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Micky5490! Micky5490!
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6 years ago
When modifying data in existing columns, which of the following is correct?
 a. A column must be as wide as the data it already contains.
  b. If a NUMBER column already contains data, its precision and scale can be decreased.
   c. Changing the default value of a column will change the values of data already in a table.
   d. If a NUMBER column is empty, its precision and scale cannot be changed.
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Beka128Beka128
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