在大查询中的特定列中查找所有具有空值的行

Question

是否可以改善以下内容？我需要计算特定列中具有NULL个值的所有行。

SELECT
  SUM(IF(column1 IS NULL, 1, 0)) AS column1, 
  SUM(IF(column2 IS NULL, 1, 0)) AS column2
FROM 
  `dataset.table`;

Answer 1

其中一个选项：

   

#standardSQL
SELECT
  COUNTIF(column1 IS NULL) AS column1,
  COUNTIF(column2 IS NULL) AS column2
FROM `project.dataset.table`   

或者（只是为您提供一些选择）：

#standardSQL
SELECT
  COUNT(1) - COUNT(column1) AS column1,
  COUNT(1) - COUNT(column2) AS column2
FROM `project.dataset.table`