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redis HMGET command

Chinese translationRecent Updates：2018-05-16 10:56:24

get

英[get] 美[ɡɛt]

vt. Get; catch; persuade; receive (punishment, etc.)

vt.& vi. Arrive, come

vi. Become; start; try to deal with; obtain benefits or wealth

n. Reproduce, cub; profit

Third person singular : gets present participle: getting past tense: got past participle: got gotten

redis HMGET command Video explanation

redis HMGET command syntax

Function: Return the value of one or more given fields in the hash table key.

Syntax: HMGET key field [field ...]

Description: If the given field does not exist in the hash table, then Returns a nil value. Because a non-existent key is treated as an empty hash table, a HMGET operation on a non-existent key will return a table with only nil values.

Available versions: >= 2.0.0

Time complexity: O(N), N is the number of given domains.

Returns: A table containing associated values for multiple given fields. The table values are arranged in the same order as the request order for the given field parameters.

redis HMGET command example

redis> HMSET pet dog "doudou" cat "nounou"    # 一次设置多个域
OK
redis> HMGET pet dog cat fake_pet             # 返回值的顺序和传入参数的顺序一样
1) "doudou"
2) "nounou"
3) (nil)                                      # 不存在的域返回nil值

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