sql - 从存储过程更新表

Question

有我更新表的存储过程：

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更新工作的所有参数时。现在我想更新表格，所以如果我不输入所有要更新的值，更新后，只有我引入的和没有引入的保持不变。

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 语句以从表中提取所有值。

此外，您验证传递给存储过程的所有值，如果它们为空，则在更新语句中使用选定的值。