A constraint is applied to a row and not a column
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Keep practicing — related questions
- Constraints can be specified after a table is created
- CONSTRAINTS can be specified only on Creation of a table.
- Can we have multiple check constraints on a single column of a table.
- NOT NULL constraint can be added using MODIFY clause of ALTER TABLE statement
- NULL values violate CHECK constraint
- The columns with unique constraint allows more than one null values to be inserted.
- It is possible to create a constraints on the existing tables by creating new column
- Using SQL it is possible to create