从存储过程更新表

Question

我有更新表格的存储过程：

UPDATE myTbl
SET [first_name] = @first_name,  
    [second_name] = @second_name,  
    [faculty] = @faculty,
    [age] = @age
    WHERE [id] = @id 

当我调用存储过程并传递所有更新的参数时。现在我想更新表，所以如果我没有输入要更新，更新的所有值，只有我介绍的那些，以及未引入的值保持不变。

Answer 1

UPDATE myTbl
SET [first_name] = IsNull(@first_name, first_name),  
    [second_name] = IsNull(@second_name, second_name),  
    [faculty] = IsNull(@faculty, faculty),
    [age] = IsNull(@age, age),
    WHERE [id] = @id 

Answer 2

UPDATE myTbl
SET
    [first_name] = ISNULL(@first_name,  [first_name])
    , [second_name] = ISNULL(@second_name,  [second_name])
    , [faculty] = ISNULL(@faculty, [faculty])
    , [age] = ISNULL(@age, [age])
WHERE [id] = @id 

Answer 3

在运行更新之前，您可以运行SELECT语句从表中提取所有值。

此外，您验证传递给存储过程的所有值，如果它们为null，则使用更新语句中的选定值。