Basic explanation of Go connection database operation

introduction

Go language is loved by developers because of its concurrency mechanism and excellent performance. In actual development, we often need to perform database operations. So, for GO, how are database operations implemented? This article will parse for you how Go performs database operations. We will take the most commonly used MySQL database as an example, starting from connecting to the database and expanding one by one.

Connect to the database

Import package

In Go, we usedatabase/sqlA package performs database operations, which provides a set of generalized interfaces for SQL (or SQL-like) databases. This package does not provide specific database drivers, but defines some interfaces, and the database driver needs to implement these interfaces. Therefore, first we need to install the corresponding MySQL driver:

go get /go-sql-driver/mysql

Then we import these two packages in the code:

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

Why use it in import_Woolen cloth? This is because in Go, if a package is imported but not used, an error will be reported. We only use/go-sql-driver/mysqlCome to achievedatabase/sqlThe interface in, but we did not use it directly, so we use_。

Create a connection

use()Function creates a database connection:

db, err := ("mysql", "user:password@tcp(localhost:3306)/dbname?charset=utf8")

After the database connection is established, a ping operation is required to check whether the database connection is normal.

err = ()

Database operations

Query operation

Query operation, we use()Functions, for example:

rows, err := ("SELECT * FROM users")

Insert operation

Insert operation, we use()Functions, for example:

result, err := ("INSERT INTO users(name) values('test_user')")

Summarize

Although Go provides relatively low-level interfaces to SQL and has relatively complex operations, its concurrency performance is strong and has high security, and is suitable for building services with high performance requirements. At the same time, the design with SQL interface also provides great convenience for realizing database driver flexibility.

The above is the detailed content of the basic explanation of Go connection database operation. For more information about Go database operation, please pay attention to my other related articles!