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select FIRST_NAME,LAST_NAME,SALARY
Case
  When SALARY > 15000 then 'high' 
  When SALARY < 10000 then 'low'
  ELSE 'super low'
  END As salary_group
 from hr.employees

在运行查询时,我得到以下信息:

ORA-00923: FROM keyword not found where expected

桌子

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