Go Standard Library Cookbook

How to do it...

1. Run the following SQL script against your sample database:

        DROP TABLE IF EXISTS post;        CREATE TABLE post (          ID serial,          TITLE varchar(40),          CONTENT varchar(255),          CONSTRAINT pk_post PRIMARY KEY(ID)        );        SELECT * FROM post;        INSERT INTO post(ID,TITLE,CONTENT) VALUES                         (1,NULL,'Content One'),                        (2,'Title Two','Content Two');

2. Open the console and create the folder chapter08/recipe08.
3. Navigate to the directory.
4. Create the querymap.go file with the following content:

        package main        import (          "database/sql"          "fmt"          _ "github.com/lib/pq"        )        const selOne = "SELECT id,title,content FROM post                        WHERE ID = $1;"        func main() {          db := createConnection()          defer db.Close()          rows, err := db.Query(selOne, 1)          if err != nil {            panic(err)          } cols, _ := rows.Columns() ...