Redis 的數據類型 - Keys 相關的命令
KEYS：返回所有符合給定模式的 key
語法：KEYS pattern
*：匹配任意個字符
?:匹配一個任意字符
[]:匹配[]之間的一個字符，[b-e],a[b-e] ab ac ad ae
\x:匹配特殊字符\? \*
MSET one ‘one‘ two ‘two‘ three ‘three‘ four ‘four‘ five ‘five‘ six ‘six‘ seven ‘seven‘
KEYS *
KEYS *o*
KEYS t???
KEYS ?s*
KEYS c[n-z]* #c開頭，後面接 n-z 中任意一個字符#
127.0.0.1:6379> MSET one ‘one‘ two ‘two‘ three ‘three‘ four ‘four‘ five ‘five‘ six ‘six‘ seven ‘seven‘ OK 127.0.0.1:6379> KEYS * 1) "test1" 2) "myKey" 3) "count" 4) "test3" 5) "three" 6) "userInfo3" 7) "count3" 8) "test14" 9) "test2" 10) "testHash1" 11) "test4" 12) "one" 13) "two" 14) "testStr1"15) "count1" 16) "testStr3" 17) "test15" 18) "five" 19) "test9" 20) "testStr5" 21) "test" 22) "test10" 23) "testStr2" 24) "test13" 25) "testStr4" 26) "four" 27) "userInfo2" 28) "seven" 29) "count2" 30) "six" 31) "test6" 32) "test5" 33) "test8" 127.0.0.1:6379> KEYS *o* 1) "count" 2) "userInfo3" 3) "count3"4) "one" 5) "two" 6) "count1" 7) "four" 8) "userInfo2" 9) "count2" 127.0.0.1:6379> KEYS t??? 1) "test" 127.0.0.1:6379> KEYS ?s* 1) "userInfo3" 2) "userInfo2" 127.0.0.1:6379> KEYS c[n-z]* 1) "count" 2) "count3" 3) "count1" 4) "count2"
EXISTS：檢測指定key是否存在
語法：EXISTS key
EXISTS one
127.0.0.1:6379> EXISTS one (integer) 1
TYPE：返回key所存儲的類型
語法：TYPE key
TYPE test1
TYPE userInfo2 #不存在的key 返回 none，存在返回 key的 類型 (string, hash, set, zset, list) #
127.0.0.1:6379> TYPE test1 string 127.0.0.1:6379> TYPE userInfo2 hash 127.0.0.1:6379> TYPE userInfo22 none
EXPIRE：設置 key 的過期時間
語法：EXPIRE key seconds
SET cache_page ‘http://www.cnblogs.com/shuo-128/‘
EXPIRE cache_page 100
TTL cache_page #如果 key 已經存在過期時間，在通過 EXPIRE 設置的時候會覆蓋之前過期時間#
127.0.0.1:6379> SET cache_page ‘http://www.cnblogs.com/shuo-128/‘ OK 127.0.0.1:6379> EXPIRE cache_page 100 (integer) 1 127.0.0.1:6379> TTL cache_page (integer) 94 127.0.0.1:6379> TTL cache_page (integer) 92 127.0.0.1:6379> TTL cache_page (integer) 85
EXPIREAT：需要指定在指定時間戳過期
語法：EXPIREAT key timestamp #這裏設置過期時間要是時間戳，現在時間為 1498364329 的話 設置 10000 毫秒後過期要在時間戳上加 10000#
SET cache_page1 ‘http://www.redis.com‘
EXPIREAT cache_page1 1498374329
127.0.0.1:6379> SET cache_page1 ‘http://www.redis.com‘ OK 127.0.0.1:6379> EXPIREAT cache_page1 1498374329 (integer) 1
PEXPIRE：以毫秒的形式指定過期時間
語法：PEXIRE key milliseconds
SET cache_page2 ‘http://www.redis.com‘
PEXPIRE cache_page2 80000
PTTL cache_page2
127.0.0.1:6379> SET cache_page2 ‘http://www.redis.com‘ OK 127.0.0.1:6379> PEXPIRE cache_page2 80000 (integer) 1 127.0.0.1:6379> TTL cache_page2 (integer) 66 127.0.0.1:6379> 127.0.0.1:6379> TTL cache_page2 (integer) 50 127.0.0.1:6379> TTL cache_page2 (integer) 41 127.0.0.1:6379> PTTL cache_page2 (integer) 24031
PEXPIREAT：指定時間戳，單位為毫秒
語法：PEXPIREAT key timestamp
SET cache_page3 ‘http://www.cnblogs.com/shuo-128/‘
PEXPIREAT cache_page3 149837432910000000
PTTL cache_page3
127.0.0.1:6379> PEXPIREAT cache_page3 149837432910000000 (integer) 1 127.0.0.1:6379> PTTL cache_page3 (integer) 149835934535432563 127.0.0.1:6379> PTTL cache_page3 (integer) 149835934535427739
TTL：以秒為單位返回 key 剩余時間
語法：TTL key
SET cache_page4 ‘http://www.baidu.com‘
TTL cache_page4
TTL cache_page5
EXPIRE cache_page4 100
TTL cache_page4 #如果沒有 key 沒有設置過期時間，返回 -1，如果 key 不存在返回 -2 #
127.0.0.1:6379> SET cache_page4 ‘http://www.baidu.com‘ OK 127.0.0.1:6379> TTL cache_page4 (integer) -1 127.0.0.1:6379> TTL cache_page5 (integer) -2 127.0.0.1:6379> EXPIRE cache_page4 100 (integer) 1 127.0.0.1:6379> TTL cache_page4 (integer) 95
PTTL：以毫秒為單位返回 key 的剩余時間
語法：PTTL key
PTTL cache_page3
127.0.0.1:6379> PTTL cache_page3 (integer) 149835934535432563
PERSIST：將一個帶有過期時間的 key 轉變成永久的 key
語法：PERSIST key
PTTL cache_page3
PERSIST cache_page3
PTTL cache_page3
127.0.0.1:6379> PTTL cache_page3 (integer) 149835934535432563 127.0.0.1:6379> PERSIST cache_page3 (integer) 1 127.0.0.1:6379>PTTL cache_page3 (integer) -1
DEL：刪除指定的 key
語法：DEL key ...
DEL one two three four
127.0.0.1:6379> DEL one two three four (integer) 4
RANDOMKEY：隨機的從當前數據庫中返回一個 key
語法：RANDOMKEY
RANDOMKEY
127.0.0.1:6379> RANDOMKEY "testStr3" 127.0.0.1:6379> RANDOMKEY "testStr1"
RENAME：重名名一個鍵
語法：RENAME key newkey
SET testRename1 ‘rename1‘
RENAME testRename1 testRename2
GET testRename1
RENAME testRename2 testRename2
GET testRename2
RENAME testRename2 test14 #如果名稱沒有發生改變會報錯#
127.0.0.1:6379> SET testRename1 ‘rename1‘ OK 127.0.0.1:6379> RENAME testRename1 testRename2 OK 127.0.0.1:6379> RENAME testRename2 testRename2 OK 127.0.0.1:6379> GET testRename1 (nil) 127.0.0.1:6379> GET testRename2 "rename1"
RENAMENX：必須重命名這個新名稱不存在才會生效
語法：RENAMENX key newkey
RENAMENX testRename3 tree
RENAMENX testRename2 two
127.0.0.1:6379> RENAMENX testRename3 tree (error) ERR no such key 127.0.0.1:6379> RENAMENX testRename2 two (integer) 1
DUMP：序列化給定的 Key，返回序列化之後的值
語法：DUMP key
SET testDump ‘this is a Dump‘
DUMP testDump
127.0.0.1:6379> SET testDump ‘this is a Dump‘ OK 127.0.0.1:6379> DUMP testDump "\x00\x0ethis is a Dump\a\x00\x01\x80\xf5:\x0eI\xdb,"
RESTORE：反序列化
語法：RESTORE key cache value 過期時間cache 為毫秒，不設置過期時間則為 0
RESTORE testDump1 0 "\x00\x0ethis is a Dump\a\x00\x01\x80\xf5:\x0eI\xdb,"
127.0.0.1:6379> RESTORE testDump1 0 "\x00\x0ethis is a Dump\a\x00\x01\x80\xf5:\x0eI\xdb," OK 127.0.0.1:6379> GET testDump1 "this is a Dump"
MOVE：將當前數據庫中的 key 移動到另外的數據庫中
語法：MOVE key dbId
SELECT 0
SET testMove ‘Move‘
MOVE testMove 1
SELECT 1
MOVE testMove1 1 #當移動一個不存在的 key 會失敗，當目錄數據庫中存在同名 key 的時候移動失敗#
127.0.0.1:6379> SELECT 0 OK 127.0.0.1:6379> SET testMove ‘Move‘ OK 127.0.0.1:6379> MOVE testMove 1 (integer) 1 127.0.0.1:6379> SELECT 1 OK 127.0.0.1:6379[1]> KEYS * 1) "testMove" 127.0.0.1:6379[1]> GET testMove "Move" 127.0.0.1:6379[1]> SELECT 0 OK 127.0.0.1:6379> SET testMove ‘Move‘ OK 127.0.0.1:6379> MOVE testMove 1 (integer) 0 127.0.0.1:6379> MOVE testMove1 1 (integer) 0
Redis 的數據類型 - Keys 相關的命令