Database Reference
In-Depth Information
UPDATE "users"
SET "email" = 'alice@gmail.com',
"encrypted_password" =
0x8914977ed729792e403da53024c6069a9158b8c4
WHERE "username" = 'alice';
In both cases, the query simply instructs Cassandra to set the
email
and
encryp-
ted_password
columns to the given values in the row whose primary key is
alice
.
INSERT
and
UPDATE
are not entirely redundant; however, each provides certain capabil-
ities that the other does not. For instance, only
INSERT
supports the
IF NOT EXISTS
clause that we explored earlier.
UPDATE
queries also have distinctive functionality, not
the least of which is conditional updates.
