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sql-lbd's Introduction

1. docker-compose.yml

Uwaga musi byc USER: postgres (bo potem przy imporcie bazy (restore) sie sapie)

version: "3.8"

services:
    postgresql:
        image: postgres:14.4
        restart: always
        ports:
            - 5432:5432
        environment:
            POSTGRES_PASSWORD: sqlhaslo
            POSTGRES_USER: postgres
            POSTGRES_DB: sqlbaza
    
    pgadmin:
        image: dpage/pgadmin4:latest
        restart: always
        ports:
            - 5050:80
        environment:
            PGADMIN_DEFAULT_EMAIL: [email protected]
            PGADMIN_DEFAULT_PASSWORD: sqlhaslo

2. Import bazy do pgadmin

Plik tar mozna po prostu przeciagnac tam w resotre opcji z kompa

3. Podstawy SQL

SELECT

  • Query data from table
SELECT first_name FROM customer;
  • Laczenie dwoch kolumn
SELECT first_name || ' ' || last_name, email FROM curstomer;

Column Alias

Pozwala na nazwanie wyniku.

SELECT first_name || ' ' || last_name AS full_name FROM customer;
SELECT first_name || ' ' || last_name AS "full name" FROM customer;

ORDER BY

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