The correct answer is b. DUPLICATE. This is not a type of SQL constraint. The other options, UNIQUE, CHECK, and FOREIGN KEY, are all types of constraints in SQL.

Here's a brief explanation of each:

a. UNIQUE: This constraint ensures that all values in a column are different.

b. DUPLICATE: This is not a SQL constraint. There's no constraint in SQL that allows or ensures duplicate values.

c. CHECK: This constraint ensures that all values in a column satisfy certain conditions.

d. FOREIGN KEY: This constraint is used to prevent actions that would destroy links between tables.

Question

The correct answer is b. DUPLICATE. This is not a type of SQL constraint. The other options, UNIQUE, CHECK, and FOREIGN KEY, are all types of constraints in SQL.

Here's a brief explanation of each:

a. UNIQUE: This constraint ensures that all values in a column are different.

b. DUPLICATE: This is not a SQL constraint. There's no constraint in SQL that allows or ensures duplicate values.

c. CHECK: This constraint ensures that all values in a column satisfy certain conditions.

d. FOREIGN KEY: This constraint is used to prevent actions that would destroy links between tables.

Knowee AI · Accepted Answer

The correct answer is b. DUPLICATE. This is not a type of SQL constraint. The other options, UNIQUE, CHECK, and FOREIGN KEY, are all types of constraints in SQL.

Here's a brief explanation of each:

a. UNIQUE: This constraint ensures that all values in a column are different.

b. DUPLICATE: This is not a SQL constraint. There's no constraint in SQL that allows or ensures duplicate values.

c. CHECK: This constraint ensures that all values in a column satisfy certain conditions.

d. FOREIGN KEY: This constraint is used to prevent actions that would destroy links between tables.

Which of the following is not a type of SQL constraint?Select one:a. UNIQUEb. DUPLICATEc. CHECKd. FOREIGN KEY

Question

Solution

Similar Questions

Upgrade your grade with Knowee