create a table with 'unique deferrable initially immediate'
6.
Add unique constraints
7.
ORA-00001: unique constraint (JAVA2S.JOB_UNIQUE_IN_TEAMID) violated
8.
Setting a Unique Constraint
9.
Unique value column