Add unique containt to a varchar2 type column : Unique « Constraints « Oracle PL / SQL

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Oracle PL / SQL » Constraints » Unique

Add unique containt to a varchar2 type column


   

SQL>

SQL> create table inventory(

  2  partno number(4) constraint invent_partno_pk primary key,

  3  partdesc varchar2(35) constraint invent_partdesc_uq unique);



Table created.



SQL>

SQL>

SQL>

SQL> drop table inventory;



Table dropped.



SQL>

Related examples in the same category

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.	Create a table with 'unique deferrable initially immediate'
5.	Add unique constraints
6.	ORA-00001: unique constraint (JAVA2S.JOB_UNIQUE_IN_TEAMID) violated
7.	Setting a Unique Constraint
8.	Unique value column

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