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Table A have columns (userID ,

[不定项选择题]
Table A have columns (userID , email) and Table B have columns(UID, email), what’s the correct description for below SQL? (单选)
Select email from A, B where userID=UID
  • Get Table A’s email data
  • Get Table B’s email data
  • Get Table A and B’s email data
  • Has Error when executes this SQL

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