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ClickHouse code style recommends unsigned in every case when you don't need the sign: https://clickhouse.com/docs/development/style https://clickhouse.com/docs/

• dataflown 3mo ago
  No. It says the reverse: "11. unsigned. Use unsigned if necessary." Unsigned is necessary only if you're working with bit fields, bit masks or require explicit modulo n-bit arithmetic. For all other cases, use signed