Oracle 18.1 sql查询错误

Question

我有一个sql查询

SELECT ("SL/VL".TOTAL_SICK_LEAVE - SUM(EMPLOYEE_INFO.DAYS_TAKEN_SICK))
  FROM EMPLOYEE_INFO
  INNER JOIN "SL/VL"
    ON EMPLOYEE_INFO.EMPLOYEE_NAME = "SL/VL".EMPLOYEE_NAME
  where contract_year='Year 1'and
        employee_info.EMPLOYEE_NAME = :P4_EMPLOYEE_NAME
  GROUP BY "SL/VL".TOTAL_SICK_LEAVE

当我使用 oracle apex 5.1 时，它给了我想要的结果。现在，我将数据库升级到 Oracle 18.1，我收到“ORA-20999: Column name "("SL/VL".TOTAL_SICK_LEAVE-SUM(EMPLOYEE_INFO.DAYS_TAKEN_SICK))”对于 LOV SQL 查询无效。请确保您为您的列使用有效的别名。”

Answer 1

18.1 似乎需要表达式 ("SL/VL".TOTAL_SICK_LEAVE - SUM(EMPLOYEE_INFO.DAYS_TAKEN_SICK)) 上的列别名。也许如果你将 SQL 重做为

SELECT (s.TOTAL_SICK_LEAVE - SUM(e.DAYS_TAKEN_SICK)) AS SICK_LEAVE_REMAINING
  FROM EMPLOYEE_INFO e
  INNER JOIN "SL/VL" s
    ON e.EMPLOYEE_NAME = s.EMPLOYEE_NAME
  WHERE CONTRACT_YEAR = 'Year 1' AND
        e.EMPLOYEE_NAME = :P4_EMPLOYEE_NAME
  GROUP BY s.TOTAL_SICK_LEAVE

数据库会更快乐。