How does update work in Cassandra?

Related questions

1. What is eventual consistency in Cassandra?
2. What is frozen in Cassandra?
3. Does Cassandra use consistent hashing?
4. Why are columnar databases faster?
5. How does Cassandra replication work?
6. What is TTL in Cassandra?
7. Is Cassandra a relational database?
8. Is Cassandra key value?
9. What is Cassandra database good for?
10. Why Cassandra is column based?

Tags

1. #returned
2. #clause
3. #error
4. #command
5. #update
6. #filtered
7. #otherwise
8. #updating
9. #table
10. #values
11. #while
12. #column
13. #cassandra
14. #where
15. #after
16. #changed
17. #successfully
18. #means
19. #results
20. #updated