“in”语句中的多个列（mysql）

Question

请告诉我如何实现这个SQL查询：

select * from products where (category, category2, category3) in (2, 138, 136, 125)

错误：

#1241 - Operand should contain 3 column(s)

Answer 1

只需在where子句中写下所有列，如下所示：

SELECT *
FROM products
WHERE
  category IN (2, 138, 136, 125) OR
  category2 IN (2, 138, 136, 125) OR
  category3 IN (2, 138, 136, 125)

Answer 2

select * from products 
where category in (2, 138, 136, 125)
      OR 
      category2 in (2, 138, 136, 125)
      OR
      category3 in (2, 138, 136, 125)

Answer 3

嗯，这是你打算做的吗？

select * from products where category in (2, 138, 136, 125)
                         AND category2 in (2, 138, 136, 125)
                         AND category3 in (2, 138, 136, 125)

或OR，取决于要求。