MySql Workbench CREATE TABLE students ( id INT PRIMARY KEY, first_name VARCHAR(50), last_name VARCHAR(50), age INT, major VARCHAR(50), faculty VARCHAR(50) ); CREATE TABLE location ( id INT PRIMARY KEY, name VARCHAR(50), rooms INT ); CREATE TABLE faculty ( id INT PRIMARY KEY, name VARCHAR(50), department_id INT ); 1. List last name of all students whose first name is longer than 4 letters in ascending order according to the last name. Duplicated rows should be removed from the output. 2. Count the total number of rooms in Location. 3. Find the number of students in each major.
SQL
SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.
Queries
A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.
MySql Workbench
CREATE TABLE students (
id INT PRIMARY KEY,
first_name VARCHAR(50),
last_name VARCHAR(50),
age INT,
major VARCHAR(50),
faculty VARCHAR(50)
);
CREATE TABLE location (
id INT PRIMARY KEY,
name VARCHAR(50),
rooms INT
);
CREATE TABLE faculty (
id INT PRIMARY KEY,
name VARCHAR(50),
department_id INT
);
1. List last name of all students whose first name is longer than 4 letters in ascending order according
to the last name. Duplicated rows should be removed from the output.
2. Count the total number of rooms in Location.
3. Find the number of students in each major.
4. Find the number of employees in each department who get no commission or have salary less than
5000.
5. Find the maximum salary of employees in each department that the employee was hired 15 years
before now. *hint: user TIMESTAMPDIFF(<unit type>,<Date_value 1>,<Date_value 2>), the unit
can be YEAR, MONTH, DAY, HOUR, etc...
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