Mandos de sql
Select*= paras seleccionar toda una data
Select name from user= para seleccionar una data especifica
Select name, age from user= para seleccionar más de una columna
Select*from user whereid=,<,>,<=,>=,!= ( para filtrar)
SELECT id, age FROM user WHERE age <= 21; ( para filtrar mas de una columna)
SELECT id, name FROM user WHERE age > 50 OR height < 185;( para establecer un
rango)
SELECT id, name FROM user WHERE age < 70 AND age > 13;m ( para establecer un
rango asociativo)
SELECT vin, brand, model FROM car WHERE production_year NOT BETWEEN 1995
AND 2005;( para establecer otro tipo de rango)
SELECT id, name FROM user WHERE age BETWEEN 13 AND 70; ( otra forma de
rango)
SELECT * FROM user WHERE age NOT BETWEEN 20 AND 30; ( otra forma de rango)
SELECT*FROM MOVIE JOIN director on movie.director_id=director.id( para unir datos
de dos columnas )
SELECT vin FROM car WHERE (production_year < 1999 OR production_year > 2005)
AND (price < 4000 OR price > 10000); ( establecer dos rangos)
SELECT movie.id, title, production_year AS produced_in, name, birth_year AS born_in
FROM movie JOIN director ON director.id = director_id WHERE (title LIKE '%a%' AND
production_year > 2000 ) OR (birth_year between 1945 AND 1995);(ejemplo de
comando)
SELECT * FROM car WHERE brand = 'Ford';( ubicar un label)
SELECT vin, brand, model FROM car WHERE brand LIKE 'F%', '%F', ' %F%' ( para
ubicar valores que no sabemos el nombre completo)
SELECT * FROM car WHERE brand LIKE 'Volk_wagen';
SELECT * FROM car WHERE price IS NOT NULL;
SELECT * FROM car WHERE price IS NULL;
SELECT * FROM car WHERE (price * 0.2) > 2000; ( hacer operacion y comparar luego)
SELECT movie.title, director.name FROM movie JOIN director ON movie.director_id =
director.id;
select COUNT (invoiceid) from Invoice= para contar un numero de variables en una
columna
select MAX (total) from invoice 600810 02 00
SQL Statement Syntax
AND / OR
SELECT column_name(s)
FROM table_name
WHERE condition
AND|OR condition
ALTER TABLE
ALTER TABLE table_name
ADD column_name datatypeor
ALTER TABLE table_name
DROP COLUMN column_name
AS (alias)
SELECT column_name AS column_alias
FROM table_nameor
SELECT column_name
FROM table_name AS table_alias
BETWEEN
SELECT column_name(s)
FROM table_name
WHERE column_name
BETWEEN value1 AND value2
CREATE
DATABASE
CREATE DATABASE database_name
CREATE TABLE
CREATE TABLE table_name
(
column_name1 data_type,
column_name2 data_type,
column_name3 data_type,
...
)
CREATE INDEX
CREATE INDEX index_name
ON table_name (column_name)or
CREATE UNIQUE INDEX index_name
ON table_name (column_name)
CREATE VIEW
CREATE VIEW view_name AS
SELECT column_name(s)
FROM table_name
WHERE condition
DELETE
DELETE FROM table_name
WHERE some_column=some_valueor
DELETE FROM table_name
(Note: Deletes the entire table!!)
DELETE * FROM table_name
(Note: Deletes the entire table!!)
DROP DATABASE DROP DATABASE database_name
DROP INDEX
DROP INDEX table_name.index_name (SQL Server)
DROP INDEX index_name ON table_name (MS Access)
DROP INDEX index_name (DB2/Oracle)
ALTER TABLE table_name
DROP INDEX index_name (MySQL)
DROP TABLE
DROP TABLE table_name
EXISTS
IF EXISTS (SELECT * FROM table_name WHERE id = ?)
BEGIN
--do what needs to be done if exists
END
ELSE
BEGIN
--do what needs to be done if not
END
GROUP BY
SELECT column_name, aggregate_function(column_name)
FROM table_name
WHERE column_name operator value
GROUP BY column_name
HAVING
SELECT column_name, aggregate_function(column_name)
FROM table_name
WHERE column_name operator value
GROUP BY column_name
HAVING aggregate_function(column_name) operator value
IN
SELECT column_name(s)
FROM table_name
WHERE column_name
IN (value1,value2,..)
INSERT INTO
INSERT INTO table_name
VALUES (value1, value2, value3,....)or
INSERT INTO table_name
(column1, column2, column3,...)
VALUES (value1, value2, value3,....)
INNER JOIN
SELECT column_name(s)
FROM table_name1
INNER JOIN table_name2
ON
table_name1.column_name=table_name2.column_name
LEFT JOIN
SELECT column_name(s)
FROM table_name1
LEFT JOIN table_name2
ON
table_name1.column_name=table_name2.column_name
RIGHT JOIN
SELECT column_name(s)
FROM table_name1
RIGHT JOIN table_name2
ON
table_name1.column_name=table_name2.column_name
FULL JOIN
SELECT column_name(s)
FROM table_name1
FULL JOIN table_name2
ON
table_name1.column_name=table_name2.column_name
LIKE
SELECT column_name(s)
FROM table_name
WHERE column_name LIKE pattern
ORDER BY
SELECT column_name(s)
FROM table_name
ORDER BY column_name [ASC|DESC]
SELECT
SELECT column_name(s)
FROM table_name
SELECT *
SELECT *
FROM table_name
SELECT
DISTINCT
SELECT DISTINCT column_name(s)
FROM table_name
SELECT INTO
SELECT *
INTO new_table_name [IN externaldatabase]
FROM old_table_nameor
SELECT column_name(s)
INTO new_table_name [IN externaldatabase]
FROM old_table_name
SELECT TOP
SELECT TOP number|percent column_name(s)
FROM table_name
TRUNCATE TABLE TRUNCATE TABLE table_name
UNION
SELECT column_name(s) FROM table_name1
UNION
SELECT column_name(s) FROM table_name2
UNION ALL
SELECT column_name(s) FROM table_name1
UNION ALL
SELECT column_name(s) FROM table_name2
UPDATE
UPDATE table_name
SET column1=value, column2=value,...
WHERE some_column=some_value
WHERE
SELECT column_name(s)
FROM table_name
WHERE column_name operator value
select *from s3_files.airdna_property_export_vacasa__2018_03_2 where country
ilike 'chile'and city ilike 'alg%'limit 40
which city has the 3rd most air bnb units in argentina?
who has more units, chile or argentina?
how many units are in viña del mar?
-- by city
select country,city,count(property_id) as total
from s3_files.airdna_property_export_vacasa__2018_03_21
where country ilike'Chile'
group by city,country
order by total desc;
select city,property_id,count('annual_revenue_ltm_(usd)') as
total,"annual_revenue_ltm_(usd)"
from s3_files.airdna_property_export_vacasa__2018_03_21
where city ilike 'Algarrobo'
group by city,property_id,"annual_revenue_ltm_(usd)"
order by "annual_revenue_ltm_(usd)" des
Are there more units in Pucon or Iquique?
Pucon 1781
Iquique 1235
Which has the highest average daily rate... pucon or iquique??
Iquique 96.4210898203593
Pucon 145.0456861258529
Are there more units in Pucon or Iquique?
Pucon 1781
Iquique 1235
Which has the highest average daily rate... pucon or iquique??
Pucon 66681.08483699772
Algarrobo
66170.39239007894
what is the owner.id that owns have the three-room apartment with the highest annual revenue in
algarrobo
which unit had the highest occupancy % in santiago in 2017?