redis 的set数据类型

Posted 2020-09-27 逆水行舟，不进则退

相关命令

1.SADD

　　SADD key-name item1 [item 2…]

将一个或多个成员元素加入到集合中

 

2.SREM

　　SMEMBERS  key-name item1 [item 2…]

移除集合中的一个或多个成员元素，不存在的成员元素会被忽略

 

3.SMEMBERS

　　SMEMBERS key-name

返回集合中的所有的成员。 不存在的集合 key 被视为空集合

 

4.SCARD

　　SCARD key-name

返回集合中元素的数量

 php示例

$redis = new redis();  
$redis->connect(\'127.0.0.1\', 6609);  
$redis->delete(\'set1\');  
$redis->delete(\'set2\');
$redis -> sAdd(\'set1\',\'a\',\'b\',\'c\',\'d\',\'e\');
var_dump($redis -> sMembers(\'set1\')); 
echo "<br/>";
//rem
//结果 array(5) { [0]=> string(1) "d" [1]=> string(1) "a" [2]=> string(1) "c" [3]=> string(1) "b" [4]=> string(1) "e" }
var_dump($redis -> sRem(\'set1\',\'d\',\'e\'));  
echo "<br/>";  
//结果  int(2) 
var_dump($redis -> sMembers(\'set1\')); 
echo "<br/>";
//结果 array(3) { [0]=> string(1) "b" [1]=> string(1) "c" [2]=> string(1) "a" } 
var_dump($redis -> sCard(\'set1\')); 
echo "<br/>";  
//结果  int(3) 

 

5.SMOVE

　　SMOVE source-key dest-key item

　　将 item元素从 source-key集合移动到 dest-key 集合

　　成功移除返回1，否则返回0

  php示例

var_dump($redis -> sMove(\'set1\',\'set2\',\'c\')); 
echo "<br/>";  
//结果  bool(true) 
var_dump($redis -> sMembers(\'set1\')); 
echo "<br/>";  
//结果  array(2) { [0]=> string(1) "b" [1]=> string(1) "a" } 
var_dump($redis -> sMembers(\'set2\'));
echo "<br/>";  
//结果   array(1) { [0]=> string(1) "c" } 

 

6.SPOP

     SPOP key-name

　　随机移除集合中的一个元素

  php示例

//spop
var_dump($redis -> sPop(\'set1\'));     
echo "<br/>";  
//结果  string(1) "a" 
var_dump($redis -> sMembers(\'set1\'));
echo "<br/>";  
//结果   array(1) { [0]=> string(1) "b" } 

 

7.SISMEMBER

　　SMEMBERS  key-name item

检测元素item是否存在与几何key-name中

 

 php示例

var_dump($redis -> sMembers(\'set1\'));  
//结果  array(2) { [0]=> string(1) "b" [1]=> string(1) "a" } 
var_dump($redis -> sIsMember(\'set1\',\'a\')); 
echo "<br/>";  
//结果  bool(true)  

 

8.SRANDMEMBER

 SRANDMEMBER  key-name [count]

从集合里面随机返回一个或多个元素

 php示例

//srandmember
$redis->delete(\'set1\');
$redis -> sAdd(\'set1\',\'a\',\'b\',\'c\',\'d\',\'e\');
var_dump($redis -> sRandMember(\'set1\'));
echo "<br/>";  
//结果   string(1) "b"  
var_dump($redis -> sMembers(\'set1\')); 
echo "<br/>";  
//结果  array(5) { [0]=> string(1) "c" [1]=> string(1) "b" [2]=> string(1) "e" [3]=> string(1) "a" [4]=> string(1) "d" } 
var_dump($redis -> sRandMember(\'set1\',3));
echo "<br/>";  
//结果   array(3) { [0]=> string(1) "c" [1]=> string(1) "b" [2]=> string(1) "d" }  
var_dump($redis -> sMembers(\'set1\')); 
echo "<br/>";  
//结果array(5) { [0]=> string(1) "c" [1]=> string(1) "b" [2]=> string(1) "e" [3]=> string(1) "a" [4]=> string(1) "d" }

 

 9.SINTER

SINTER key-name [key-name1……]

返回给定所有给定集合的交集。 不存在的集合 key 被视为空集。 当给定集合当中有一个空集时，结果也为空集

 

10.SINTERSTORE

SINTERSTORE key-name [key-name1……]

将给定集合之间的交集存储在指定的集合中。如果指定的集合已经存在，则将其覆盖

  php示例

$redis->delete(\'set1\');  
$redis->delete(\'set2\');
$redis -> sAdd(\'set1\',\'a\',\'b\',\'c\',\'d\',\'e\');
$redis -> sAdd(\'set2\',\'a\',\'b\',\'x\',\'y\',\'z\');
var_dump($redis -> sMembers(\'set1\')); 
echo "<br/>";  
//结果array(5) { [0]=> string(1) "d" [1]=> string(1) "a" [2]=> string(1) "c" [3]=> string(1) "b" [4]=> string(1) "e" } 
var_dump($redis -> sMembers(\'set2\')); 
echo "<br/>";  
//结果array(5) { [0]=> string(1) "y" [1]=> string(1) "x" [2]=> string(1) "a" [3]=> string(1) "b" [4]=> string(1) "z" } 
var_dump($redis -> sInter(\'set1\',\'set2\')); 
echo "<br/>";  
//结果array(2) { [0]=> string(1) "a" [1]=> string(1) "b" } 
var_dump($redis -> sInterStore(\'set-inter\',\'set1\',\'set2\'));
echo "<br/>"; 
//int(2)  
var_dump($redis -> sMembers(\'set-inter\'));
echo "<br/>"; 
//结果array(2) { [0]=> string(1) "a" [1]=> string(1) "b" } 

 

 11.SUNION

SUNION key-name [key-name1……]

返回给定集合的并集。不存在的集合 key 被视为空集

 

 12.SUNIONSTORE

SUNIONSTORE  dest-key key-name [key-name1……]

将给定集合的并集存储在指定的集合 dest-key中

  php示例

$redis->delete(\'set1\');  
$redis->delete(\'set2\');
$redis -> sAdd(\'set1\',\'a\',\'b\',\'c\',\'d\',\'e\');
$redis -> sAdd(\'set2\',\'a\',\'b\',\'x\',\'y\',\'z\');
var_dump($redis -> sMembers(\'set1\')); 
echo "<br/>";  
//结果array(5) { [0]=> string(1) "d" [1]=> string(1) "a" [2]=> string(1) "c" [3]=> string(1) "b" [4]=> string(1) "e" } 
var_dump($redis -> sMembers(\'set2\')); 
echo "<br/>";  
//结果array(5) { [0]=> string(1) "y" [1]=> string(1) "x" [2]=> string(1) "a" [3]=> string(1) "b" [4]=> string(1) "z" } 
var_dump($redis -> sUnion(\'set1\',\'set2\')); 
echo "<br/>";  
//结果array(8) { [0]=> string(1) "y" [1]=> string(1) "z" [2]=> string(1) "c" [3]=> string(1) "b" [4]=> string(1) "e" [5]=> string(1) "x" [6]=> string(1) "d" [7]=> string(1) "a" }  
var_dump($redis -> sUnionStore(\'set-union\',\'set1\',\'set2\')); 
echo "<br/>"; 
//int(8) 
var_dump($redis -> sMembers(\'set-union\')); 
echo "<br/>"; 
//结果array(8) { [0]=> string(1) "y" [1]=> string(1) "z" [2]=> string(1) "c" [3]=> string(1) "b" [4]=> string(1) "e" [5]=> string(1) "x" [6]=> string(1) "d" [7]=> string(1) "a" } 

 

 13.SDIFF

SDIFF key-name [key-name1……]

返回给定集合之间的差集

 

14.SDIFFSTORE

SDIFF dest-key key-name [key-name1……]

将给定集合之间的差集存储在指定的集合dest-key中

 

 php示例

$redis->delete(\'set1\');  
$redis->delete(\'set2\');
$redis -> sAdd(\'set1\',\'a\',\'b\',\'c\',\'d\',\'e\');
$redis -> sAdd(\'set2\',\'a\',\'b\',\'x\',\'y\',\'z\');
var_dump($redis -> sMembers(\'set1\')); 
echo "<br/>";  
//结果array(5) { [0]=> string(1) "d" [1]=> string(1) "a" [2]=> string(1) "c" [3]=> string(1) "b" [4]=> string(1) "e" } 
var_dump($redis -> sMembers(\'set2\')); 
echo "<br/>";  
//结果array(5) { [0]=> string(1) "y" [1]=> string(1) "x" [2]=> string(1) "a" [3]=> string(1) "b" [4]=> string(1) "z" } 
var_dump($redis -> sDiff(\'set1\',\'set2\')); 
echo "<br/>";  
//结果array(3) { [0]=> string(1) "d" [1]=> string(1) "c" [2]=> string(1) "e" }   
var_dump($redis -> sDiffStore(\'set-diff\',\'set1\',\'set2\')); 
echo "<br/>"; 
//int(3) 
var_dump($redis -> sMembers(\'set-diff\')); 
echo "<br/>"; 
//结果array(3) { [0]=> string(1) "d" [1]=> string(1) "c" [2]=> string(1) "e" } 

 

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