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Use SINTERCARD to get the number of members that the given sets have in common, without building the intersection. <numkeys> states how many keys follow. LIMIT stops counting once that many common members have been found and returns the limit, which turns an expensive full intersection into a cheap “do these sets share at least N members” test. LIMIT 0 means no limit. Since nothing is transferred beyond the count, this is much lighter than running SINTER and measuring the reply.

Syntax

Arguments

Important points

  • numkeys must equal the number of key arguments that immediately follow it.

Response

The reply reports the result of the operation. Error replies have the same shape in RESP2 and RESP3 and are surfaced as exceptions by the SDKs below.
Client libraries often decode bulk strings, maps, sets, and numeric strings into language-native values. The table describes the Redis wire reply.

Examples

TCP examples use the TLS REDIS_URL from the Upstash console. REST examples use UPSTASH_REDIS_REST_URL and UPSTASH_REDIS_REST_TOKEN.
This command is not supported yet in upstash_redis.

Related topics

Changelog