大查询中的正确案例

Question

我在Big Query的“香蕉”列中有这句话“我想买香蕉”。

我想获得“我想购买香蕉”。我怎么了 当我看到LOWER和UPPER时，我期待的是PROPER（Bananas）函数，但似乎不支持PROPER大小写吗？

DZ

Answer 1

下面的示例是fr BigQuery Standrad SQL

#standradSQL
CREATE TEMP FUNCTION PROPER(str STRING) AS (( 
  SELECT STRING_AGG(CONCAT(UPPER(SUBSTR(w,1,1)), LOWER(SUBSTR(w,2))), ' ' ORDER BY pos) 
  FROM UNNEST(SPLIT(str, ' ')) w WITH OFFSET pos
));
WITH `project.dataset.table` AS (
  SELECT 'i Want to buy bananas' str
)
SELECT str, PROPER(str) proper_str
FROM `project.dataset.table`  

结果是

Row str                     proper_str   
1   i Want to buy bananas   I Want To Buy Bananas