redis HMGET command
Translation results：
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 commandsyntax
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 commandexample
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