primary key and foreign key, logic gates ICT
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8 Terms
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Primary key
a field that uniquely identifies each record. It cannot have duplicate values
2
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Foreign key
refers to a primary key of another table. It helps link the two tables together
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AND gate
Both input A and input B have to be 1 for its output to be 1
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OR gate
Either input A or input B has to be 1 for their output to be 1
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NOT gate
Input A has to be 0 for Input Q to be 1
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AND gate
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OR gate
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NOT gate