Category: SQL TUTORIAL
RANK Function: RANK function returns the rank of a value in a group of values. It is similar to DENSE_RANK function. The rank function can cause non-consecutive rankings if …
Indexes are special lookup tables that the database search engine can use to speed up data retrieval. To simply put, an index is a pointer to data in a …
STEP-1: Place the CSV or any delimited file in the Oracle server (Ex: stud_course.csv). For the sake of example, assume this file has 3 columns i.e. ID, Name, and …
PROBLEM STATEMENT: Pivot the ‘Occupation’ column in OCCUPATIONS table so that each ‘Name’ is sorted alphabetically and displayed underneath its corresponding Occupation. The output column headers should be Doctor, …
PROBLEM STATEMENT: We define an employee’s total earnings to be their monthly salary*months worked, and the maximum total earnings to be the maximum total earnings for any employee in …
PROBLEM STATEMENT: You are given a table, BTREE, containing two columns: Value and Parent, where ‘Value’ represents the value of a node in Binary Tree, and ‘Parent’ is the …
PROBLEM STATEMENT: one of the conglomerate corporations just acquired some new companies. Each of the companies follows this hierarchy. Given the table schemas below, write a query to print …
PROBLEM STATEMENT: The Trips table holds all taxi trips. Each trip has a unique Id, while Client_Id and Driver_Id are both foreign keys to the Users_Id at the Users …