Oracle SQL - 仅更新过程非空值

Question

我有一个简单的更新程序。因此，我希望更新仅字段，它们不是空值。我该怎么做？

  PROCEDURE UpdateCustomerInfo(
      CustomerID                 IN NUMBER,
      CustomerType                 IN VARCHAR2,
      CustomerName        IN VARCHAR2,
      CustomerGender          IN VARCHAR2,
      CustomerBirthday        IN DATE)
  AS
  BEGIN
    UPDATE CUSTOMER_INFO
    SET CUSTOMER_TYPE =CustomerType,
     CUSTOMER_NAME =CustomerName,
     CUSTOMER_GENDER =CustomerGender,
     CUSTOMER_BIRTHDAY =CustomerBirthday
    WHERE CUSTOMER_ID = CustomerID;
    COMMIT;

  END CUSTOMER_INFO

谁能帮帮我？

谢谢

Answer 1

UPDATE CUSTOMER_INFO
   SET CUSTOMER_TYPE     = NVL(CustomerType, CUSTOMER_TYPE),
       CUSTOMER_NAME     = NVL(CustomerName, CUSTOMER_NAME),
       CUSTOMER_GENDER   = NVL(CustomerGender, CUSTOMER_GENDER),
       CUSTOMER_BIRTHDAY = NVL(CustomerBirthday, CUSTOMER_BIRTHDAY)
 WHERE CUSTOMER_ID = CustomerID;

应该这样做。如果第一个参数是 NULL，NVL 函数将 return 第二个参数。因此，如果 CustomerType 参数是 NULL，CUSTOMER_TYPE 列将更新为具有它已有的值。您仍在执行更新（例如生成重做）但您没有更改数据。

Oracle SQL - 仅更新过程非空值

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