Redis-Data type common commands

5 types of data are inseparable from key, first listing the key's related commands.

Key related Operations

• List rules-compliant keys

  KEYS pattern

  Pattern supports the Glob style wildcard format, which is:

  ?	A character
  *	Any number of characters
  []	Declaring in-range characters

• Check if key exists

• Delete key

  DEL key

• View the type of key

  TYPE key

String

• Assignment value

• Integer increment or decrement, only if value is numeric

  INCR keyDECR key

  If you want to increase the number specified

  INCRBY key valueDECRBY key value

• Floating-point number increase

  INCRBYFLOAT key value

• Trailing append

  APPEND key value

• Get length

  STRLEN key

• Bit-related operations
  Specify access to the index:

  SETBIT key index valueGETBIT key index

  Get 1 of the quantity

  BITCOUNT key indexFrom indexTo

  Bitwise operations that support and OR not XOR operations, such as:

  BITOP OR key3 key1 key2

Hash column

• Assignment value

  HSET key field valueHGET key fieldHMSET key field1 value1 field2 value2HMGET key filed1 field2HGETALL key

• Determine if a field exists

  HEXISTS key field

  Does not exist then assign Value hsetnx key field value

• Field increment

  HINCRBY key field value

• Delete a field

  HDEL key field1 field2

• View field Information

  View field names

  HKEYS key

  View field values

  HVALS key

  Number of fields

  HLEN key

List

• Both ends increase

• Both ends eject

  LPOP keyRPOP key

• Get the number of elements

  LLEN key

• Get by index
  Gets the specified index value

  LINDEX key index  

  Get fragments

  LRANGE key indexFrom indexTo

• Assigning values by index

  LSET key index value

  Or find the pivot element from left to right in the list and insert value in front or back as determined by before or after

  LINSERT key BEFORE|AFTER pivot value

• Delete specified value

  Delete elements before count values are value

  LREM key count value

  Keep only elements in the index range

  LTRIM key indexFrom indexTo

Collection

• Add/Remove

• List all elements

  SMEMBERS key

• Set length

  SCARD key

• Determine if there is

  SISMEMBER key value

• Collection comparison

  • Subtraction

    SDIFF key1 key2

  • Intersection

    SINTER key1 key2

  • and set

    SUNION key1 key2

    Of course, we can also save the results of the comparison:

  • Subtraction

    SDIFFSTORE key3 key1 key2

  • Intersection

    SINTERSTORE key3 key1 key2

  • and set

    SUNIONSTORE key3 key1 key2

• Random Fetch/Eject
  Count is the number of returns, negative numbers return |count|, but can be repeated.

  SRANMEMBER key count

  Pop

  SPOP key

Ordered collection

• add element

• ZADD key score1 value1 score2 value2

• Delete Element

  • Delete the specified element

    ZREM key value1 value2

  • Delete by index range

    ZREMRANGEBYRANGE key indexFrom indexTo

  • Delete by score Range

    ZREMRANGEBYSCORE key min max

• Score increase

  ZINCRBY key score value

• Get points

  ZSCORE key value

• Get elements

  • Gets the elements within the specified range, in the score positive and reverse order, with the same fractions, in the UTF-8 encoding order of value, and score if the Withscore is added.

    ZRANGE key indexFrom indexTo [WITHSCORES]ZREVRANGE key indexFrom indexTo [WITHSCORES]

  • Gets the elements within the specified fractional range, still sorted by fractions.
    Takes score to the element between Min and Max, which by default includes elements equal to Min and Max.
    If you do not plan to include, then add "(" in front of Min or Max.
    The last limit usage is similar to SQL.

    ZRANGEBYSCORE key min max [WITHSCORES] [LIMIT offset count]

  • Get element rank

    ZRANK key valueZREVRANK key value

• Number of elements

  Collection size

  ZCARD key

  Specifies the number of points in the range, as with Zrangebyscore, where Min and Max are included by default, including Min and Max.

  ZCOUNT key min max

Redis-Data type common commands