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ZUNIONSTORE

Note

Official reference: ZUNIONSTORE.

Store a union with aggregated scores.

Syntax​

ZUNIONSTORE destination numkeys key [key ...] [WEIGHTS weight [weight ...]] [AGGREGATE SUM|MIN|MAX]

numkeys must match the number of following source keys.

WEIGHTS supplies one weight per source key, in key order; the default is 1. AGGREGATE chooses sum, minimum or maximum, default SUM.

The result overwrites the destination; an empty result removes it.

Results​

ReturnRowsContent
Update count--Number of elements in the resulting sorted set.

Example​

ZADD demo:ranking 10 alice 20 bob
ZADD demo:other 30 alice
ZUNIONSTORE demo:all 2 demo:ranking demo:other WEIGHTS 1 2 AGGREGATE MAX