What are the states of ORACLE constraints

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There are four states of ORACLE constraint. When creating a constraint, you should choose to use it according to your business situation:

1.enable validate: this is the default state. Indicates that the original data should meet the constraints and the newly inserted data should meet the constraints.

2.enable novalidate: indicates that the original data is not checked and the newly inserted data should meet the constraints.

3.disable validate: indicates that the original data should meet the constraints and does not check the newly inserted data.

4.disable novalidate: the constraint is disabled, which means that the original data is not checked, and the newly inserted data is not checked.

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