查看“︁Redis:命令”︁的源代码

= 基本操作 =
==增删改查==
===设置key的value===
<syntaxhighlight lang="bash">
> set mykey somevalue
OK
> get mykey
"somevalue"
</syntaxhighlight>

设置的时候支持附加条件，仅在value不存在（或者存在）的时候才设置值
<syntaxhighlight lang="bash">
> set mykey newval nx
(nil)
> set mykey newval xx
OK
</syntaxhighlight>

===数字操作===
可通过 <span class="article-label">INCR</span>, <span class="article-label">INCRBY</span>, <span class="article-label">DECR</span> and <span class="article-label">DECRBY</span>等操作数字：
<syntaxhighlight lang="bash">
> set counter 100
OK
> incr counter
(integer) 101
> incr counter
(integer) 102
> incrby counter 50
(integer) 152
</syntaxhighlight>

===批量设置===
<syntaxhighlight lang="bash">
> mset a 10 b 20 c 30
OK
> mget a b c
1) "10"
2) "20"
3) "30"
</syntaxhighlight>

===查询key的类型及存在与否===
<syntaxhighlight lang="bash">
> set mykey hello
OK
> exists mykey
(integer) 1
> del mykey
(integer) 1
> exists mykey
(integer) 0

> set mykey x
OK
> type mykey
string
> del mykey
(integer) 1
> type mykey
none
</syntaxhighlight>
==TTL操作==
===设置key的ttl===
<syntaxhighlight lang="bash">
> set key some-value
OK
> expire key 5
(integer) 1
> get key (immediately)
"some-value"
> get key (after some time)
(nil)
</syntaxhighlight>

可以一次性设置key和ttl：
<syntaxhighlight lang="bash">
> set key 100 ex 10
OK
> ttl key
(integer) 9
</syntaxhighlight>

==List操作==
===list插入及查询===
<syntaxhighlight lang="bash">
> rpush mylist A
(integer) 1
> rpush mylist B
(integer) 2
> lpush mylist first
(integer) 3
> lrange mylist 0 -1
1) "first"
2) "A"
3) "B"

> rpush mylist 1 2 3 4 5 "foo bar"
(integer) 9
</syntaxhighlight>
===从list中取出数据===
<syntaxhighlight lang="bash">
> rpush mylist a b c
(integer) 3
> rpop mylist
"c"
> rpop mylist
"b"
> rpop mylist
"a"
> rpop mylist
(nil)
</syntaxhighlight>
===裁剪list===
<syntaxhighlight lang="bash">
> rpush mylist 1 2 3 4 5
(integer) 5
> ltrim mylist 0 2
OK
> lrange mylist 0 -1
1) "1"
2) "2"
3) "3"
</syntaxhighlight>
===阻塞操作===
"wait for elements in the list tasks, but return if after 5 seconds no element is available"

<syntaxhighlight lang="bash">
> brpop tasks 5
1) "tasks"
2) "do_something"
</syntaxhighlight>

Notes:
* It is possible to build safer queues or rotating queues using <span class="article-label">LMOVE</span>.
* There is also a blocking variant of the command, called <span class="article-label">BLMOVE</span>.

==Hash操作==
===设置及查询===
<syntaxhighlight lang="bash">
> hmset user:1000 username antirez birthyear 1977 verified 1
OK
> hget user:1000 username
"antirez"
> hget user:1000 birthyear
"1977"
> hgetall user:1000
1) "username"
2) "antirez"
3) "birthyear"
4) "1977"
5) "verified"
6) "1"
</syntaxhighlight>

<syntaxhighlight lang="bash">
> hmget user:1000 username birthyear no-such-field
1) "antirez"
2) "1977"
3) (nil)
</syntaxhighlight>

<syntaxhighlight lang="bash">
> hincrby user:1000 birthyear 10
(integer) 1987
> hincrby user:1000 birthyear 10
(integer) 1997
</syntaxhighlight>
[[Category:Database]]