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                # HDEL **HDEL key field [field ...]** 刪除哈希表 `key` 中的一個或多個指定域,不存在的域將被忽略。 Note 在Redis2.4以下的版本里, [HDEL](#hdel) 每次只能刪除單個域,如果你需要在一個原子時間內刪除多個域,請將命令包含在 [_MULTI_](../transaction/multi.html#multi) / [_EXEC_](../transaction/exec.html#exec) 塊內。 **可用版本:** &gt;= 2.0.0 **時間復雜度:** O(N), `N` 為要刪除的域的數量。 **返回值:** 被成功移除的域的數量,不包括被忽略的域。 ``` # 測試數據 redis> HGETALL abbr 1) "a" 2) "apple" 3) "b" 4) "banana" 5) "c" 6) "cat" 7) "d" 8) "dog" # 刪除單個域 redis> HDEL abbr a (integer) 1 # 刪除不存在的域 redis> HDEL abbr not-exists-field (integer) 0 # 刪除多個域 redis> HDEL abbr b c (integer) 2 redis> HGETALL abbr 1) "d" 2) "dog" ```
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