# Connection

## Usage

Developers can create a database connection on their own:

```go
package main

import (
	"database/sql"
	_ "github.com/mattn/go-sqlite3"
)

func main() {	
	db, err := sql.Open("sqlite3", "./test.db")
	if err == nil {
		defer db.Close()
	}
	//...
}
```

or use a property file:

```go
package main

import (
	"github.com/doytowin/goooqo/rdb"
	_ "github.com/mattn/go-sqlite3"
)

func main() {
	db := rdb.Connect("app-sqlite3.properties")
	defer rdb.Disconnect(db)
	//...
}
```

## Property Format

The property file contains the parameters for different databases.

{% code title="app-sqlite3.properties" %}

```properties
driver=sqlite3
data_source=./test.db
```

{% endcode %}

{% code title="app-mysql.properties" %}

```properties
driver=mysql
mysql_url=tcp(localhost:3306)/demo?charset=utf8mb4&parseTime=true
mysql_username=root
mysql_password=root
```

{% endcode %}

More properties will be supported after the [dialect](/advanced/dialect.md) feature is ready.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://goooqo.docs.doyto.win/api/connection.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.