Redis.md 4.4 KB
title: Redis
Redis datastructures
string , list , hash , set and sorted set
String
Set value
set <key name> <value>
set name "hiren"
Get value
get <key name>
get name #return "hiren"
Get value using range
getrange <key> <range>
getrange name 0 3 #return "hire"
Set value using range
setrange <key> <position> <value>
setrange name 5 RST
Override value
getset <key> <new value>
getset name "Rater Santo Tara"
Multiset value
mset <key> <value> <key> <value>
mset name "Rater Santo Tara" age 20
Increment value (only works for numbers)
incr age ## increment age by 1
Decrement value
decr <key>
Increment and decrement by specific number
incrby <key> 5
decrby <key> 20
Float increment (only for integer )
incrbyfloat <key> <float value>
Set expire time
setex <key> <time in second> <value>
setex name 4 hiren
Only set value if doesnt exits
setnx <key> <value>
Multi setnx
msetnx <key> <value> <key> <value>
Length of a value
strlen <key>
List
Lpush ( Left push )
lpush <list name or key > <value> <value>
Rpush ( Right push )
rpush <key or list name > <value> <value>
Lpushx and Rpushx (push if the list is exits)
lpushx <list name or the key > <value>
rpushx <list name or the key > <value>
Length of a list
llen <list name >
llen hiren
Get values
lrange <list name> <starting position> <ending position>
Tips : For grabbing whole list use starting position = 0 and ending position = -1
Pop from left or right side
lpop <value>
rpop <value>
Remove value
lrem <list name> 2 <value>
Insert middle
linsert <list name> before <existing value> <new value>
linsert <list name> after <existing value> <new value>
Get value using index
lindex <list name> <index no>
Set value using index
lset <list name> <index number> <new value>
Trim
ltrim <list name> <starting position> <ending position>
List sorting
Basic Sorting
sort <list key>
Sort with limit
sort <list key> limit <starting point> <ending point>
Sort descending or ascending
sort <list key> asc
sort <list key> desc
Sort characters
sort <list key name> alpha
Hash
Set command
hset <key> <subkey> <value>
hset hiren age 20
Get command
hget <key> <subkey>
Get all value
hgetall <key>
Return only keys or values
hvals <key>
hkeys <key>
Check value existence
hexits <key> <subkey>
Increment
hincrby <key> <subkey>
hincrbyfloat <key> <subkey>
Check length
hlen <key>
Multiple get
hmget <key> <subkey> <subkey>
Multipke set
hmset <key> <subkey> <value> <subkey> <value>
Set if doesnt exits
hsetnx <key> <subkey> <value>
Delete
hdel <key> <subkey>
Set
Add single or multiple value
sadd <set name> <value> <value>
Remove value
srem <set name> <value>
Show all members
smembers <set name>
CHeck if already exists or not
sismember <setname> <value>
Check how many item in set
scard <set name>
Take random item from set
sranmember <set name>
Take random member out of the set
spop <set name>
Check member defference in two set
sdiff <set name> <set name>
Check difference and store in new set
sdiff <new set name> <set name> <set name>
Intersection(common members) in both set
sinter <set 1> <set 2>
Union between sets
sunion <set 1> <set 2>
Store union result
sunionstore <new set > <set 1> <set 2>
Move value from 1 set to another
smove <old set> <new set> <value>
Other Commands
Search all keys
keys *
Search using specific pattern
keys hiren*
keys hire
Check if key exist
exits <key name>
Check type of a key
type <key name>
Delete key
del <key name>
Move to different database
move <key name> <database number>
move hiren 2
Select database
select <database number>
select 1
Expire
expire <key name> <Second>
Time to live
ttl <keyname> <secound>