 CREATE TABLE girl (
    Girl_ID INT PRIMARY KEY,
    Girl_name VARCHAR(255),
    Girl_age INT,
    Girl_height DECIMAL(5,2)
);

INSERT INTO girl  VALUES (95, 'Spandana', 17, 154);
INSERT INTO girl  VALUES (98, 'Praveena', 18, 147);
INSERT INTO girl  VALUES (79, 'Nethra', 19, 163);
INSERT INTO girl  VALUES (99, 'Roja', 20, 165);
INSERT INTO girl VALUES (94, 'Sankalpa', 20, 178);
INSERT INTO girl  VALUES (91, 'Sahithi', 17, 159);
INSERT INTO girl  VALUES (92, 'Saira', 16, 157);
INSERT INTO girl  VALUES (93, 'Samhitha', 15, 169);
INSERT INTO girl  VALUES (89, 'Sresta', 14, 172);
INSERT INTO girl  VALUES (88, 'Amrutha', 20, 159);

CREATE TABLE prefer (
    Girl_ID INT,
    Saree_Id INT,
    Purchase_date DATE,
    PRIMARY KEY (Girl_ID, Saree_Id)
);

INSERT INTO prefer VALUES (95, 218, '2001-02-20');
INSERT INTO prefer VALUES (78, 218, '2002-04-21');
INSERT INTO prefer VALUES (79, 218, '2021-05-20');
INSERT INTO prefer VALUES (95, 219, '2015-05-19');
INSERT INTO prefer VALUES (78, 219, '2007-07-21');
INSERT INTO prefer VALUES (79, 219, '2005-04-20');
INSERT INTO prefer VALUES (95, 220, '2015-02-19');
INSERT INTO prefer VALUES (78, 220, '2014-04-21');
INSERT INTO prefer VALUES (95, 221, '2019-02-20');
INSERT INTO prefer VALUES (88, 221, '2021-01-19');

CREATE TABLE sarees (
    Saree_Id INT PRIMARY KEY,
    Saree_name VARCHAR(255),
    Saree_color VARCHAR(50)
);

INSERT INTO sarees VALUES (218, 'Kancheevaram', 'Lavender');
INSERT INTO sarees VALUES (219, 'Kancheevaram', 'Pink');
INSERT INTO sarees VALUES (220, 'Dharmavara', 'Blue');
INSERT INTO sarees VALUES (221, 'Chirala', 'Pink');

SELECT* from girl;
SELECT* from prefer;
SELECT* from sarees;

SELECT g.Girl_name
FROM girl g
JOIN prefer p ON g.Girl_ID = p.Girl_ID
WHERE p.Saree_Id = 220;

SELECT distinct g.Girl_name
FROM girl g
JOIN prefer p ON g.Girl_ID = p.Girl_ID
JOIN sarees s ON p.Saree_Id = s.Saree_Id
WHERE s.Saree_color = 'Pink';

SELECT s.Saree_color
FROM girl g
JOIN prefer p ON g.Girl_ID = p.Girl_ID
JOIN sarees s ON p.Saree_Id = s.Saree_Id
WHERE g.Girl_name = 'Nethra';

SELECT DISTINCT g.Girl_name
FROM girl g
JOIN prefer p ON g.Girl_ID = p.Girl_ID;

SELECT DISTINCT g.Girl_name
FROM girl g
JOIN prefer p ON g.Girl_ID = p.Girl_ID
JOIN sarees s ON p.Saree_Id = s.Saree_Id
WHERE s.Saree_color IN ('Pink', 'Lavender');

SELECT DISTINCT g.Girl_name
FROM girl g
JOIN prefer p1 ON g.Girl_ID = p1.Girl_ID
JOIN sarees s1 ON p1.Saree_Id = s1.Saree_Id
JOIN prefer p2 ON g.Girl_ID = p2.Girl_ID
JOIN sarees s2 ON p2.Saree_Id = s2.Saree_Id
WHERE s1.Saree_color = 'Pink' AND s2.Saree_color = 'Lavender';

SELECT DISTINCT g.Girl_ID
FROM girl g
JOIN prefer p ON g.Girl_ID = p.Girl_ID
JOIN sarees s ON p.Saree_Id = s.Saree_Id
WHERE s.Saree_color = 'Pink' AND g.Girl_ID NOT IN (
    SELECT DISTINCT g2.Girl_ID
    FROM girl g2
    JOIN prefer p2 ON g2.Girl_ID = p2.Girl_ID
    JOIN sarees s2 ON p2.Saree_Id = s2.Saree_Id
    WHERE s2.Saree_color = 'Lavender'
);

SELECT DISTINCT g.Girl_ID
FROM girl g
LEFT JOIN prefer p ON g.Girl_ID = p.Girl_ID
WHERE g.Girl_age > 14 OR p.Saree_Id = 221;

SELECT DISTINCT g.Girl_name
FROM girl g
LEFT JOIN prefer p ON g.Girl_ID = p.Girl_ID
LEFT JOIN sarees s ON p.Saree_Id = s.Saree_Id
WHERE s.Saree_color IS NULL OR s.Saree_color != 'Blue';

SELECT *
FROM girl
WHERE Girl_height = (SELECT MAX(Girl_height) FROM girl);

SELECT g.*
FROM girl g
JOIN girl saira ON saira.Girl_name = 'Saira'
WHERE g.Girl_age > saira.Girl_age;

SELECT g.Girl_name
FROM girl g
WHERE NOT EXISTS (
    SELECT s.Saree_Id
    FROM sarees s
    WHERE NOT EXISTS (
        SELECT p.Saree_Id
        FROM prefer p
        WHERE p.Girl_ID = g.Girl_ID AND p.Saree_Id = s.Saree_Id
    )
);

SELECT s.Saree_Id, s.Saree_color, COUNT(p.Girl_ID) AS PreferenceCount
FROM sarees s
LEFT JOIN prefer p ON s.Saree_Id = p.Saree_Id
WHERE s.Saree_color = 'Pink'
GROUP BY s.Saree_Id, s.Saree_color;

SELECT COUNT(DISTINCT Girl_name) AS NumberOfGirlNames
FROM girl;

created 1 year ago by Ayush Sharma

MySQL online editor

Write, Run & Share MySQL queries online using OneCompiler's MySQL online editor and compiler for free. It's one of the robust, feature-rich online editor and compiler for MySQL. Getting started with the OneCompiler's MySQL editor is really simple and pretty fast. The editor shows sample boilerplate code when you choose language as 'MySQL' and start writing queries to learn and test online without worrying about tedious process of installation.

About MySQL

MySQL is a open-source, free and very popular relational database management system which is developed, distributed and supported by Oracle corporation.

Key Features:

Open-source relational database management systems.
Reliable, very fast and easy to use database server.
Works on client-server model.
Highly Secure and Scalable
High Performance
High productivity as it uses stored procedures, triggers, views to write a highly productive code.
Supports large databases efficiently.
Supports many operating systems like Linux*,CentOS*, Solaris*,Ubuntu*,Windows*, MacOS*,FreeBSD* and others.

Syntax help

Commands

1. CREATE

CREATE TABLE table_name (
                column1 datatype,
                column2 datatype,
                ....);

Example

CREATE TABLE EMPLOYEE (
  empId INTEGER PRIMARY KEY,
  name TEXT NOT NULL,
  dept TEXT NOT NULL
);

2. ALTER

ALTER TABLE Table_name ADD column_name datatype;

Example

INSERT INTO EMPLOYEE VALUES (0001, 'Dave', 'Sales');

3. TRUNCATE

TRUNCATE table table_name;

4. DROP

DROP TABLE table_name;

5. RENAME

RENAME TABLE table_name1 to new_table_name1;

6. COMMENT

Single-Line Comments:

 --Line1;

Multi-Line comments:

   /* Line1,
   Line2 */

DML Commands

1. INSERT

INSERT INTO table_name (column1, column2, column3, ...) VALUES (value1, value2, value3, ...);

Note: Column names are optional.

Example

INSERT INTO EMPLOYEE VALUES (0001, 'Ava', 'Sales');

2. SELECT

SELECT column1, column2, ...
FROM table_name
[where condition];

Example

SELECT * FROM EMPLOYEE where dept ='sales';

3. UPDATE

UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;

Example

UPDATE EMPLOYEE SET dept = 'Sales' WHERE empId='0001';

4. DELETE

DELETE FROM table_name where condition;

Example

DELETE from EMPLOYEE where empId='0001';

Indexes

1. CREATE INDEX

  CREATE INDEX index_name on table_name(column_name);

To Create Unique index:

  CREATE UNIQUE INDEX index_name on table_name(column_name);

2. DROP INDEX

DROP INDEX index_name ON table_name;

Views

1. Create a View

Creating a View:
CREATE VIEW View_name AS 
Query;

2. How to call view

SELECT * FROM View_name;

3. Altering a View

ALTER View View_name AS 
Query;

4. Deleting a View

DROP VIEW View_name;

Triggers

1. Create a Trigger

CREATE TRIGGER trigger_name trigger_time trigger_event
    ON tbl_name FOR EACH ROW [trigger_order] trigger_body
/* where
trigger_time: { BEFORE | AFTER }
trigger_event: { INSERT | UPDATE | DELETE }
trigger_order: { FOLLOWS | PRECEDES } */

2. Drop a Trigger

DROP TRIGGER [IF EXISTS] trigger_name;

Stored Procedures

1. Create a Stored Procedure

CREATE PROCEDURE sp_name(p1 datatype)
BEGIN
/*Stored procedure code*/
END;

2. How to call Stored procedure

CALL sp_name;

3. How to delete stored procedure

DROP PROCEDURE sp_name;

Joins

1. INNER JOIN

SELECT * FROM TABLE1 INNER JOIN TABLE2 where condition;

2. LEFT JOIN

SELECT * FROM TABLE1 LEFT JOIN TABLE2 ON condition;

3. RIGHT JOIN

SELECT * FROM TABLE1 RIGHT JOIN TABLE2 ON condition;

4. CROSS JOIN

SELECT select_list from TABLE1 CROSS JOIN TABLE2;