COBOL – Data Types
Data Division is used to define the variables used in a program. To describe data in COBOL, one must understand the following terms − Data NameLevel NumberPicture ClauseValue Clause 01…
Redis – Server Debug Segfault Command
Redis DEBUG SEGFAULT performs an invalid memory access that crashes Redis. It is used to simulate bugs during the development. Return Value String reply. Syntax Following is the basic syntax of Redis DEBUG…
Google Charts – Stacked bar chart
Following is an example of a stacked bar chart. We've already seen the configuration used to draw this chart in the Google Charts Configuration Syntax chapter. So, let's see the complete example.…
Redis – Server Debug Object Command
Redis DEBUG OBJECT is a debugging command that should not be used by the clients. Check the OBJECT command instead. Return Value String reply. Syntax Following is the basic syntax of Redis DEBUG…
COBOL – Basic Syntax
Character Set 'Characters' are lowest in the hierarchy and they cannot be divided further. The COBOL Character Set includes 78 characters which are shown below − Sr.No.Character & Description1A-ZAlphabets(Upper Case)2a-zAlphabets…
Redis – Server Dbsize Command
Redis DBSIZE command is used to get the number of keys in selected database. Return Value Integer reply. Syntax Following is the basic syntax of Redis DBSIZE command. redis 127.0.0.1:6379> DBSIZE Example redis 127.0.0.1:6379>…
Google Charts – Grouped bar chart
Following is an example of a grouped bar chart. We've already seen the configuration used to draw this chart in the Google Charts Configuration Syntax chapter. So let's see the complete example.…
SQL – Handling Duplicates
There may be a situation when you have multiple duplicate records in a table. While fetching such records, it makes more sense to fetch only unique records instead of fetching…
Redis – Server Config Resetstat Command
Redis CONFIG RESETSTAT command resets the statistics reported by Redis using the INFO command. Following counters can be reset using this command − Keyspace hitsKeyspace missesNumber of commands processedNumber of connections receivedNumber…
SQL – Using Sequences
A sequence is a set of integers 1, 2, 3, ... that are generated in order on demand. Sequences are frequently used in databases because many applications require each row…
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