Database Developer Question:

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Tell us what are Constraints?

Database Developer Interview Question
Database Developer Interview Question

Answer:

Constraints are used to specify the limit on the data type of the table. It can be specified while creating or altering the table statement. The sample of constraints are:

☛ NOT NULL
☛ CHECK
☛ DEFAULT
☛ UNIQUE
☛ PRIMARY KEY
☛ FOREIGN KEY

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