Redis Setup and Client Access

Install Redis, then launch the interactive client and confirm connectivity.

String Type Commands

Work with key-value pairs where the value is treated as text or numeric data.

• Assign a value to a key:

SET itemA 8

• Retrieve the stored value:

GET itemA

• Increment numeric content by one:

INCR itemA

• Decrement numeric content by one:

DECR itemA

• Determine the character length of the value:

STRLEN itemA

List Type Commands

Manage ordered sequecnes of elements.

• Insert multiple entries at the head of list places:

LPUSH places Nanjing Suzhou Hangzhou

• Remove the first element from places:

LPOP places

• Transfer the tail element from labelList to the head of codeList:

RPOPLPUSH labelList codeList

• Insert an entry before a specified member in places:

LINSERT places BEFORE Nanjing Wuxi

• Get the count of items in a list:

LLEN places
LLEN labelList
LLEN codeList

Hash Type Commands

Handle mappings of fields to values within a single key.

• Create a hash purchase and set individual fields:

HSET purchase uid 1
HSET purchase buyer "wangwu"

• Populate a hash with multiple field-value pairs in one step:

HMSET purchase uid 1 buyer "wangwu"

• List all field names in purchase:

HKEYS purchase

• Count the fields in purchase:

HLEN purchase

• Fetch the value of a specific field:

HGET purchase uid

Key Management Commadns

Inspect and manipulate key metadata.

• Test if a key exists:

EXISTS sampleKey

• Find keys matching a glob-style pattern:

KEYS pattern
KEYS places
KEYS nam*

• Remove expiration from a key (make it persistent):

PERSIST places

• Enumerate all keys in the data base:

KEYS *