:) SELECT toUInt64(toDateTime('2018-01-02 12:12:22'));
SELECT toUInt64(toDateTime('2018-01-02 12:12:22'))
┌─toUInt64(toDateTime('2018-01-02 12:12:22'))─┐
│ 1514884342 │
└─────────────────────────────────────────────┘
1 rows in set. Elapsed: 0.001 sec.