How to perform a JOIN operation between multiple tables in Go?

To perform a JOIN operation between multiple tables in Go, you can use the SQL package provided by the database driver you are using. Here is an example using the standard SQL package and MySQL driver:

Install the MySQL driver package by running the following command:

go get -u github.com/go-sql-driver/mysql

Import the required packages:

import (
    "database/sql"
    _ "github.com/go-sql-driver/mysql"
)

Note: The _ in the import statement is required to register the MySQL driver.

Establish a connection to the database:

db, err := sql.Open("mysql", "username:password@tcp(localhost:3306)/database_name")
if err != nil {
    // handle error
}
defer db.Close()

Replace username, password, and database_name with your MySQL credentials and database name.

Write the SQL query with the JOIN operation:

query := `
    SELECT t1.column1, t2.column2
    FROM table1 AS t1
    JOIN table2 AS t2 ON t1.id = t2.table1_id
`

Replace column1, column2, table1, table2, and id with the actual column names and table names you want to join on.

Execute the query and retrieve the results:

rows, err := db.Query(query)
if err != nil {
    // handle error
}
defer rows.Close()

for rows.Next() {
    var value1 string
    var value2 int

    err := rows.Scan(&value1, &value2)
    if err != nil {
        // handle error
    }

    // Process the retrieved values
    fmt.Println(value1, value2)
}

if err = rows.Err(); err != nil {
    // handle error
}

Handle any errors that occurred during the query execution or result retrieval.

Remember to customize the code according to your specific database and table structure.