What would you use to place a not null constraint on a column? If the column is left blank on insertion, it should display a custom error message.
1. Rule
2. CHECK Contstraint
3. Triggers
4. Alter the table so that the column does not allow null
What would you use to place a not null constraint on a column? If the column is left blank on insertion, it should display a custom error message.
1. Rule
2. CHECK Contstraint
3. Triggers
4. Alter the table so that the column does not allow null
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