9
ORA-00904：識別子が無効です
Oracleデータベースを使用して次の内部結合クエリを作成しようとしました。 SELECT Employee.EMPLID as EmpID, Employee.FIRST_NAME AS Name, Team.DEPARTMENT_CODE AS TeamID, Team.Department_Name AS teamname FROM PS_TBL_EMPLOYEE_DETAILS Employee INNER JOIN PS_TBL_DEPARTMENT_DETAILS Team ON Team.DEPARTMENT_CODE = Employee.DEPTID それは以下のエラーを与えます： INNER JOIN PS_TBL_DEPARTMENT_DETAILS Team ON Team.DEPARTMENT_CODE = Employee.DEPTID * ERROR at line 4: ORA-00904: "TEAM"."DEPARTMENT_CODE": invalid identifier 1つのテーブルのDDLは次のとおりです。 CREATE TABLE "HRMS"."PS_TBL_DEPARTMENT_DETAILS" ( "Company Code" …