no    constraints                    Specifies…1        Not null       A column can’t have a NULL value.2        unique   ...
Oracle  constraints
Oracle  constraints
Oracle  constraints
Oracle  constraints
Oracle  constraints
Oracle  constraints
Oracle  constraints
Oracle  constraints
Oracle  constraints
Oracle  constraints
Oracle  constraints
Oracle  constraints
Oracle  constraints
Oracle  constraints
Oracle  constraints
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Oracle constraints

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Oracle constraints

  1. 1. no constraints Specifies…1 Not null A column can’t have a NULL value.2 unique A column can’t have a duplicate value.3 Primary key A column can’t have a NULL as well as duplicate value.4 Foreign key Limited INSERT and UPDATE operation detail table.5 check A column must follow a specified condition.
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