Database Developer Question:
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Tell us what are Constraints?
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
☛ NOT NULL
☛ CHECK
☛ DEFAULT
☛ UNIQUE
☛ PRIMARY KEY
☛ FOREIGN KEY
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