英[mu:v] 美[muv]
vt.& vi.Move, move
vi.Action; moving; progress; (machine, etc.) starting
vt.Propose; move; shake; change
n.Change;migrate
Third person singular: moves Plural: moves Present participle: moving Past tense: moved Past participle: moved
redis MOVE command syntax
Function:Move the key of the current database to the given database db.
Syntax: MOVE key db
Description: If the current database (source database) and the given database (target database) have the same name Given key , or key does not exist in the current database, then MOVE has no effect. Therefore, you can also take advantage of this feature and treat MOVE as a locking primitive.
Available versions: >= 1.0.0
Time complexity: O(1)
Return: Returns 1 if the move is successful, 0 if it fails.
redis MOVE command example
# key 存在于當前數據庫 redis> SELECT 0 # redis默認使用數據庫 0,為了清晰起見,這里再顯式指定一次。 OK redis> SET song "secret base - Zone" OK redis> MOVE song 1 # 將 song 移動到數據庫 1 (integer) 1 redis> EXISTS song # song 已經被移走 (integer) 0 redis> SELECT 1 # 使用數據庫 1 OK redis:1> EXISTS song # 證實 song 被移到了數據庫 1 (注意命令提示符變成了"redis:1",表明正在使用數據庫 1) (integer) 1 # 當 key 不存在的時候 redis:1> EXISTS fake_key (integer) 0 redis:1> MOVE fake_key 0 # 試圖從數據庫 1 移動一個不存在的 key 到數據庫 0,失敗 (integer) 0 redis:1> select 0 # 使用數據庫0 OK redis> EXISTS fake_key # 證實 fake_key 不存在 (integer) 0 # 當源數據庫和目標數據庫有相同的 key 時 redis> SELECT 0 # 使用數據庫0 OK redis> SET favorite_fruit "banana" OK redis> SELECT 1 # 使用數據庫1 OK redis:1> SET favorite_fruit "apple" OK redis:1> SELECT 0 # 使用數據庫0,并試圖將 favorite_fruit 移動到數據庫 1 OK redis> MOVE favorite_fruit 1 # 因為兩個數據庫有相同的 key,MOVE 失敗 (integer) 0 redis> GET favorite_fruit # 數據庫 0 的 favorite_fruit 沒變 "banana" redis> SELECT 1 OK redis:1> GET favorite_fruit # 數據庫 1 的 favorite_fruit 也是 "apple"