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What is referential integrity?
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Answer / sadiq afroze
Referential integrity refers to the consistency that must be
maintained between primary and foreign keys, i.e. every
foreign key value must have a corresponding primary key value
| Is This Answer Correct ? | 22 Yes | 5 No |
Answer / renu gupta
Referential integrity refers to the consistency that must
be maintained between primary and foreign keys.
1.An insert into primary key table cannot violate
referential integrity and no checking is required
2.A deletion of foreign key value can not violate
referential integrity and no checking is required
3.Changes in primary key is allowed only when those values
are not in foreign key.
4.Insert and updates in foreign key is allowed only when it
has a matching value in primary key
5. If RESTRICT is specified on foreign key definition,
deletion of primary key is not allowed
6. If CASCADE is specified, both primary and foerign keys
values can be deleted together only
7. If SET NULL is specified, then the foreign key value is
set null , provided nulls are allowed in the foreign key
column
| Is This Answer Correct ? | 12 Yes | 4 No |
Answer / raghavendra k
For every Foriegn Key value in child table, there must be
same value is present in primary key column of parent table.
| Is This Answer Correct ? | 6 Yes | 3 No |
Answer / pranab kumar mohanty
The relation of the primary key of a base table with
foreign key of the reference table is known as referential
integriety.
| Is This Answer Correct ? | 5 Yes | 2 No |
Answer / guest
It is used relate more than table using RDBMS.For example
if you two table TAB1,TAB2.TAB1 which has column empno with
value ,TAB2 which has same value as previous mentioned TAB1
value.
Row in one table that are related Row in another table .
| Is This Answer Correct ? | 4 Yes | 4 No |
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