SQL Notes on Constraints
Attribute Constraints Data that is entered into a row must be a certain attribute Type CASTs CAST is to change the attribute to something else For example, if a number is saved as a string (‘5’), you can cast it onto an
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Attribute Constraints Data that is entered into a row must be a certain attribute Type CASTs CAST is to change the attribute to something else For example, if a number is saved as a string (‘5’), you can cast it onto an