[22P02] ERROR: invalid input syntax for type json Detail: Expected end of input, but found ",".Position: 106 Where: JSON data, line 1: "obs_eng_status_faild",...
我需要在一个特定的列'content_id'of key space user_rating in Cassandra‘中计算不同的行数。我使用了两个查询,但得到了如下错误:
1. `cqlsh:recommendation_engine> SELECT DISTINCT(COUNT(content_id)) FROM user_rating;`
2. `select count (distinct c