Which command can be used to determine whether or not a column is allowed to contain a NULL value?
A) DISPLAY_CONSTRAINTS
B) DESCRIBE
C) DEFINED_CONSTRAINTS
D) DISPLAY

Name: Which command can be used to determine whether or not a column is allowed to contain a NULL value? A) DISPLAY_CONSTRAINTS B) DESCRIBE C) DEFINED_CONSTRAINTS D) DISPLAY
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Question

Which command can be used to determine whether or not a column is allowed to contain a NULL value?​
A) ​DISPLAY_CONSTRAINTS
B) ​DESCRIBE
C) ​DEFINED_CONSTRAINTS
D) ​DISPLAY

Quizplus · Accepted Answer

The DESCRIBE command is used in SQL to find the structure of a table, including whether a column can contain NULL values.

Which Command Can Be Used to Determine Whether or Not