Redis – Sorted Set Zrank Command
Redis ZRANK command returns the rank of member in the sorted set stored at the key, with the scores ordered from low to high. The rank (or index) is 0-based, which means…
Redis – Sorted Set Zrangebyscore Command
Redis ZRANGEBYSCORE command returns all the elements in the sorted set at the key with a score between min and max (including elements with score equal to min or max). The elements…
Redis – Sorted Set Zrangebylex Command
Redis ZRANGEBYLEX command returns the specified range of elements in the sorted set stored at the key. The elements are considered to be ordered from the lowest to the highest score. Lexicographical…
DB2 – Roles
Introduction A role is a database object that groups multiple privileges that can be assigned to users, groups, PUBLIC or other roles by using GRANT statement. Restrictions on roles A…
Redis – Sorted Set Zrange Command
Redis ZRANGE command returns the specified range of elements in the sorted set stored at the key. The elements are considered to be ordered from the lowest to the highest score. Lexicographical…
DB2 – Database Security
This chapter describes database security. Introduction DB2 database and functions can be managed by two different modes of security controls: AuthenticationAuthorization Authentication Authentication is the process of confirming that a…
Redis – Sorted Set Zlexcount Command
When all the elements in a sorted set are inserted with the same score, in order to force lexicographical ordering, this command returns the number of elements in the sorted…
SQL Tutorial
SQL is a database computer language designed for the retrieval and management of data in a relational database. SQL stands for Structured Query Language. This tutorial will give you a quick start to SQL.…
DB2 – Backup and Recovery
This chapter describes backup and restore methods of database. Introduction Backup and recovery methods are designed to keep our information safe. In Command Line Interface (CLI) or Graphical User Interface…
Redis – Sorted Set Zinterstore Command
Redis ZINTERSTORE command computes the intersection of numkeys sorted sets given by the specified keys, and stores the result in the destination. It is mandatory to provide the number of input keys…
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