redis命令参考(四) set集合

A set is similar to a list, except it does not have a specific order and each element may only appear once.

Some of the important commands in working with sets are SADD,SREM, SISMEMBER, SMEMBERS and SUNION.

一、SADD

二、SREM

三、SISMEMBER

四、SMEMBERS

五、SUNION

> sadd mySet2 apple //创建mySet2，并添加元素
(integer) 1
> sadd mySet2 banana
(integer) 1

> srem mySet football //删除元素

> smembers mySet   //显示当前集合下的所有元素
1) "basketball"
2) "football"
3) "volleyball"
> smembers mySet2
1) "banana"
2) "apple"
3) "kiwifruit"
> sunion mySet mySet2  //显示mySet集合 和 mySet2 的并集
1) "volleyball"
2) "football"
3) "apple"
4) "basketball"
5) "banana"
6) "kiwifruit"

六、SISMEMBER

> sismember mySet football   //判断mySet下是否有football元素
(integer) 1