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P#5 difference between primary and unique key constraints in oracle SQL - interview question

Tutorial on what is the difference between Primary key and Unique key this frequently asked question will help you in Oracle SQL database interview question

This will clear few concepts of Constraint and over here the difference between Primary and unique key in oracle explained with the example or where to use Primary Key and where to use Unique Key in Oracle sql
This will cover the Following question:
1) Primary key V/s unique key
2) primary and unique
3) primary and unique key in sql
4) difference between primary and unique key with example
5) difference between the primary and unique key in oracle
6) constraints in oracle
7) constraints in oracle with example
8) how to check constraints on a table in oracle ( will cover latter)
9) constraints in SQL

how to find constraints on a table in
desc table name

drop constraint sql server

alter table tablename drop constraint constraintName;

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26 ноября 2018 г. 20:19:31
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