Redis 学习笔记Set操作

Posted 2021-06-16 Adorable_Rocy

1.sadd key val

127.0.0.1:6379> sadd list hello  				# 添加内容
(integer) 1
127.0.0.1:6379> sadd list world
(integer) 1
127.0.0.1:6379> 

2.smembers key

127.0.0.1:6379> SMEMBERS list  					# 查看内容
1) "world"
2) "hello"
127.0.0.1:6379> 

3.sismember key val

127.0.0.1:6379> SISMEMBER list hello 
(integer) 1
127.0.0.1:6379> SISMEMBER list welcome   			# 判断key中是否含有这个值
(integer) 0
127.0.0.1:6379> 

4.scard key

127.0.0.1:6379> SCARD list   			# 	查看元素总数
(integer) 2
127.0.0.1:6379>

5.srem key val

127.0.0.1:6379> SCARD list
(integer) 2
127.0.0.1:6379> srem list haha   			# 删除不存在元素，不会抛出异常
(integer) 0
127.0.0.1:6379> srem list hello				# 删除指定元素hello
(integer) 1
127.0.0.1:6379> SMEMBERS list
1) "world"

6.srandmember key [count]

127.0.0.1:6379> SMEMBERS list 
1) "v3"
2) "v4"
3) "v5"
4) "v2"
5) "v1"
6) "v6"
127.0.0.1:6379> SRANDMEMBER list 					# 生成随机数
"v6" 
127.0.0.1:6379> SRANDMEMBER list
"v5"
127.0.0.1:6379> SRANDMEMBER list
"v2"
127.0.0.1:6379> SRANDMEMBER list
"v5"
127.0.0.1:6379> SRANDMEMBER list 3					# 生成指定个数随机数
1) "v5"
2) "v2"
3) "v4"
127.0.0.1:6379> SRANDMEMBER list 3
1) "v2"
2) "v6"
3) "v3"
127.0.0.1:6379> SRANDMEMBER list 3
1) "v5"
2) "v1"
3) "v3"
127.0.0.1:6379> SRANDMEMBER list 3
1) "v1"
2) "v3"
3) "v4"

7.spop key val

127.0.0.1:6379> SMEMBERS list
1) "v5"
2) "v2"
3) "v1"
4) "v6"
5) "v3"
6) "v4"
127.0.0.1:6379> spop list 3  					# 随机删除3个值
1) "v1"
2) "v2"
3) "v4"
127.0.0.1:6379> SMEMBERS list
1) "v5"
2) "v6"
3) "v3"
127.0.0.1:6379> spop list					# 随机删除一个值
"v6"
127.0.0.1:6379> spop list
"v3"
127.0.0.1:6379> spop list
"v5"
127.0.0.1:6379> SMEMBERS list
(empty array)
127.0.0.1:6379> 

8.smove oldKey newKey val

127.0.0.1:6379> SMEMBERS list
1) "v3"
2) "v2"
3) "v1"
4) "v4"
5) "v5"
127.0.0.1:6379> SMOVE list mylist v3 	# 移动list的v3元素到mylist中
(integer) 1
127.0.0.1:6379> SMEMBERS list
1) "v1"
2) "v4"
3) "v5"
4) "v2"
127.0.0.1:6379> SMEMBERS mylist
1) "v3"
127.0.0.1:6379> 

9.sdiff k1 k2 | sinter k1 k2 | sunion k1 k2

127.0.0.1:6379> SMEMBERS k1
1) "v3"
2) "v2"
3) "v1"
127.0.0.1:6379> SMEMBERS k2
1) "v5"
2) "v3"
3) "v4"
127.0.0.1:6379> SDIFF k1 k2					# 	差集，以 k1 为参考 剔除共同的元素
1) "v2"
2) "v1"
127.0.0.1:6379> SINTER k1 k2				# 	并集，共同元素
1) "v3"
127.0.0.1:6379> SUNION k1 k2				#	合集，合并元素
1) "v2"
2) "v3"
3) "v1"
4) "v5"
5) "v4"
127.0.0.1:6379>