Computer Science

Which of the following types of table constraints will prevent the entry of duplicate rows?
Unique
Distinct
Primary Key
NULL

SQL Queries

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Answer

Primary Key

Reason — A primary key is a set of one or more attributes or fields that uniquely identifies a tuple or row in a table. Therefore, it ensures that each row in the table is unique and prevents the entry of duplicate rows.

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Computer Science

Which of the following types of table constraints will prevent the entry of duplicate rows?
Unique
Distinct
Primary Key
NULL

SQL Queries

Answer

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Computer Science

Which of the following types of table constraints will prevent the entry of duplicate rows?UniqueDistinctPrimary KeyNULL

SQL Queries

Answer

Related Questions

Which clause is used in query to place the condition on groups in MySQL?WHEREHAVINGGROUP BYBoth (i) & (ii)

Which of the following is a DDL command?SELECTALTERINSERTUPDATE

…………… command is used to remove primary key from a table in SQL.UpdateRemoveAlterDrop

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Which of the following types of table constraints will prevent the entry of duplicate rows?
Unique
Distinct
Primary Key
NULL

Which clause is used in query to place the condition on groups in MySQL?
WHERE
HAVING
GROUP BY
Both (i) & (ii)

Which of the following is a DDL command?
SELECT
ALTER
INSERT
UPDATE

…………… command is used to remove primary key from a table in SQL.
Update
Remove
Alter
Drop

Which of the following commands will delete the table from MYSQL database ?
DELETE TABLE
DROP TABLE
REMOVE TABLE
ALTER TABLE