Numeration | Check | Stiker | Topic | Quantization | Edit Gitpot | Downloads | link |
---|---|---|---|---|---|---|---|
001 | ✔️ | Downloads | ✔️ | 💻 | 💾 | ⬅️ back | |
002 | ✔️ | Usando la DB | ✔️ | 💻 | 💾 | ⬅️ back | |
003 | ✔️ | Visualizar Informacion Tablas | ✔️ | 💻 | 💾 | ⬅️ back | |
004 | ✔️ | SELECT | ✔️ | 💻 | 💾 | ⬅️ back | |
005 | ✔️ | SELECT DISTINCT | ✔️ | 💻 | 💾 | ⬅️ back | |
006 | ✔️ | SELECT COUNT | ✔️ | 💻 | 💾 | ⬅️ back | |
007 | ✔️ | WHERE | ✔️ | 💻 | 💾 | ⬅️ back | |
008 | ✔️ | ORDER BY | ✔️ | 💻 | 💾 | ⬅️ back | |
009 | ✔️ | LIMIT | ✔️ | 💻 | 💾 | ⬅️ back | |
010 | ✔️ | BETWEEN | ✔️ | 💻 | 💾 | ⬅️ back | |
011 | ✔️ | IN | ✔️ | 💻 | 💾 | ⬅️ back | |
012 | ✔️ | LIKE | ✔️ | 💻 | 💾 | ⬅️ back | |
013 | ✔️ | HAVING | ✔️ | 💻 | 💾 | ⬅️ back | |
014 | ✔️ | GROUP BY | ✔️ | 💻 | 💾 | ⬅️ back | |
015 | ✔️ | AS | ✔️ | 💻 | 💾 | ⬅️ back |
Numeration | Check | Stiker | Topic | Quantization | Edit Gitpot | Downloads | link |
---|---|---|---|---|---|---|---|
016 | ✔️ | AS | ✔️ | 💻 | 💾 | ⬅️ back | |
017 | ✔️ | INNER JOIN | ✔️ | 💻 | 💾 | ⬅️ back | |
018 | ✔️ | FULL JOIN | ✔️ | 💻 | 💾 | ⬅️ back | |
019 | ✔️ | LEFT JOIN | ✔️ | 💻 | 💾 | ⬅️ back | |
020 | ✔️ | RIGHT JOIN | ✔️ | 💻 | 💾 | ⬅️ back | |
021 | ✔️ | UNION | ✔️ | 💻 | 💾 | ⬅️ back |
Numeration | Check | Stiker | Topic | Quantization | Edit Gitpot | Downloads | link |
---|---|---|---|---|---|---|---|
022 | ✔️ | Formato Hora Fecha | ✔️ | 💻 | 💾 | ⬅️ back | |
023 | ✔️ | Funciones Matematicas | ✔️ | 💻 | 💾 | ⬅️ back | |
024 | ✔️ | Funciones Caracteres | ✔️ | 💻 | 💾 | ⬅️ back | |
025 | ✔️ | Subconsulta Valor numerico | ✔️ | 💻 | 💾 | ⬅️ back | |
026 | ✔️ | Subconsulta por lista de Valores | ✔️ | 💻 | 💾 | ⬅️ back | |
027 | ✔️ | Subconsulta con EXITS | ✔️ | 💻 | 💾 | ⬅️ back |
Numeration | Check | Stiker | Topic | Quantization | Edit Gitpot | Downloads | link |
---|---|---|---|---|---|---|---|
028 | ✔️ | Bases de Datos | ✔️ | 💻 | 💾 | ⬅️ back | |
029 | ✔️ | Crear Tabla SQL | ✔️ | 💻 | 💾 | ⬅️ back | |
030 | ✔️ | Insert SQL | ✔️ | 💻 | 💾 | ⬅️ back | |
031 | ✔️ | UPDATE | ✔️ | 💻 | 💾 | ⬅️ back | |
032 | ✔️ | DELETE | ✔️ | 💻 | 💾 | ⬅️ back | |
033 | ✔️ | ALTER | ✔️ | 💻 | 💾 | ⬅️ back | |
034 | ✔️ | CASE | ✔️ | 💻 | 💾 | ⬅️ back | |
035 | ✔️ | COALESCE | ✔️ | 💻 | 💾 | ⬅️ back | |
036 | ✔️ | CAST | ✔️ | 💻 | 💾 | ⬅️ back | |
037 | ✔️ | Importar Ficheros | ✔️ | 💻 | 💾 | ⬅️ back | |
038 | ✔️ | Exportar Ficheros | ✔️ | 💻 | 💾 | ⬅️ back |
⚙️ Install PostgreSQL Linux How to install and use PostgreSQL on Ubuntu
⚙️ Install PostgreSQL Windows Download the installer for windows
Correccion del Error PATH
Cambiar la Direccion del PATH de PostgreSQL
Install Postgres
Delete Postgres
Restore Database
pg_restore -h 127.0.0.1 -p 5432 -U user -d database < backup.sql
psql -h 127.0.0.1 -p 5432 -U user -W -d dabatase < backup.sql
Backup Base de Datos
pg_dump -U postgres -W -h 127.0.0.1 database > backup.sql
Create Postgres Password
sudo -u postgres psql
\password
Enter password: ...
Inicializar Postgres - Ubuntu terminal
service postgresql start
service postgresql status
service postgresql stop
Usar Postgres
Cambie a la cuenta de postgres
sudo -i -u postgres
Acceder de inmediato a una línea de comandos de PostgresSQL
psql
ver base de datos Acceder de inmediato a una línea de comandos de PostgresSQL
\l
entrar a la base de datos Acceder de inmediato a una línea de comandos de PostgresSQL
\dt <nasededatos>
Create Postgres User
CREATE USER newuser WITH PASSWORD 'password';
GRANT ALL PRIVILEGES ON DATABASE database to newuser;
Ver Usuarios
SELECT usename FROM pg_user;
Rename a database
ALTER DATABASE olddbname RENAME TO newdbname;
Delete user postgres
Configuration Information
La utilidad postgresql pg_lsclusters muestra información sobre la configuración y el estado de todos los clusters, incluyendo el número de puerto.
$ pg_lsclusters
Migrating from SQLite to Postgresql - Django
Migrating data from SQlite to PostgreSQL. Shift database from SQlite to PostgreSQL in Django Migrating data from SQlite to PostgreSQL | Django
Data.json
python manage.py dumpdata > data.json
Example Setting Django
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': 'p2phelp_db',
'USER': 'briandb',
'PASSWORD': 'briandb',
'HOST': 'localhost',
'PORT': '5432'
}
}
Python Django Shell
python manage.py migrate --run-syncdb
python manage.py shell
from django.contrib.contenttypes.models import ContentType
ContentType.objects.all().delete()
exit()
python manage.py loaddata data.json
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
002 | Usando la DB | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
003 | Visualizar Informacion Tablas | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
004 | SELECT | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
005 | SELECT DISTINCT | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
006 | SELECT COUNT | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
007 | WHERE | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
008 | ORDER BY | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
009 | LIMIT | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
010 | BETWEEN | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
011 | IN | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
012 | LIKE | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
SELECT "PRODUCTO", SUM("IMPORTE")
FROM esquema."PEDIDOS"
GROUP BY "PRODUCTO"
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
013 | GROUP-BY | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
014 | HAVING | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
SELECT "ID" AS "CLAVE", "PRODUCTO" AS "VALOR 0", "IMPORTE" AS "VALOR 1"
from esquema."PEDIDOS"
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
015 | AS | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
016 | INNER JOIN | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
017 | FULL JOIN | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
018 | LEFT JOIN | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
019 | RIGHT JOIN | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
020 | UNION | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
SELECT EXTRACT (DAY FROM "FECHA") AS "DIAA"
FROM esquema."PEDIDOS" -- EXTRAE EL DIA
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
021 | Formato Hora Fecha | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
022 | Funciones Matematicas | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
023 | Funciones Caracteres | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
024 | Subconsulta Valor numerico | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
025 | Subconsulta por lista de Valores | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
-- Subconsulta con EXITS
SELECT "NOMBRE", "APELLIDO1", "DEP"
from esquema."PERSONAS" as p
where EXISTS
(SELECT * FROM esquema."DEPARTAMENTOS" as D
WHERE D."DEP" = P."DEP")
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
026 | Subconsulta con EXITS | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
PostgreSQL CHECK constraint for new tables
DROP TABLE IF EXISTS employees;
CREATE TABLE employees (
id SERIAL PRIMARY KEY,
first_name VARCHAR (50),
last_name VARCHAR (50),
birth_date DATE CHECK (birth_date > '1900-01-01'),
joined_date DATE CHECK (joined_date > birth_date),
salary numeric CHECK(salary > 0)
);
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
027 | Base de Datos | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Tabla Usuarios
Create table usuarios(
id_usuario SERIAL PRIMARY KEY,
nombre VARCHAR(45) not NULL,
apellido1 VARCHAR(45) not NULL,
apellido2 VARCHAR(45) not NULL,
contraseña VARCHAR(45) not NULL,
Email VARCHAR(45) unique NOT NULL,
Fecha_cracion TIMESTAMP unique NOT NULL
)
Tabla Ocupaciones
CREATE TABLE ocupaciones(
id_ocupaciones serial PRIMARY KEY,
tipo_ocupacion VARCHAR(45) not NULL,
Descrpcion VARCHAR(100) not NULL
)
Tabla Usuario -ocupaciones (FOREING KEY)
CREATE Table usuario_ocupaciones(
id_usuario INTEGER REFERENCES usuarios(id_usuario), -- hace referencia
id_ocupacion INTEGER REFERENCES ocupaciones(id_ocupacion)
)
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
028 | Crear Tabla SQL | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Insertar a la Tabla Usuarios
INSERT INTO usuarios(nombre, apellido1, apellido2, contraseña, email, fecha_creacion)
values('Brian', 'marquez', 'inca roca', '123', 'brian@mail.com', CURRENT_TIMESTAMP)
_Insertar a la Tabla Usuarios_
INSERT INTO usuarios(nombre, apellido1, apellido2, contraseña, email, fecha_creacion)
values('Maria', 'Isabel', 'Isabel', '456', 'maria@mail.com', CURRENT_TIMESTAMP)
Insertar a la Tabla Ocupaciones
Insert Into ocupaciones(tipo_ocupacion, descripcion)
values ('DBA', 'Reliaza Mantenimiento a la base de datos')
Insert into usuario_ocupaciones(id_usuario, id_ocupacion)
values (1,1)
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
029 | Insert SQL | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
select * from usuarios
update usuarios set email='brianenrique@mail.com'
where id_usuario = 1
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
30 | Insert SQL | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Insert Into ocupaciones(tipo_ocupacion, descripcion)
values ('programador', 'Reliaza Mantenimiento de lo sistemas')
Insert Into ocupaciones(tipo_ocupacion, descripcion)
values ('programador 2', 'Reliaza Mantenimiento a la base de datos 2')
/* delete */
delete from ocupaciones
where id_ocupacion = 3
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
31 | DELETE | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
32 | ALTER | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
33 | CASE | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
34 | COALESCE | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
35 | CAST | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
36 | Importar Ficheros | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
Numeration | File | Link | Folk | Code | Version | State | Download | Go back |
---|---|---|---|---|---|---|---|---|
37 | Exportar Ficheros | ✔️ | ✔️ | yes | yes | ✔️ | 💾 | ⬅️Atras |
- Install Terminal
Install Terminal 1 - Digitalocean
Install Terminal 2 - PostgreSQL
- Comandos
Crear Usuario
Para crear un usuario de PostgreSQL, utilice la siguiente instrucción SQL:
CREATE USER myuser WITH PASSWORD 'secret_passwd';
También puede crear un usuario con la siguiente instrucción SQL:
CREATE ROLE myuser WITH LOGIN PASSWORD 'secret_passwd';
Server | Name | Authors | Editorial | ISBN | Link |
OneDrive | Mastering PostgreSQL 13 | Paul Deitel, Harvey Deitel | Packt | N 978-1-80056-749-8 | Mastering PostgreSQL 13 |
🩸 Hacer una donación PAYPAL 🍵
A | B | ||
C | E | ||
F | G |