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                Redis EXISTS命令被用來檢查鍵是否存在于redis。 ## 返回值 整數值 * 1, 如果鍵存在。 * 0, 如果鍵不存在。 ## 語法 Redis exists命令的基本語法,如下所示: ~~~ redis 127.0.0.1:6379> EXISTS KEY_NAME ~~~ ### 例子 ~~~ redis 127.0.0.1:6379> EXISTS yiibai-new-key (integer) 0 ~~~ 現在,創建名為yiibai新建一個鍵并檢查是否存在。 ~~~ redis 127.0.0.1:6379> EXISTS yiibai-new-key (integer) 1 ~~~
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