Using SQL, you can increase the length of an existing table column but you cannot decrease the length of a column.

Name: Using SQL, you can increase the length of an existing table column but you cannot decrease the length of a column.
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Quizplus · Accepted Answer

SQL allows altering the length of an existing table column both to increase and decrease, provided the data already in the column fits the new size constraints.

Using SQL, You Can Increase the Length of an Existing