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You are given a table, BST, containing two columns: N and P, where N represents the value of a node in Binary Tree, and P is the parent of N. Write a query to find the node type of Binary Tree ordered by the value of the node. Output one of the following for each node: Root: If node is root node. Leaf: If node is leaf node. Inner: If node is neither root nor leaf node. Sample Input # 나의 해답 SELEC..

개념 " 데이터를 구조적으로 모아둔 데이터 집합소 " 관계형 데이터베이스(Relational Database - : RDB) 데이터를 열과 행을 가진 테이블 형태로 표현하며, 구조적으로 데이터 관리를 한다. NoSQL 구조적 데이터, 가변적인 형태로 관리 및 가공, 데이터 처리 속도가 빠르다. 빅데이터에 최적화되어있다. 용어 SQL structured Query Language RDBMS의 데이터를 관리하기 위해 설계된 특수 목적의 프로그래밍 언어 SQL 문법 데이터 정의 언어(DDL) CREATE, DROP, ALTER 데이터 조작 언어(DML) SELECT INSERT, UPDATE, DELETE 데이터 제어 언어(DCL) GRANT, REVOKE CRUD CREATE, READ, UPDATE, DE..

Pivot the Occupation column in OCCUPATIONS so that each Name is sorted alphabetically and displayed underneath its corresponding Occupation. The output column headers should be Doctor, Professor, Singer, and Actor, respectively. Note: Print NULL when there are no more names corresponding to an occupation. Input Format The OCCUPATIONS table is described as follows: Occupation will only contain on..

Generate the following two result sets: Query an alphabetically ordered list of all names in OCCUPATIONS, immediately followed by the first letter of each profession as a parenthetical (i.e.: enclosed in parentheses). For example: AnActorName(A), ADoctorName(D), AProfessorName(P), and ASingerName(S). Query the number of ocurrences of each occupation in OCCUPATIONS. Sort the occurrences in ascend..

Write a query identifying the type of each record in the TRIANGLES table using its three side lengths. Output one of the following statements for each record in the table: Equilateral: It's a triangle with sides of equal length. Isosceles: It's a triangle with sides of equal length. Scalene: It's a triangle with sides of differing lengths. Not A Triangle: The given values of A, B, and C don't fo..

Write a query that prints a list of employee names (i.e.: the name attribute) for employees in Employee having a salary greater than per month who have been employees for less than months. Sort your result by ascending employee_id. Input Format The Employee table containing employee data for a company is described as follows: where employee_id is an employee's ID number, name is their name, mont..

Write a query that prints a list of employee names (i.e.: the name attribute) from the Employee table in alphabetical order. Input Format The Employee table containing employee data for a company is described as follows: where employee_id is an employee's ID number, name is their name, months is the total number of months they've been working for the company, and salary is their monthly salary. ..

Query the Name of any student in STUDENTS who scored higher than Marks. Order your output by the last three characters of each name. If two or more students both have names ending in the same last three characters (i.e.: Bobby, Robby, etc.), secondary sort them by ascending ID. # 나의 해답 SELECT NAME FROM STUDENTS WHERE MARKS > 75 ORDER BY SUBSTR(NAME,-3), ID ASC;

Query the list of CITY names from STATION that do not start with vowels and do not end with vowels. Your result cannot contain duplicates. Input Format The STATION table is described as follows: # 나의 해답 SELECT DISTINCT CITY FROM STATION WHERE SUBSTR(CITY,1,1) NOT IN ('A','E','I','O','U') AND SUBSTR(CITY,-1,1) NOT IN ('a','e','i','o','u') ;

Query the list of CITY names from STATION that either do not start with vowels or do not end with vowels. Your result cannot contain duplicates. Input Format The STATION table is described as follows: # 나의 해답 SELECT DISTINCT CITY FROM STATION WHERE SUBSTR(CITY,1,1) NOT IN ('A','E','I','O','U') OR SUBSTR(CITY,-1,1) NOT IN ('a','e','i','o','u') ;