How to update records in an SQL database using Go?

To update records in an SQL database using Go, you will need to perform the following steps:

Import the required packages: Import the required packages for working with SQL databases and executing SQL statements using Go's database/sql package.

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

Establish a database connection: Open a connection to the desired SQL database using the appropriate driver and connection string. In this example, we will use the mysql driver and connect to a MySQL database.

db, err := sql.Open("mysql", "username:password@tcp(hostname:port)/database")
if err != nil {
    log.Fatal(err)
}
defer db.Close()

Prepare the SQL statement: Using the Prepare method of the database connection, prepare the SQL statement for updating records. Ensure to include the necessary placeholders (?) for parameterized queries.

stmt, err := db.Prepare("UPDATE tablename SET column1=?, column2=? WHERE condition_column=?")
if err != nil {
    log.Fatal(err)
}
defer stmt.Close()

Execute the SQL statement: Execute the prepared statement by passing the required values for the placeholders.

result, err := stmt.Exec(value1, value2, conditionValue)
if err != nil {
    log.Fatal(err)
}

Check the execution result: Verify if the update operation was successful by inspecting the Result object. You can check the number of affected rows using the RowsAffected method.

affectedRows, err := result.RowsAffected()
if err != nil {
    log.Fatal(err)
}
fmt.Printf("Number of affected rows: %d\n", affectedRows)

Here's the complete example of updating records in an SQL database with Go:

package main

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

func main() {
    db, err := sql.Open("mysql", "username:password@tcp(hostname:port)/database")
    if err != nil {
        log.Fatal(err)
    }
    defer db.Close()

    stmt, err := db.Prepare("UPDATE tablename SET column1=?, column2=? WHERE condition_column=?")
    if err != nil {
        log.Fatal(err)
    }
    defer stmt.Close()

    result, err := stmt.Exec(value1, value2, conditionValue)
    if err != nil {
        log.Fatal(err)
    }

    affectedRows, err := result.RowsAffected()
    if err != nil {
        log.Fatal(err)
    }
    fmt.Printf("Number of affected rows: %d\n", affectedRows)
}

Remember to replace username, password, hostname, port, database, tablename, column1, column2, and condition_column with your corresponding values specific to your database setup. Also, provide the appropriate values for value1, value2, and conditionValue based on your requirements.