Google bigquery BigQuery-为什么我必须按所有列分组？

以下查询的错误消息：

SELECT
  sample_id,
  IF(PIK3CA_features = "chr3_3930069__TGT", 1, 0) AS chr3_3930069__TGT,
  IF(PIK3CA_features = "chr3_3929921_TC", 1, 0) AS chr3_3929921_TC,
  IF(PIK3CA_features = "chr3_3929739_TC", 1, 0) AS chr3_3929739_TC,
  IF(PIK3CA_features = "chr3_3929813__T", 1, 0) AS chr3_3929813__T,
  IF(PIK3CA_features = "chr3_3929897_GA", 1, 0) AS chr3_3929897_GA,
  IF(PIK3CA_features = "chr3_3929843_TC", 1, 0) AS chr3_3929843_TC
FROM
  [pgp_PIK3CA_all_distinct_features_values]
GROUP BY
  sample_id

是:

错误：（L3:58）：表达式“chr3_3930069___TGT”不存在于 按列表分组

---

如何仅按样本ID进行分组，以便在行中有唯一的样本ID，在列中有PIK3CA功能？

您没有按样本ID对所有列进行分组的聚合功能。您可以向其中添加max，这应该可以解决问题

SELECT
  sample_id,
  MAX(IF(PIK3CA_features = "chr3_3930069__TGT", 1, 0)) AS chr3_3930069__TGT,
  MAX(IF(PIK3CA_features = "chr3_3929921_TC", 1, 0)) AS chr3_3929921_TC,
  MAX(IF(PIK3CA_features = "chr3_3929739_TC", 1, 0)) AS chr3_3929739_TC,
  MAX(IF(PIK3CA_features = "chr3_3929813__T", 1, 0)) AS chr3_3929813__T,
  MAX(IF(PIK3CA_features = "chr3_3929897_GA", 1, 0)) AS chr3_3929897_GA,
  MAX(IF(PIK3CA_features = "chr3_3929843_TC", 1, 0)) AS chr3_3929843_TC
FROM
  [pgp_PIK3CA_all_distinct_features_values]
GROUP BY
  sample_id

---

您是否正在尝试获取

sample\u id

的每个表达式的计数？你能编辑你的帖子并添加预期的输出吗？