简介

  • Redis Set（集合）
  • 命令特征：所有命令开始前都带有字母“S”
  • 使用场合：好友共同关注

    增加

    | 命令 | 解释 | | —- | —- | | SADD key member [member …] | 添加一个或者多个元素到集合(set)里 | | SUNION key [key …] | 添加多个set元素 |

删除

命令 解释
SPOP key [count] 删除并获取一个集合里面的元素
SREM key member [member …] 从集合里删除一个或多个元素

查询

命令 解释
SCARD key 获取集合里面的元素数量
SDIFF key [key …] 获得队列不存在的元素
SDIFFSTORE destination key [key …] 获得队列不存在的元素，并存储在一个关键的结果集
SINTER key [key …] 获得两个集合的交集
SINTERSTORE destination key [key …] 获得两个集合的交集，并存储在一个关键的结果集
SISMEMBER key member 确定一个给定的值是一个集合的成员
SMEMBERS key 获取集合里面的所有元素
SRANDMEMBER key [count] 从集合里面随机获取一个元素

修改

命令 解释
SMOVE source destination member 移动集合里面的一个元素到另一个集合
SUNIONSTORE destination key [key …] 合并set元素，并将结果存入新的set里面
SSCAN key cursor [MATCH pattern] [COUNT count] 迭代set里面的元素

其他

http://www.redis.cn/commands.html#set

  1. help @set
  3.   SADD key member [member ...]
  4.   summary: Add one or more members to a set
  5.   since: 1.0.0
  7.   SCARD key
  8.   summary: Get the number of members in a set
  9.   since: 1.0.0
  11.   SDIFF key [key ...]
  12.   summary: Subtract multiple sets
  13.   since: 1.0.0
  15.   SDIFFSTORE destination key [key ...]
  16.   summary: Subtract multiple sets and store the resulting set in a key
  17.   since: 1.0.0
  19.   SINTER key [key ...]
  20.   summary: Intersect multiple sets
  21.   since: 1.0.0
  23.   SINTERSTORE destination key [key ...]
  24.   summary: Intersect multiple sets and store the resulting set in a key
  25.   since: 1.0.0
  27.   SISMEMBER key member
  28.   summary: Determine if a given value is a member of a set
  29.   since: 1.0.0
  31.   SMEMBERS key
  32.   summary: Get all the members in a set
  33.   since: 1.0.0
  35.   SMOVE source destination member
  36.   summary: Move a member from one set to another
  37.   since: 1.0.0
  39.   SPOP key [count]
  40.   summary: Remove and return one or multiple random members from a set
  41.   since: 1.0.0
  43.   SRANDMEMBER key [count]
  44.   summary: Get one or multiple random members from a set
  45.   since: 1.0.0
  47.   SREM key member [member ...]
  48.   summary: Remove one or more members from a set
  49.   since: 1.0.0
  51.   SSCAN key cursor [MATCH pattern] [COUNT count]
  52.   summary: Incrementally iterate Set elements
  53.   since: 2.8.0
  55.   SUNION key [key ...]
  56.   summary: Add multiple sets
  57.   since: 1.0.0
  59.   SUNIONSTORE destination key [key ...]
  60.   summary: Add multiple sets and store the resulting set in a key
  61.   since: 1.0.0