Question

请问本声明中的错误在哪里，我想更新表1的field1，表2的field2连接字段3上的两个表

UPDATE 
     (SELECT IP_ANAGRAFICACOMPLESSO.id_complesso, COORDOK6.AZIENDA , IP_ANAGRAFICACOMPLESSO.COORD_GB_E,  COORDOK6.WGSE 
      FROM ip_anagraficacomplesso 
      INNER JOIN COORDOK6  ON IP_ANAGRAFICACOMPLESSO.ID_COMPLESSO = COORDOK6.AZIENDA )
SET IP_ANAGRAFICACOMPLESSO.COORD_GB_E = COORDOK6.WGSE

非常感谢

Answer 1

不确定您使用的是哪种SQL，但至少在TSQL中，您需要重新排列它，以便SELECT位于SET之后

UPDATE IP
SET IP.COORD_GB_E = C.WGSE
FROM IP_ANAGRAFLICACOMPLESSO IP
    INNER JOIN COORDOK6 C ON IP.ID_COMPLESSO = C.AZIENDA

Answer 2

要在ORACLE中执行此类UPDATE，您的查询应如下所示。永远记住要创建适当的连接，否则你最终可能会更新错误的记录。

 update DAILY D
  set
    (
      D.DEPARTMENT_CODE,
      D.COSTCENTRE_CODE,
      D.USER_ID
    )
    =
    (select distinct DEPT.DEPT_CODE,
      DEPT.CENTRE_CODE,
      PRT.EMP_ID
    from EMP PRT
    inner join DEPT  DEPT
    on DEPT.DEPARTMENT_ID = PRT.DEPARTMENT_ID
    where PRT.LOGIN_ID     = D.LOGIN_ID
    );

Answer 3

根据此URL，语法为：

http://docs.oracle.com/cd/B19306_01/appdev.102/b14261/update_statement.htm

（ORACLE提供的语法示例）：

   UPDATE employee_temp SET (first_name, last_name) =
  (SELECT first_name, last_name FROM employees
   WHERE employee_id = employee_temp.employee_id);

这将是这样的：您只能选择一列从SELECT子查询 - 确保子查询是有效的INNER JOIN 关于列和表名：

 UPDATE  COORD_GB_E
 SET     IP_ANAGRAFICACOMPLESSO =

 (SELECT COORDOK6.WGSE 
  FROM   ip_anagraficacomplesso INNER JOIN COORDOK6  
  ON     IP_ANAGRAFICACOMPLESSO.ID_COMPLESSO = COORDOK6.AZIENDA );

此文档说明是否有一列正在更新以省略更新列周围的括号。

使用join的oracle语句中的sql update

3 个答案: