how many types of keys are there i.e primary key and foreign
key etc..?
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Answer / palzkumar
Piggynet is very close...
Actually there are 3 types of referential integrity constraints (i guess you referring this as keys) are available in DB...
1. Primary Key
2. Unique Key
3. Foreign Key
Composite Primary Key is same as PK, but its applied on combination of 2 or more columns.
-Palz
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / piggynet
Primary key
Foreign key
Composite key
Surrogate key
| Is This Answer Correct ? | 3 Yes | 2 No |
Answer / sowmya
keys r of 4 types. 1.super key , 2.candidate key 3 primary
key 4.foreign key
| Is This Answer Correct ? | 3 Yes | 3 No |
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