> ## Documentation Index
> Fetch the complete documentation index at: https://cockroachlabs.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Build a Simple CRUD Go App with CockroachDB and the Go pgx Driver

export const InternalLink = ({version, path = "", children, ...props}) => {
  let detectedVersion = version || "stable";
  if (typeof window !== 'undefined' && !version) {
    const match = window.location.pathname.match(/\/docs\/([^/]+)/);
    if (match) {
      detectedVersion = match[1];
    }
  }
  const normalizedPath = path.startsWith("/") ? path.slice(1) : path;
  return <a href={`/docs/${detectedVersion}/${normalizedPath}`} {...props}>
      {children}
    </a>;
};

export const InternalLink = ({version, path = "", children, ...props}) => {
  let detectedVersion = version || "stable";
  if (typeof window !== 'undefined' && !version) {
    const match = window.location.pathname.match(/\/docs\/([^/]+)/);
    if (match) {
      detectedVersion = match[1];
    }
  }
  const normalizedPath = path.startsWith("/") ? path.slice(1) : path;
  return <a href={`/docs/${detectedVersion}/${normalizedPath}`} {...props}>
      {children}
    </a>;
};

This tutorial shows you how build a simple CRUD Go application with CockroachDB and the [Go pgx driver](https://pkg.go.dev/github.com/jackc/pgx).

## Step 1. Start CockroachDB

<Tabs>
  <Tab title="Use CockroachDB Cloud">
    ### Choose your installation method

    You can create a CockroachDB Basic cluster using either the CockroachDB Cloud Console, a web-based graphical user interface (GUI) tool, or `ccloud`, a command-line interface (CLI) tool.

    <Tabs>
      <Tab title="Cloud Console (GUI)">
        ### Create a free cluster

        <Note>
          Organizations without billing information on file can only create one CockroachDB Basic cluster.
        </Note>

        1. If you haven't already, [sign up for a CockroachDB Cloud account](https://cockroachlabs.cloud/signup?referralId=docs_go_pgx).
        2. [Log in](https://cockroachlabs.cloud/) to your CockroachDB Cloud account.
        3. On the **Clusters** page, click **Create cluster**.
        4. On the **Select a plan** page, select **Basic**.
        5. On the **Cloud & Regions** page, select a cloud provider (GCP or AWS) in the **Cloud provider** section.
        6. In the **Regions** section, select a region for the cluster. Refer to <InternalLink version="cockroachcloud" path="regions">CockroachDB Cloud Regions</InternalLink> for the regions where CockroachDB Basic clusters can be deployed. To create a multi-region cluster, click **Add region** and select additional regions.
        7. Click **Next: Capacity**.
        8. On the **Capacity** page, select **Start for free**. Click **Next: Finalize**.
        9. On the **Finalize** page, click **Create cluster**.

           Your cluster will be created in a few seconds and the **Create SQL user** dialog will display.

        ### Create a SQL user

        The **Create SQL user** dialog allows you to create a new SQL user and password.

        1. Enter a username in the **SQL user** field or use the one provided by default.
        2. Click **Generate & save password**.
        3. Copy the generated password and save it in a secure location.
        4. Click **Next**.

           Currently, all new SQL users are created with admin privileges. For more information and to change the default settings, see <InternalLink version="cockroachcloud" path="managing-access#manage-sql-users-on-a-cluster">Manage SQL users on a cluster</InternalLink>.

        ### Get the connection string

        The **Connect to cluster** dialog shows information about how to connect to your cluster.

        1. Select **General connection string** from the **Select option** dropdown.
        2. Open the **General connection string** section, then copy the connection string provided and save it in a secure location.

           The sample application used in this tutorial uses system CA certificates for server certificate verification, so you can skip the **Download CA Cert** instructions.

        <Note>
          The connection string is pre-populated with your username, password, cluster name, and other details. Your password, in particular, will be provided *only once*. Save it in a secure place (Cockroach Labs recommends a password manager) to connect to your cluster in the future. If you forget your password, you can reset it by going to the **SQL Users** page for the cluster, found at `https://cockroachlabs.cloud/cluster/<CLUSTER ID>/users`.
        </Note>
      </Tab>

      <Tab title="ccloud CLI">
        Follow these steps to create a CockroachDB Basic cluster using the `ccloud` CLI tool.

        <Note>
          The `ccloud` CLI tool is in Preview.
        </Note>

        ### Install `ccloud`

        <Tabs>
          <Tab title="Mac">
            You can install `ccloud` using either Homebrew or by downloading the binary.

            #### Use Homebrew

            1. [Install Homebrew](http://brew.sh/).
            2. Install using the `ccloud` tap:

               ```shell theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
               brew install cockroachdb/tap/ccloud
               ```

            #### Download the binary

            In a terminal, enter the following command to download and extract the `ccloud` binary and add it to your `PATH`:

            ```shell theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
            curl https://binaries.cockroachdb.com/ccloud/ccloud_darwin-amd64_.tar.gz | tar -xJ && cp -i ccloud /usr/local/bin/
            ```

            Use the ARM 64 binary if you have an M-series Mac:

            ```shell theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
            curl https://binaries.cockroachdb.com/ccloud/ccloud_darwin-arm64_.tar.gz | tar -xJ && cp -i ccloud /usr/local/bin/
            ```
          </Tab>

          <Tab title="Linux">
            In a terminal, enter the following command to download and extract the `ccloud` binary and add it to your `PATH`:

            ```shell theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
            curl https://binaries.cockroachdb.com/ccloud/ccloud_linux-amd64_.tar.gz | tar -xz && cp -i ccloud /usr/local/bin/
            ```
          </Tab>

          <Tab title="Windows">
            In a PowerShell window, enter the following command to download and extract the `ccloud` binary and add it to your `PATH`:

            ```shell theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
            $ErrorActionPreference = "Stop"; [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $ProgressPreference = 'SilentlyContinue'; $null = New-Item -Type Directory -Force $env:appdata/ccloud; Invoke-WebRequest -Uri https://binaries.cockroachdb.com/ccloud/ccloud_windows-amd64_.zip -OutFile ccloud.zip; Expand-Archive -Force -Path ccloud.zip; Copy-Item -Force ccloud/ccloud.exe -Destination $env:appdata/ccloud; $Env:PATH += ";$env:appdata/ccloud"; # We recommend adding ";$env:appdata/ccloud" to the Path variable for your system environment. See https://docs.microsoft.com/powershell/module/microsoft.powershell.core/about/about_environment_variables#saving-changes-to-environment-variables for more information.
            ```
          </Tab>
        </Tabs>

        ### Run `ccloud quickstart` to create a new cluster, create a SQL user, and retrieve the connection string.

        The easiest way of getting started with CockroachDB Cloud is to use `ccloud quickstart`. The `ccloud quickstart` command guides you through logging in to CockroachDB Cloud, creating a new CockroachDB Basic cluster, and connecting to the new cluster. Run `ccloud quickstart` and follow the instructions:

        ```shell theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
        ccloud quickstart
        ```

        The `ccloud quickstart` command will open a browser window to log you in to CockroachDB Cloud. If you are new to CockroachDB Cloud, you can register using one of the single sign-on (SSO) options, or create a new account using an email address.

        The `ccloud quickstart` command will prompt you for the cluster name, cloud provider, and cloud provider region, then ask if you want to connect to the cluster. Each prompt has default values that you can select, or change if you want a different option.

        Select **General connection string**, then copy the connection string displayed and save it in a secure location. The connection string is the line starting `postgresql://`.

        ```
        ? How would you like to connect? General connection string
        Retrieving cluster info: succeeded
         Downloading cluster cert to /Users/maxroach/.postgresql/root.crt: succeeded
        postgresql://maxroach:ThisIsNotAGoodPassword@blue-dog-147.6wr.cockroachlabs.cloud:26257/defaultdb?sslmode=verify-full&sslrootcert=%2FUsers%2Fmaxroach%2F.postgresql%2Froot.crt
        ```
      </Tab>
    </Tabs>
  </Tab>

  <Tab title="Use a Local Cluster">
    1. If you haven't already, <InternalLink path="install-cockroachdb">download the CockroachDB binary</InternalLink>.
    2. Run the <InternalLink path="cockroach-start-single-node">`cockroach start-single-node`</InternalLink> command:

       ```shell theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
       $ cockroach start-single-node --advertise-addr 'localhost' --insecure
       ```

       This starts an insecure, single-node cluster.
    3. Take note of the following connection information in the SQL shell welcome text:

       ```
       CockroachDB node starting at 2021-08-30 17:25:30.06524 +0000 UTC (took 4.3s)
       build:               CCL v21.1.6 @ 2021/07/20 15:33:43 (go1.15.11)
       webui:               http://localhost:8080
       sql:                 postgresql://root@localhost:26257?sslmode=disable
       ```

       You'll use the `sql` connection string to connect to the cluster later in this tutorial.

    <Danger>
      The `--insecure` flag used in this tutorial is intended for non-production testing only. To run CockroachDB in production, use a secure cluster instead.
    </Danger>
  </Tab>
</Tabs>

## Step 2. Get the code

Clone the code's GitHub repo:

```shell theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
$ git clone https://github.com/cockroachlabs/example-app-go-pgx/
```

The project has the following directory structure:

```text theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
├── README.md
└── main.go
```

The `main.go` file contains the code for `CREATE TABLE`, `INSERT`, `SELECT`, `UPDATE`, and `DELETE` SQL operations. The file also executes the `main` method of the program.

```go theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
package main

    "context"
    "log"
    "os"

    "github.com/cockroachdb/cockroach-go/v2/crdb/crdbpgxv5"
    "github.com/google/uuid"
    "github.com/jackc/pgx/v5"
)

func initTable(ctx context.Context, tx pgx.Tx) error {
    // Dropping existing table if it exists
    log.Println("Drop existing accounts table if necessary.")
    if _, err := tx.Exec(ctx, "DROP TABLE IF EXISTS accounts"); err != nil {
        return err
    }

    // Create the accounts table
    log.Println("Creating accounts table.")
    if _, err := tx.Exec(ctx,
        "CREATE TABLE accounts (id UUID PRIMARY KEY DEFAULT gen_random_uuid(), balance INT8)"); err != nil {
        return err
    }
    return nil
}

func insertRows(ctx context.Context, tx pgx.Tx, accts [4]uuid.UUID) error {
    // Insert four rows into the "accounts" table.
    log.Println("Creating new rows...")
    if _, err := tx.Exec(ctx,
        "INSERT INTO accounts (id, balance) VALUES ($1, $2), ($3, $4), ($5, $6), ($7, $8)", accts[0], 250, accts[1], 100, accts[2], 500, accts[3], 300); err != nil {
        return err
    }
    return nil
}

func printBalances(conn *pgx.Conn) error {
    rows, err := conn.Query(context.Background(), "SELECT id, balance FROM accounts")
    if err != nil {
        log.Fatal(err)
    }
    defer rows.Close()
    for rows.Next() {
        var id uuid.UUID
        var balance int
        if err := rows.Scan(&id, &balance); err != nil {
            log.Fatal(err)
        }
        log.Printf("%s: %d\n", id, balance)
    }
    return nil
}

func transferFunds(ctx context.Context, tx pgx.Tx, from uuid.UUID, to uuid.UUID, amount int) error {
    // Read the balance.
    var fromBalance int
    if err := tx.QueryRow(ctx,
        "SELECT balance FROM accounts WHERE id = $1", from).Scan(&fromBalance); err != nil {
        return err
    }

    if fromBalance < amount {
        log.Println("insufficient funds")
    }

    // Perform the transfer.
    log.Printf("Transferring funds from account with ID %s to account with ID %s...", from, to)
    if _, err := tx.Exec(ctx,
        "UPDATE accounts SET balance = balance - $1 WHERE id = $2", amount, from); err != nil {
        return err
    }
    if _, err := tx.Exec(ctx,
        "UPDATE accounts SET balance = balance + $1 WHERE id = $2", amount, to); err != nil {
        return err
    }
    return nil
}

func deleteRows(ctx context.Context, tx pgx.Tx, one uuid.UUID, two uuid.UUID) error {
    // Delete two rows into the "accounts" table.
    log.Printf("Deleting rows with IDs %s and %s...", one, two)
    if _, err := tx.Exec(ctx,
        "DELETE FROM accounts WHERE id IN ($1, $2)", one, two); err != nil {
        return err
    }
    return nil
}

func main() {
    // Read in connection string
    config, err := pgx.ParseConfig(os.Getenv("DATABASE_URL"))
    if err != nil {
        log.Fatal(err)
    }
    config.RuntimeParams["application_name"] = "$ docs_simplecrud_gopgx"
    conn, err := pgx.ConnectConfig(context.Background(), config)
    if err != nil {
        log.Fatal(err)
    }
    defer conn.Close(context.Background())

    // Set up table
    err = crdbpgx.ExecuteTx(context.Background(), conn, pgx.TxOptions{}, func(tx pgx.Tx) error {
        return initTable(context.Background(), tx)
    })

    // Insert initial rows
    var accounts [4]uuid.UUID
    for i := 0; i < len(accounts); i++ {
        accounts[i] = uuid.New()
    }

    err = crdbpgx.ExecuteTx(context.Background(), conn, pgx.TxOptions{}, func(tx pgx.Tx) error {
        return insertRows(context.Background(), tx, accounts)
    })
    if err == nil {
        log.Println("New rows created.")
    } else {
        log.Fatal("error: ", err)
    }

    // Print out the balances
    log.Println("Initial balances:")
    printBalances(conn)

    // Run a transfer
    err = crdbpgx.ExecuteTx(context.Background(), conn, pgx.TxOptions{}, func(tx pgx.Tx) error {
        return transferFunds(context.Background(), tx, accounts[2], accounts[1], 100)
    })
    if err == nil {
        log.Println("Transfer successful.")
    } else {
        log.Fatal("error: ", err)
    }

    // Print out the balances
    log.Println("Balances after transfer:")
    printBalances(conn)

    // Delete rows
    err = crdbpgx.ExecuteTx(context.Background(), conn, pgx.TxOptions{}, func(tx pgx.Tx) error {
        return deleteRows(context.Background(), tx, accounts[0], accounts[1])
    })
    if err == nil {
        log.Println("Rows deleted.")
    } else {
        log.Fatal("error: ", err)
    }

    // Print out the balances
    log.Println("Balances after deletion:")
    printBalances(conn)
}
```

<Note>
  CockroachDB may require the <InternalLink path="transactions#transaction-retries">client to retry a transaction</InternalLink> in the case of read/write <InternalLink path="performance-best-practices-overview#transaction-contention">contention</InternalLink>. The [CockroachDB Go client](https://github.com/cockroachdb/cockroach-go) includes a generic **retry function** (`ExecuteTx()`) that runs inside a transaction and retries it as needed. The code sample shows how you can use this function to wrap SQL statements.
</Note>

## Step 3. Initialize the database

1. Navigate to the `example-app-go-pgx` directory:

   ```shell theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
   $ cd example-app-go-pgx
   ```

2. Set the `DATABASE_URL` environment variable to the connection string for your cluster:

   ```shell theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
   export DATABASE_URL="{connection-string}"
   ```

   Where <code>{'{connection-string}'}</code> is the connection string you copied earlier.

3. If you haven't already, <InternalLink path="install-cockroachdb">download the CockroachDB binary</InternalLink>.

4. Run the <InternalLink path="cockroach-start-single-node">`cockroach start-single-node`</InternalLink> command:

   ```shell theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
   $ cockroach start-single-node --advertise-addr 'localhost' --insecure
   ```

   This starts an insecure, single-node cluster.

5. Take note of the following connection information in the SQL shell welcome text:

   ```text theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
   CockroachDB node starting at 2021-08-30 17:25:30.06524 +0000 UTC (took 4.3s)
   build:               CCL v21.1.6 @ 2021/07/20 15:33:43 (go1.15.11)
   webui:               http://localhost:8080
   sql:                 postgresql://root@localhost:26257?sslmode=disable
   ```

   You'll use the `sql` connection string to connect to the cluster later in this tutorial.

<Danger>
  The `--insecure` flag used in this tutorial is intended for non-production testing only. To run CockroachDB in production, use a secure cluster instead.
</Danger>

## Step 2. Get the code

Clone the code's GitHub repo:

```shell theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
$ git clone https://github.com/cockroachlabs/example-app-go-pgx/
```

The project has the following directory structure:

```text theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
├── README.md
└── main.go
```

The `main.go` file contains the code for `CREATE TABLE`, `INSERT`, `SELECT`, `UPDATE`, and `DELETE` SQL operations. The file also executes the `main` method of the program.

```go theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
package main

    "context"
    "log"
    "os"

    "github.com/cockroachdb/cockroach-go/v2/crdb/crdbpgxv5"
    "github.com/google/uuid"
    "github.com/jackc/pgx/v5"
)

func initTable(ctx context.Context, tx pgx.Tx) error {
    // Dropping existing table if it exists
    log.Println("Drop existing accounts table if necessary.")
    if _, err := tx.Exec(ctx, "DROP TABLE IF EXISTS accounts"); err != nil {
        return err
    }

    // Create the accounts table
    log.Println("Creating accounts table.")
    if _, err := tx.Exec(ctx,
        "CREATE TABLE accounts (id UUID PRIMARY KEY DEFAULT gen_random_uuid(), balance INT8)"); err != nil {
        return err
    }
    return nil
}

func insertRows(ctx context.Context, tx pgx.Tx, accts [4]uuid.UUID) error {
    // Insert four rows into the "accounts" table.
    log.Println("Creating new rows...")
    if _, err := tx.Exec(ctx,
        "INSERT INTO accounts (id, balance) VALUES ($1, $2), ($3, $4), ($5, $6), ($7, $8)", accts[0], 250, accts[1], 100, accts[2], 500, accts[3], 300); err != nil {
        return err
    }
    return nil
}

func printBalances(conn *pgx.Conn) error {
    rows, err := conn.Query(context.Background(), "SELECT id, balance FROM accounts")
    if err != nil {
        log.Fatal(err)
    }
    defer rows.Close()
    for rows.Next() {
        var id uuid.UUID
        var balance int
        if err := rows.Scan(&id, &balance); err != nil {
            log.Fatal(err)
        }
        log.Printf("%s: %d\n", id, balance)
    }
    return nil
}

func transferFunds(ctx context.Context, tx pgx.Tx, from uuid.UUID, to uuid.UUID, amount int) error {
    // Read the balance.
    var fromBalance int
    if err := tx.QueryRow(ctx,
        "SELECT balance FROM accounts WHERE id = $1", from).Scan(&fromBalance); err != nil {
        return err
    }

    if fromBalance < amount {
        log.Println("insufficient funds")
    }

    // Perform the transfer.
    log.Printf("Transferring funds from account with ID %s to account with ID %s...", from, to)
    if _, err := tx.Exec(ctx,
        "UPDATE accounts SET balance = balance - $1 WHERE id = $2", amount, from); err != nil {
        return err
    }
    if _, err := tx.Exec(ctx,
        "UPDATE accounts SET balance = balance + $1 WHERE id = $2", amount, to); err != nil {
        return err
    }
    return nil
}

func deleteRows(ctx context.Context, tx pgx.Tx, one uuid.UUID, two uuid.UUID) error {
    // Delete two rows into the "accounts" table.
    log.Printf("Deleting rows with IDs %s and %s...", one, two)
    if _, err := tx.Exec(ctx,
        "DELETE FROM accounts WHERE id IN ($1, $2)", one, two); err != nil {
        return err
    }
    return nil
}

func main() {
    // Read in connection string
    config, err := pgx.ParseConfig(os.Getenv("DATABASE_URL"))
    if err != nil {
        log.Fatal(err)
    }
    config.RuntimeParams["application_name"] = "$ docs_simplecrud_gopgx"
    conn, err := pgx.ConnectConfig(context.Background(), config)
    if err != nil {
        log.Fatal(err)
    }
    defer conn.Close(context.Background())

    // Set up table
    err = crdbpgx.ExecuteTx(context.Background(), conn, pgx.TxOptions{}, func(tx pgx.Tx) error {
        return initTable(context.Background(), tx)
    })

    // Insert initial rows
    var accounts [4]uuid.UUID
    for i := 0; i < len(accounts); i++ {
        accounts[i] = uuid.New()
    }

    err = crdbpgx.ExecuteTx(context.Background(), conn, pgx.TxOptions{}, func(tx pgx.Tx) error {
        return insertRows(context.Background(), tx, accounts)
    })
    if err == nil {
        log.Println("New rows created.")
    } else {
        log.Fatal("error: ", err)
    }

    // Print out the balances
    log.Println("Initial balances:")
    printBalances(conn)

    // Run a transfer
    err = crdbpgx.ExecuteTx(context.Background(), conn, pgx.TxOptions{}, func(tx pgx.Tx) error {
        return transferFunds(context.Background(), tx, accounts[2], accounts[1], 100)
    })
    if err == nil {
        log.Println("Transfer successful.")
    } else {
        log.Fatal("error: ", err)
    }

    // Print out the balances
    log.Println("Balances after transfer:")
    printBalances(conn)

    // Delete rows
    err = crdbpgx.ExecuteTx(context.Background(), conn, pgx.TxOptions{}, func(tx pgx.Tx) error {
        return deleteRows(context.Background(), tx, accounts[0], accounts[1])
    })
    if err == nil {
        log.Println("Rows deleted.")
    } else {
        log.Fatal("error: ", err)
    }

    // Print out the balances
    log.Println("Balances after deletion:")
    printBalances(conn)
}
```

CockroachDB may require the <InternalLink path="transactions#transaction-retries">client to retry a transaction</InternalLink> in the case of read/write <InternalLink path="performance-best-practices-overview#transaction-contention">contention</InternalLink>. The [CockroachDB Go client](https://github.com/cockroachdb/cockroach-go) includes a generic **retry function** (`ExecuteTx()`) that runs inside a transaction and retries it as needed. The code sample shows how you can use this function to wrap SQL statements.

## Step 3. Initialize the database

1. Navigate to the `example-app-go-pgx` directory:

   ```shell theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
   $ cd example-app-go-pgx
   ```
2. Set the `DATABASE_URL` environment variable to the connection string for your cluster:

   ```shell theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
   export DATABASE_URL="postgresql://root@localhost:26257/defaultdb?sslmode=disable"
   ```

## Step 4. Run the code

1. Initialize the module:

   ```shell theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
   $ go mod tidy
   ```
2. Run the code:

   ```shell theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
   $ go run main.go
   ```

   The output should look similar to the following:

   ```text theme={"theme":{"light":"catppuccin-mocha","dark":"catppuccin-mocha"}}
   2023/03/24 13:48:13 Drop existing accounts table if necessary.
   2023/03/24 13:48:13 Creating accounts table.
   2023/03/24 13:48:13 Creating new rows...
   2023/03/24 13:48:13 New rows created.
   2023/03/24 13:48:13 Initial balances:
   2023/03/24 13:48:13 19a2b534-11f6-4bbd-ab50-b94c44479280: 500
   2023/03/24 13:48:13 882bb8be-31cb-4481-8e28-69b0566a322b: 300
   2023/03/24 13:48:13 b8cbefed-37ee-4bae-b5b0-3bcfb7a6d3bf: 250
   2023/03/24 13:48:13 d0a238d5-96bd-42d7-89a3-3e2448b3137b: 100
   2023/03/24 13:48:14 Transferring funds from account with ID 19a2b534-11f6-4bbd-ab50-b94c44479280 to account with ID d0a238d5-96bd-42d7-89a3-3e2448b3137b...
   2023/03/24 13:48:14 Transfer successful.
   2023/03/24 13:48:14 Balances after transfer:
   2023/03/24 13:48:14 19a2b534-11f6-4bbd-ab50-b94c44479280: 400
   2023/03/24 13:48:14 882bb8be-31cb-4481-8e28-69b0566a322b: 300
   2023/03/24 13:48:14 b8cbefed-37ee-4bae-b5b0-3bcfb7a6d3bf: 250
   2023/03/24 13:48:14 d0a238d5-96bd-42d7-89a3-3e2448b3137b: 200
   2023/03/24 13:48:14 Deleting rows with IDs b8cbefed-37ee-4bae-b5b0-3bcfb7a6d3bf and d0a238d5-96bd-42d7-89a3-3e2448b3137b...
   2023/03/24 13:48:14 Rows deleted.
   2023/03/24 13:48:14 Balances after deletion:
   2023/03/24 13:48:14 19a2b534-11f6-4bbd-ab50-b94c44479280: 400
   2023/03/24 13:48:14 882bb8be-31cb-4481-8e28-69b0566a322b: 300
   ```

   As shown in the output, the code does the following:

   * Drops any existing `accounts` table.
   * Creates a new `accounts` table.
   * Inserts some rows into the table.
   * Reads values from the table.
   * Updates values in the table.
   * Deletes values from the table.

## What's next?

Read more about using the [Go pgx driver](https://pkg.go.dev/github.com/jackc/pgx?tab=doc).

You might also be interested in the following pages:

* [Client Connection Parameters](connection-parameters)
* [Connection Pooling](connection-pooling)
* [Data Replication](demo-replication-and-rebalancing)
* [CockroachDB Resilience](demo-cockroachdb-resilience)
* [Replication & Rebalancing](demo-replication-and-rebalancing)
* [Cross-Cloud Migration](demo-automatic-cloud-migration)
* [Automated Operations](orchestrate-a-local-cluster-with-kubernetes-insecure)