Redis五种数据类型

127.0.0.1String:key-value(做缓存)

Redis中所有的数据都是字符串。命令不区分大小写,key是区分大小写的。Redis是单线程的。Redis中不适合保存内容大的数据。

get、set、

incr:加一(生成id)

Decr:减一

 

Hash:key-fields-values(做缓存)

相当于一个key对于一个map,map中还有key-value

使用hash对key进行归类。

Hset:向hash中添加内容

Hget:从hash中取内容

 

List:有顺序可重复

127.0.0.1:6379> lpush list1 a b c d

(integer) 4

127.0.0.1:6379> lrange list1 0 -1

1) "d"

2) "c"

3) "b"

4) "a"

127.0.0.1:6379> rpush list1 1 2 3 4

(integer) 8

127.0.0.1:6379> lrange list1 0 -1

1) "d"

2) "c"

3) "b"

4) "a"

5) "1"

6) "2"

7) "3"

8) "4"

127.0.0.1:6379>

127.0.0.1:6379> lpop list1

"d"

127.0.0.1:6379> lrange list1 0 -1

1) "c"

2) "b"

3) "a"

4) "1"

5) "2"

6) "3"

7) "4"

127.0.0.1:6379> rpop list1

"4"

127.0.0.1:6379> lrange list1 0 -1

1) "c"

2) "b"

3) "a"

4) "1"

5) "2"

6) "3"

127.0.0.1:6379>

 

Set:元素无顺序,不能重复

127.0.0.1:6379> sadd set1 a b c c c d

(integer) 4

127.0.0.1:6379> smembers set1

1) "b"

2) "c"

3) "d"

4) "a"

127.0.0.1:6379> srem set1 a

(integer) 1

127.0.0.1:6379> smembers set1

1) "b"

2) "c"

3) "d"

127.0.0.1:6379>

还有集合运算命令。

 

SortedSet(zset):有顺序,不能重复

127.0.0.1:6379> zadd zset1 2 a 5 b 1 c 6 d

(integer) 4

127.0.0.1:6379> zrange zset1 0 -1

1) "c"

2) "a"

3) "b"

4) "d"

127.0.0.1:6379> zrem zset1 a

(integer) 1

127.0.0.1:6379> zrange zset1 0 -1

1) "c"

2) "b"

3) "d"

127.0.0.1:6379> zrevrange zset1 0 -1

1) "d"

2) "b"

3) "c"

127.0.0.1:6379> zrange zset1 0 -1 withscores

1) "c"

2) "1"

3) "b"

4) "5"

5) "d"

6) "6"

127.0.0.1:6379> zrevrange zset1 0 -1 withscores

1) "d"

2) "6"

3) "b"

4) "5"

5) "c

6) "1"

posted @ 2019-11-03 22:16  helen305250903  阅读(183)  评论(0编辑  收藏  举报