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QWhich DDL statement is used to add a unique constraint to a column in MySQL?

ID: #15462 Data definition language - MySQL 106 views
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#15462Q ID
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Data definition language - MySQLTopic
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  • A ADD UNIQUE ✔ ✖
  • B CREATE UNIQUE ✔ ✖
  • C UNIQUE KEY ✔ ✖
  • D ALTER CONSTRAINT ✔ ✖
Correct Answer: Option C

Explanation

The UNIQUE KEY statement in MySQL is used to add a unique constraint to a column in a table. It ensures that the values in the column are unique across all rows.

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