Redis command Chinese manual

 

Redis command Chinese manual

 

I. Base

Del	Delete a key or a series of keys; del key1 key2 key3 key4
Type	Returns the Data Type of a key element (none: nonexistent, string: character, list, set, zset, hash)
Keys	Returns the matched Key List (Keys Foo *: Search for keys starting with Foo)
Randomkey	Obtain an existing key at random
Rename	Change the key name. If the name exists, the change fails.
Dbsize	Returns the total number of keys of the current database.
Expire	Set the expiration time of a key (in seconds), (expire Bruce 1000: the system automatically deletes the key after setting Bruce's key1000 seconds)
TTL	How long does it take to query the expiration time of a key? The returned time is second.
Select	Select Database
Move	Transfers keys from one database to another
Flushdb	Clear current database data
Flushall	Clear all database data
Set	Store a piece of data to the database set keyname datalength data (set Bruce 10 paitoubing: Save a string paitoubing with the key as burce and the string length as 10 to the database)
Get	Obtains the value of a key.
GetSet	GetSet can be understood as the obtained key value and then set this value for more convenient operations (set Bruce 10 paitoubing. In this case, you need to modify Bruce to 1234567890 and obtain the previous data paitoubing, getSet Bruce 10 1234567890)
Mget	Obtain data of multiple keys at a time (mget uid: 1: Name uid: 1: email uid: 1: ciy)
Setnx	The difference between setnx and set is that set can create and update the key value. If setnx does not exist, the key and value data will be created.
Setex	Setex = set + expire. It seems that I cannot test this version.
Mset	Set the value of multiple parameters at a time (mset uid: 1: Name shjuto uid: 1: email shjuto@gmail.com uid: 1: city 8 press ENTER Nanchang) The last value needs to press enter, like set, I don't know why.
Msetnx	If the set key does not exist, or is called a new key; set the value of multiple parameters at a time (mset uid: 1: Name shjuto uid: 1: email shjuto@gmail.com uid: 1: city 8 press ENTER Nanchang) The last value needs to press Enter. It is the same as set.
Incr	Auto-incrementing. Some classes are MySQL incr. (incr Global: UID)
Incrby	Auto-increment + length, (incrby uid 5) original base + 5 = Result
Decr	Auto-Subtraction
Decrby	Decrby auto-subtraction-lenght

 

Ii. Lists (no index sequence. The head position is 0 ,......)

 

Rpush	Append data to the end of the series (rpush listtest 10 \ n 1111111122)
Lpush	Append data to the sequence header (lpush listtest 10 \ n 2222222222)
Llen	Length of a sequence; (llen listtest)
Lrange	Returned sequence elements from a custom range (lrange testlist 0 2; returns the first 0 1 2 elements of the sequence testlist)
Ltrim	Trim Data out of a certain range (ltrim testlist 0 2; Retain 0 1 2 elements, and delete the remaining)
Lindex	Returns the value of the sequence at a certain position (lindex testlist 0; returns the element with zero position of the sequence testlist)
Lset	Update the value of an element at a certain position (lset testlist 0 5 \ n 55555 ;)
Lpop	Lpop key return and remove (atomically) the first element of the list at key
Rpop	Rpop key return and remove (atomically) the last element of the list at key
Lrem	Delete the sequence element (lrem testlist 0 5 \ n 33333; delete all the elements equal to 33333 in the sequence. Why not remove by key? I don't know why. It may be useful for deleting duplicate data)

 

Iii. Sets (with unordered index sequences)

 

Sadd	Add the element to the sets sequence. If the element does not exist, 1 is successfully added; otherwise, 0 is failed; (sadd testlist 3 \ n one)
Srem	Delete an element of the sets sequence. If the element is not stored, 0 is failed; otherwise, 1 is successful (Srem testlist 3 \ n one)
Spop	Randomly delete an element (spop testlist)
Smove	Move an element of a set sequence to another set sequence (smove testlist Test 3 \ n two; move the element two from the sequence testlist to test, and the two element will not exist in-testlist)
Scard	Count the number of elements in a sequence of sets (scard testlist)
Sismember	Production to check whether a data is in the sequence (sismember testlist 3 \ n two)
Sinter	The intersection of several sets, sinter key1 key2... Keyn (sinter test testlist), Niu B
Sinterstore	Record the calculated intersection to a new sequence sinterstore dstkey key1 key2... Keyn (sinterstore resultlist testlist test; records the intersection of testlisttest to resultlist)
Sunion	The Union of several sets of sequences sunion key1 key2... Keyn (sunion test testlist)
Sunionstore	Record the calculated union to a new sequence sunionstore dstkey key1 key2... Keyn (sunionstore resultlist testlist test; records the intersection of testlisttest to resultlist)
Sdiff	Sdiff key1 key2... Keyn: Calculate the Union of several sequences and the traveling set of a specific sequence. See the official example: Key1 = X, a, B, c Key2 = C Key3 = A, D Sdiff key1, key2, key3 => X, B
Sdiffstore	Sdiffstore dstkey key1 key2... Keyn, similar to the previous sinterstore sunionstore.
Smembers	Smembers key returns all elements of a sequence.
Srandmember	Srandmember key returns random elements of a sequence.