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Oracle认证考试

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EXHIBIT, Emp Table Exhibit A Exhibit B Examine the data from the EMP table. Evaluate this SQL statement: SELECT * FROM emp WHERE emp _ id = 3); WHERE commission = (SELECT commission FROM emp What is the result when the query is executed?()

  • A、Exhibit A
  • B、Exhibit B 
  • C、The query returns no rows 
  • D、The query fails because the outer query is retrieving more than one column
  • E、The query fails because both the inner and outer queries are retrieving data from the same table.
正确答案:C
答案解析:
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