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Question 7Fill in the blank: The SQL command _____ is irreversible, so data analysts should consider whether data should be backed up before using it.1 pointCREATE TABLE IF NOT EXISTSDROP TABLE IF EXISTS INSERT INTO UPDATE

Question

Question 7Fill in the blank: The SQL command _____ is irreversible, so data analysts should consider whether data should be backed up before using it.1 pointCREATE TABLE IF NOT EXISTSDROP TABLE IF EXISTS INSERT INTO UPDATE

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Solution

Para responder a la pregunta, primero debemos entender el propósito de cada comando SQL mencionado:

  1. CREATE TABLE IF NOT EXISTS: Este comando se utiliza para crear una nueva tabla solo si no existe ya en la base de datos. No es irreversible, ya que no elimina datos existentes.
  2. DROP TABLE IF EXISTS: Este comando se utiliza para eliminar una tabla si existe. Es irreversible porque elimina la tabla y todos los datos contenidos en ella.
  3. INSERT INTO: Este comando se utiliza para insertar nuevos registros en una tabla. No es irreversible, ya que solo agrega datos.
  4. UPDATE: Este comando se utiliza para modificar registros existentes en una tabla. No es irreversible, ya que solo cambia los datos existentes.

Dado que la pregunta se refiere a un comando irreversible que podría requerir una copia de seguridad de los datos antes de su uso, la respuesta correcta es:

DROP TABLE IF EXISTS

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