In Redis, the SDIFF command returns the members of the set resulting from the difference between the first set and all the successive sets. In other words, it returns all members of the first set that aren’t in any of the successive sets.
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Redis SCARD Command Explained
In Redis, the SCARD command returns the number of members in the specified set. This is referred to as the cardinality of the set.
Redis SADD Command Explained
In Redis, the SADD command allows us to add members to a key. We can add multiple members if required.
A Redis set is an unordered collection of unique strings (members).
Continue readingRedis OBJECT IDLETIME Command Explained
In Redis, we can use the OBECT IDLETIME command to check how many seconds has passed since the last access to a given key.
SQLite CASE Expression
In SQLite, the CASE expression compares a list of conditions and returns one of multiple possible expressions.
The CASE expression is included in the SQL standard (ISO/IEC 9075), and most major RDBMSs support it.
Redis LTRIM Command Explained
In Redis, the LTRIM command allows us to trim a list to a specified number of elements. We specify the starting and ending index, which is used to trim the list to just that range.
Redis LSET Command Explained
In Redis, the LSET command allows us to set a list element to a different value, based on its index.
Redis LREM Command Explained
In Redis, we can use the LREM command to remove one or more elements from a list. The number of elements removed depends on the arguments we pass.
Redis LINSERT Command Explained
In Redis, the LINSERT command allows us to insert an element into a list.
We have the choice of inserting it either before or after a specified element.
Continue readingRedis LPOS Command Explained
In Redis, the LPOS command returns the index of matching elements inside a list.