Database Reference
In-Depth Information
4.
To view list of rows in the
users
column family (see
Figure 2-6
), use
the following command:
select * from users;
Figure 2-6
.
Map containing followers for user
5.
To add
'team_marketing'
as a follower for
'ritaf'
and vice
versa (see
Figure 2-7
), we can simply add it as an element in
users
column family:
update users set followers = followers +
{'team_marketing':'apress marketing'} where
twitter_id='ritaf';
update users set followers = followers +
{'ritaf':'rita fernando'} where
twitter_id='apress_marketing';
Figure 2-7
.
After update map of followers for each user
6.
Using
update
would work as an insert if row key doesn't exist in
the database. For example,
update users set followers = followers +
{'ritaf':'rita fernando'} where
twitter_id='jhassell';
// update as insert
