UPSERT with Update

gistfile1.txt

cqlsh:demo> DESC upsert_test ;

CREATE TABLE demo.upsert_test (
    name text PRIMARY KEY,
    title text
) WITH bloom_filter_fp_chance = 0.01
    AND caching = {'keys': 'ALL', 'rows_per_partition': 'NONE'}
    AND comment = ''
    AND compaction = {'class': 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy', 'max_threshold': '32', 'min_threshold': '4'}
    AND compression = {'chunk_length_in_kb': '64', 'class': 'org.apache.cassandra.io.compress.LZ4Compressor'}
    AND crc_check_chance = 1.0
    AND dclocal_read_repair_chance = 0.1
    AND default_time_to_live = 0
    AND gc_grace_seconds = 864000
    AND max_index_interval = 2048
    AND memtable_flush_period_in_ms = 0
    AND min_index_interval = 128
    AND read_repair_chance = 0.0
    AND speculative_retry = '99PERCENTILE';

cqlsh:demo> SELECT * from upsert_test ;

 name | title
------+-------

(0 rows)
cqlsh:demo> UPDATE upsert_test SET title = 'TL' WHERE name = 'Anshul';
cqlsh:demo> SELECT * from upsert_test ;

 name   | title
--------+-------
 Anshul |    TL

(1 rows)
cqlsh:demo> UPDATE upsert_test SET title = null WHERE name = 'Anshul';
cqlsh:demo> SELECT * from upsert_test ;

 name | title
------+-------

(0 rows)