A subquery is a SQL query that runs within another query. They are nested inquiries that offer data to the query that comes before it.
Category: Oracle SQL*Plus
TRUNCATE TABLE in SQL
TRUNCATE TABLE is a Data Definition Language operation in SQL that marks the extent of a table for deallocation. This operation removes all data from
SQL-92 and SQL-89 Joins
SQL-92 and SQL-89 joins are supported by most RDBMSs, including Apache Impala. This article will explain how the syntax is written in both ways and
Apache Hive Aggregate Functions – Part-2
This is continuation part of “Apache Hive Aggregate Functions” Function: VARIANCE & VAR_POP Returns the population variance of the total number of records present in
SQL Assignment-1
For beginners to intermediate levels, this is a quick test / assignment to check how familiar they are with SQL. Such types of exercises will
Joins in HiveQL
As we discussed earlier, HiveQL handles structured data only, much like SQL. This doesn’t mean that Hive just manages structured data, it also processes and
Big Data and SQL 