根据SQL中的主键更新一列的多行

Question

I know that I want to update only one row from a column I use this statement 我知道我只想更新使用此语句的列中的一行

UPDATE Customers
    SET ContactName = 'Alfred Schmidt'
    WHERE CustomerID = 1;

but what if I want to update multiple for example 5 rows based on primary key value? 但是如果我想基于主键值更新多个（例如5行）怎么办？

Answer 1

The IN operator allows you to specify multiple values in a WHERE clause. IN运算符允许您在WHERE子句中指定多个值。

Example: 例：

As in this: 像这样：

SELECT *
FROM Customers
WHERE Customer_id IN (5000, 7000, 8000, 9000);

format: 格式：

expression IN (value1, value2, .... value_n);

In the mentioned case : 在上述情况下：

UPDATE Customers
    SET ContactName = 'Alfred Schmidt'
    WHERE CustomerID IN(12, 156);