MySQL语法查询可一次检查多个值

Question

How do I make this work in MySQL

select (3,5) not in (5,9,8);

where it should return 0 because 5 is in (5,9,8).

Thanks in advance.

Answer 1

To check if any value in "one column" is present in "another column" of "another table".

Using EXISTS

SELECT
      one_column
FROM one_table t1
WHERE EXISTS (
      SELECT NULL
      FROM another_table t2
      WHERE t1.one_column = t2.another_column
      )
;

Note in that example above, the subquery select clause does not need to return any values because "checking for existence" occurs in the where clause of that subquery. However a select clause is needed for correct syntax but really it is just decorative here (and so "select 1" or "select *" may be used instead of "select null").

Using IN()

SELECT
      one_column
FROM one_table
WHERE one_column IN (
      SELECT another_column
      FROM another_table
      )
;

The select clause in this subquery does have to return values for comparison. Be wary of NULLs being returned if using IN().