Redis – Server
Redis server commands are basically used to manage Redis server. Example Following example explains how we can get all statistics and information about the server redis 127.0.0.1:6379> INFO # Server…
SQL – UNIONS CLAUSE
The SQL UNION clause/operator is used to combine the results of two or more SELECT statements without returning any duplicate rows. To use this UNION clause, each SELECT statement must…
VSAM – Components
VSAM consists of following components − VSAM ClusterControl AreaControl Interval VSAM Cluster VSAM are the logical datasets for storing records and are known as clusters. A cluster is an association…
SQL – Using Joins
The SQL Joins clause is used to combine records from two or more tables in a database. A JOIN is a means for combining fields from two tables by using values common…
VSAM – Home
VSAM stands for Virtual Storage Access Method. VSAM is a file storage access method used in MVS, ZOS and OS/390 operating systems. It was introduced by IBM in 1970's. It…
Redis – Connection Select Command
Redis SELECT command is used to select the DB having the specified zero-based numeric index. New connections always use DB 0. Return Value String reply. Syntax Following is the basic syntax of…
SQL – Constraints
Constraints are the rules enforced on the data columns of a table. These are used to limit the type of data that can go into a table. This ensures the…
Redis – Connection Quit Command
Redis QUIT command asks the server to close the connection. The connection is closed as soon as all pending replies have been written to the client. Return Value String reply OK. Syntax…
SQL – SORTING Results
The SQL ORDER BY clause is used to sort the data in ascending or descending order, based on one or more columns. Some databases sort the query results in an ascending order…
Redis – Connection Ping Command
Redis PING command is used to check whether the server is running or not. Return Value String reply. Syntax Following is the basic syntax of Redis PING command. redis 127.0.0.1:6379> PING Example redis 127.0.0.1:6379>…
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