Redis 命令 - Keys
DEL key [key ...]
Delete a key
127.0.0.1:6379> SET foo hello
OK
127.0.0.1:6379> DEL foo hello
(integer) 1
127.0.0.1:6379> EXISTS foo
(integer) 0
DUMP key
Return a serialized version of the value stored at the specified key.
127.0.0.1:6379> SET foo hello
OK
127.0.0.1:6379> DUMP foo
"\x00\x05hello\x06\x00\xf5\x9f\xb7\xf6\x90a\x1c\x99"
EXISTS key
Determine if a key exists
127.0.0.1:6379> EXISTS foo
(integer) 0
127.0.0.1:6379> SET foo hello
OK
127.0.0.1:6379> EXISTS foo
(integer) 1
EXPIRE key seconds
Set a key's time to live in seconds
127.0.0.1:6379> SET foo hello
OK
127.0.0.1:6379> EXPIRE foo 10
(integer) 1
127.0.0.1:6379> TTL foo
(integer) 5
127.0.0.1:6379> GET foo
"hello"
127.0.0.1:6379> TTL foo
(integer) -2
127.0.0.1:6379> GET foo
(nil)
EXPIREAT key timestamp
Set the expiration for a key as a UNIX timestamp
127.0.0.1:6379> SET foo hello
OK
127.0.0.1:6379> TIME
1) "1427471335"
2) "585724"
127.0.0.1:6379> EXPIREAT foo 1427471400
(integer) 1
127.0.0.1:6379> TIME
1) "1427471420"
2) "109363"
127.0.0.1:6379> GET foo
(nil)
KEYS pattern
Find all keys matching the given pattern
127.0.0.1:6379> SET foo 1
OK
127.0.0.1:6379> SET bar 2
OK
127.0.0.1:6379> SET far 3
OK
127.0.0.1:6379> SET bat 4
OK
127.0.0.1:6379> KEYS ba?
1) "bat"
2) "bar"
127.0.0.1:6379> KEYS f*
1) "far"
2) "foo"
MIGRATE host port key destination-db timeout [COPY] [REPLACE]
Available since 2.6.0.
Atomically transfer a key from a Redis instance to another one.
More: http://redis.io/commands/migrate, http://www.redis.cn/commands/migrate.html
MOVE key db
Move a key to another database
127.0.0.1:6379> SET foo hello
OK
127.0.0.1:6379> MOVE foo 1
(integer) 1
127.0.0.1:6379> GET foo
(nil)
127.0.0.1:6379> select 1
OK
127.0.0.1:6379[1]> GET foo
"hello"
OBJECT subcommand [arguments [arguments ...]]
Inspect the internals of Redis objects
More: http://redis.io/commands/object
PERSIST key
Remove the expiration from a key
127.0.0.1:6379> SET foo hello
OK
127.0.0.1:6379> EXPIRE foo 10
(integer) 1
127.0.0.1:6379> TTL foo
(integer) 7
127.0.0.1:6379> PERSIST foo
(integer) 1
127.0.0.1:6379> TTL foo
(integer) -1
PEXPIRE key milliseconds
Set a key's time to live in milliseconds
127.0.0.1:6379> SET foo hello
OK
127.0.0.1:6379> PEXPIRE foo 10000
(integer) 1
127.0.0.1:6379> PTTL foo
(integer) 5937
127.0.0.1:6379> GET foo
"hello"
127.0.0.1:6379> PTTL foo
(integer) -2
127.0.0.1:6379> GET foo
(nil)
PEXPIREAT key milliseconds-timestamp
Set the expiration for a key as a UNIX timestamp specified in milliseconds
127.0.0.1:6379> SET foo hello
OK
127.0.0.1:6379> TIME
1) "1427475623"
2) "105070"
127.0.0.1:6379> PEXPIREAT foo 1427475723105
(integer) 1
127.0.0.1:6379> GET foo
"hello"
127.0.0.1:6379> TIME
1) "1427475724"
2) "402347"
127.0.0.1:6379> GET foo
(nil)
PTTL key
Get the time to live for a key in milliseconds
127.0.0.1:6379> SET foo hello
OK
127.0.0.1:6379> PTTL foo
(integer) -1
127.0.0.1:6379> PEXPIRE foo 10000
(integer) 1
127.0.0.1:6379> PTTL foo
(integer) 8658
127.0.0.1:6379> GET foo
"hello"
127.0.0.1:6379> PTTL foo
(integer) -2
127.0.0.1:6379> GET foo
(nil)
RANDOMKEY
Return a random key from the keyspace
127.0.0.1:6379> MSET foo1 1 foo2 2 foo3 3 foo4 4 foo5 5
OK
127.0.0.1:6379> KEYS *
1) "foo1"
2) "foo4"
3) "foo2"
4) "foo5"
5) "foo3"
127.0.0.1:6379> RANDOMKEY
"foo2"
127.0.0.1:6379> RANDOMKEY
"foo1"
127.0.0.1:6379> RANDOMKEY
"foo5"
RENAME key newkey
Rename a key
127.0.0.1:6379> SET foo hello
OK
127.0.0.1:6379> RENAME foo bar
OK
127.0.0.1:6379> GET bar
"hello"
RENAMENX key newkey
Rename a key, only if the new key does not exist
127.0.0.1:6379> SET foo hello
OK
127.0.0.1:6379> SET bar 0
OK
127.0.0.1:6379> RENAMENX foo bar
(integer) 0
127.0.0.1:6379> GET bar
"0"
127.0.0.1:6379> RENAME foo boo
OK
127.0.0.1:6379> GET boo
"hello"
RESTORE key ttl serialized-value [REPLACE]
Create a key using the provided serialized value, previously obtained using DUMP.
127.0.0.1:6379> SET foo hello
OK
127.0.0.1:6379> DUMP foo
"\x00\x05hello\x06\x00\xf5\x9f\xb7\xf6\x90a\x1c\x99"
127.0.0.1:6379> DEL foo
(integer) 1
127.0.0.1:6379> RESTORE foo 0 "\x00\x05hello\x06\x00\xf5\x9f\xb7\xf6\x90a\x1c\x99"
OK
127.0.0.1:6379> GET foo
"hello"
More: http://redis.io/commands/restore
SORT key [BY pattern] [LIMIT offset count] [GET pattern [GET pattern ...]] [ASC|DESC] [ALPHA] [STORE destination]
Sort the elements in a list, set or sorted set
Detail: http://www.cnblogs.com/huey/p/5655023.html
More: http://redis.io/commands/sort
TTL key
Get the time to live for a key
127.0.0.1:6379> SET foo hello
OK
127.0.0.1:6379> TTL foo
(integer) -1
127.0.0.1:6379> EXPIRE foo 10
(integer) 1
127.0.0.1:6379> TTL foo
(integer) 7
127.0.0.1:6379> GET foo
"hello"
127.0.0.1:6379> TTL foo
(integer) -2
127.0.0.1:6379> GET foo
(nil)
TYPE key
Determine the type stored at key
127.0.0.1:6379> SET foo hello
OK
127.0.0.1:6379> TYPE foo
string
127.0.0.1:6379> LPUSH bar 1
(integer) 1
127.0.0.1:6379> TYPE bar
list
SCAN cursor [MATCH pattern] [COUNT count]
Incrementally iterate the keys space
More: http://redis.io/commands/scan, http://www.redis.cn/commands/scan.html
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