KEYS pattern
返回所有給定模式的key(pattern類似于正則)
*: 匹配任意個(gè)字符
?: 匹配單個(gè)任意字符
-
\x: 匹配特殊字符 ? *
127.0.0.1:6379> KEYS * 1) "str1" 2) "str6" 3) "yiibai" 4) "tedis" 5) "str2" 6) "userinfo" 7) "str3" 8) "str4" 9) "redis" 10) "page2" 11) "page" 12) "str5" 127.0.0.1:6379> KEYS str* 1) "str1" 2) "str6" 3) "str2" 4) "str3" 5) "str4" 6) "str5" 127.0.0.1:6379> KEYS str[1-3] 1) "str1" 2) "str2" 3) "str3" 127.0.0.1:6379> KEYS page? 1) "page2"
EXISTS key
檢測(cè)指定key是否存在撕彤,存在返回1唉铜,否則返回0
127.0.0.1:6379> EXISTS userinfo
(integer) 1
TYPE key
返回key存儲(chǔ)的類型贬循,如果不存在則返回none
127.0.0.1:6379> TYPE userinfo
hash
127.0.0.1:6379> TYPE redis
string
127.0.0.1:6379> TYPE notExists
none
EXPIRE key seconds
設(shè)置key的過期時(shí)間抗果,如果key不存在則返回0葵蒂,否則返回1.如果key已經(jīng)存在過期時(shí)間則再設(shè)置會(huì)覆蓋之前的過期時(shí)間
127.0.0.1:6379> EXPIRE tedis 5
(integer) 1
127.0.0.1:6379> TTL tedis
(integer) 2
127.0.0.1:6379> TTL tedis
(integer) -2
127.0.0.1:6379> EXISTS tedis
(integer) 0
127.0.0.1:6379> EXPIRE tedis 5
(integer) 0 // tedis不存在
EXPIREAT key timestamp
設(shè)置在指定timestamp過期
127.0.0.1:6379> EXPIREAT redis 1448018396
(integer) 1
127.0.0.1:6379> TTL redis
(integer) 6960
PEXPIRE key milliseconds
設(shè)定過期時(shí)間為毫秒潜叛,其他與EXPIRE相同
127.0.0.1:6379> PEXPIRE redis 60000
(integer) 1
127.0.0.1:6379> TTL redis
(integer) 58
PEXPIREAT key timestamp
設(shè)定指定timestamp過期虹钮,單位是毫秒翼雀,其他與EXPIREBY相同
127.0.0.1:6379> PEXPIREAT redis 1448018396000
(integer) 1
127.0.0.1:6379> TTL redis
(integer) 6662
TTL key
以秒為單位返回key的剩余時(shí)間奏黑,如果沒有設(shè)置過期時(shí)間炊邦,則返回-1,如果key不存在熟史,則返回-2
127.0.0.1:6379> TTL redis
(integer) 6523
127.0.0.1:6379> TTL stronger
(integer) -2
127.0.0.1:6379> TTL str1
(integer) -1
PTTL key
以毫秒為單位馁害,返回key的剩余時(shí)間,如果沒有設(shè)置過期時(shí)間蹂匹,則返回-1碘菜,如果key不存在,則返回-2
127.0.0.1:6379> PTTL redis
(integer) 6505944
127.0.0.1:6379> PTTL str1
(integer) -1
127.0.0.1:6379> PTTL stronger
(integer) -2
PERSIST key
將帶有過期時(shí)間的key變?yōu)橛谰玫膋ey搓译,成功返回1雕崩,key不存在或者已經(jīng)是永久的key則返回0
127.0.0.1:6379> TTL redis
(integer) 6377
127.0.0.1:6379> PERSIST redis
(integer) 1
127.0.0.1:6379> TTL redis
(integer) -1
DEL key [key]##
刪除指定的key 一個(gè)或多個(gè)胡桨,返回值是刪除的key的個(gè)數(shù)
127.0.0.1:6379> DEL str5
(integer) 1
127.0.0.1:6379> DEL str5
(integer) 0
127.0.0.1:6379> DEL str3 str4
(integer) 2
RANDOMKEY
隨機(jī)的從當(dāng)前數(shù)據(jù)庫(kù)中返回一個(gè)KEY
RENAME key newkey##
重命名key為newkey,如果newkey是已經(jīng)存在的key則覆蓋它计雌,如果key和newkey相同則報(bào)錯(cuò),如果rename一個(gè)不存在的key會(huì)保存
127.0.0.1:6379> KEYS *
1) "str1"
2) "str6"
3) "yiibai"
4) "str2"
5) "userinfo"
6) "redis"
7) "page2"
8) "page"
127.0.0.1:6379> RENAME str6 str3
OK
127.0.0.1:6379> RENAME str3 str2
OK
127.0.0.1:6379> KEYS *
1) "str1"
2) "str2"
3) "yiibai"
4) "userinfo"
5) "redis"
6) "page2"
7) "page"
127.0.0.1:6379> GET str2
"text6"
127.0.0.1:6379> GET str1
"text1"
127.0.0.1:6379> RENAME str2 str2
(error) ERR source and destination objects are the same
RENAMENX key newkey
必須重命名這個(gè)新名稱不存在才能成功静尼,失敗返回0
127.0.0.1:6379> EXISTS str1
(integer) 1
127.0.0.1:6379> RENAMENX str2 str1
(integer) 0
DUMP key
序列化個(gè)定的key白粉,返回序列化之后的值
127.0.0.1:6379> DUMP redis
"\x00\x0bhello world\x06\x00\x9d\x11!9S\x92\x9c\xa7"
RESTORE key ttl value
反序列化字符串到key上,這個(gè)key不能是已存在的鼠渺,否則出粗鸭巴。ttl設(shè)定有效時(shí)間的毫秒數(shù),設(shè)置0表示永久
127.0.0.1:6379> RESTORE str5 0 "\x00\x0bhello world\x06\x00\x9d\x11!9S\x92\x9c\xa7"
OK
127.0.0.1:6379> RESTORE str2 0 "\x00\x0bhello world\x06\x00\x9d\x11!9S\x92\x9c\xa7"
(error) BUSYKEY Target key name already exists.
MOVE key DbId
移動(dòng)key從一個(gè)數(shù)據(jù)庫(kù)到另外一個(gè)數(shù)據(jù)庫(kù)中拦盹,如果移動(dòng)的key不存在則操作失斁樽妗;如果目的數(shù)據(jù)庫(kù)已經(jīng)存在key則操作失敗返回0普舆,成功返回1
127.0.0.1:6379> MOVE str5 2
(integer) 1 // 成功
127.0.0.1:6379> SELECT 2
OK
127.0.0.1:6379[2]> KEYs *
1) "str5"
127.0.0.1:6379[2]> SELECT 0
OK
127.0.0.1:6379> KEYS str*
1) "str1"
2) "str2"
127.0.0.1:6379> set str5 "from 0"
OK
127.0.0.1:6379> KEYS str*
1) "str1"
2) "str2"
3) "str5"
127.0.0.1:6379> MOVE str5 2
(integer) 0 // 失敗恬口,2中已存在key
OBJECT MIGRATE SCAN SORT 后續(xù)講解