选择非特定类型的列 SQL

Question

我想select BigQuery 中所有非“TIMESTAMP”类型的列。我写了查询，其中 returns 这样的列是：

SELECT COLUMN_NAME 
FROM d1.INFORMATION_SCHEMA.COLUMNS
WHERE
     TABLE_NAME   = 't1' AND
     DATA_TYPE != 'TIMESTAMP'

但我正在努力从 SQL 中的这些列中获取 return 数据，我尝试了以下查询，结果是“标量子查询产生了多个元素”。

SELECT (
SELECT COLUMN_NAME 
FROM d1.INFORMATION_SCHEMA.COLUMNS
WHERE
     TABLE_NAME   = 't1' AND
     DATA_TYPE != 'TIMESTAMP'
) from `d1.t1`;

谁能帮我从 table 't1' 中获取数据类型！=TIMESTAMP 的列？感谢您的期待！

Answer 1

在评论部分应用@Mikhail 的建议，您可以尝试这个查询：

BEGIN
DECLARE col_not_tmstmp STRING;
-- putting the result of your query into a variable
SET  col_not_tmstmp = (SELECT STRING_AGG(COLUMN_NAME) 
FROM <your-project>.<your-dataset>.INFORMATION_SCHEMA.COLUMNS
WHERE
     TABLE_NAME   = '<your_table>' AND
     DATA_TYPE != 'TIMESTAMP');

-- use execute immediate to apply the variable to main query
EXECUTE IMMEDIATE FORMAT (""" 
SELECT %s 
FROM  `<your-project>.<your-dataset>.<your_table>` 
""", col_not_tmstmp
);
END

Table:

输出：

选择非特定类型的列 SQL

selecting columns which are NOT of a specific type SQL

sql

google-bigquery