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# Redis Hsetnx Command [!(#) Redis Hash](#) The Redis Hsetnx command is used to assign a value to a field that does not exist in the hash table. If the hash table does not exist, a new hash table is created and an HSET operation is performed. If the field already exists in the hash table, the operation is ineffective. If the key does not exist, a new hash table is created and the HSETNX command is executed. ### Syntax The basic syntax of the redis Hsetnx command is as follows: redis 127.0.0.1:6379> HSETNX KEY_NAME FIELD VALUE ### Available Version >= 2.0.0 ### Return Value Returns 1 if the setting is successful. Returns 0 if the given field already exists and no operation is performed. ### Example redis 127.0.0.1:6379> HSETNX myhash field1 "foo" (integer) 1 redis 127.0.0.1:6379> HSETNX myhash field1 "bar" (integer) 0 redis 127.0.0.1:6379> HGET myhash field1 "foo" redis 127.0.0.1:6379> HSETNX nosql key-value-store redis (integer) 1 redis 127.0.0.1:6379> HSETNX nosql key-value-store redis # Operation invalid, key-value-store already exists (integer) 0 [!(#) Redis Hash](#)