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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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
Alter the table so that the column does not allow null
and write a trigger to display custom eror message.
Alter the table so that the column does not allow null..