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zhamila zhamila
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6 years ago
What will happen if you try to use the INSERT command to insert a NULL value into a column that has been assigned a PRIMARY KEY constraint?
 a. The command will execute because a PRIMARY KEY value can be NULL.
  b. An error message is returned and the row is not added to the table.
  c. The command will execute because only a UNIQUE constraint forbids NULL values.
   d. An error message is returned but the unaffected portion of the row is added to the table.
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thundercats33thundercats33
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6 years ago
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zhamila Author
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6 years ago
This site is awesome
smdavis
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Yesterday
Brilliant ツ
nicolepope23
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2 hours ago
Smart ... Thanks!
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