如果间隔不是“满”，如何使OVER()中的结果为空？

SELECT column1, column2, 
       CASE WHEN interval <> '满' THEN NULL ELSE OVER(...) END AS result
FROM table_name;

SELECT column1, column2, 
       ROW_NUMBER() OVER (PARTITION BY column1 ORDER BY column2) AS row_num,
       ...
FROM table_name
WHERE interval = '满' AND row_num > 0;

SELECT column1, column2, 
       OVER(...) AS result
FROM (
    SELECT column1, column2
    FROM table_name
    WHERE interval = '满'
) subquery;