nukopy / intro-sqlc

intro-sqlc

Environment

• Go 1.20.6
• sqlc v1.19.1

Run

• Run PostgreSQL

cd db
docker compose up -d

• Run application

cd app
go run main.go

Note

Init Go Module

mkdir intro-sqlc
cd intro-sqlc
go mod init github.com/nukopy/intro-sqlc

How to Use sqlc

1. Write SQL queries
2. Write sqlc.yaml
3. Execute sqlc generate
4. Write application code

Communicate with PostgreSQL Container

• Enter PostgreSQL container

docker compose exec db bash

• Connect PostgreSQL REPL

docker compose exec db psql -d intro_sqlc_db -U myuser

• Run SQL directly

docker compose exec db psql <db> -U <user> -c "<your sql>"

Example: delete records from specified relations

docker compose exec db psql intro_sqlc_db -U myuser -c "truncate authors, books;"

• Basic commands in PostgreSQL REPL

\du                   : show users
select current_user;  : show current user
\l                    : show databases
\c                    : show current database
\d                    : show relations (tables) on specified database