1、Install the Mysql Connect plugin

https://www.unrealengine.com/marketplace/zh-CN/product/c15f4e325ba04d5698395414af94644f

2、Use plugins

Features:

Support local MYSQL server and cloud database connection (eg: Azure Database for MySQL)

Support C++ or pure blueprint calls

Synchronous and asynchronous support

Support MYSQL 5.x.x - 8.x.x series

used in C++

#include "MysqlConnectManager.h"
#include "MysqlResult.h"

UMysqlConnectManager* Mysql;
UMysqlResult* Results;

Mysql = UMysqlConnectManager::CreateMysqlConnectManager();
Results = NewObject<UMysqlResult>();

/////////////////////////// synchronous connection example ///////////////////////////////

Mysql->Connect("127.0.0.1", 3306, "username", "pw", "TableName", Results);
if (!Results->IsSucceed)
{
	UE_LOG(LogTemp, Warning, TEXT("MYSQL: ConnectError: %s"), *Results->Msg);
	return;
}

//Get the total number of rows
Mysql->Query("SELECT count(1) FROM `testtable`", Results);
UE_LOG(LogTemp, Warning, TEXT("MYSQL: Count: IsSucceed = %d, msg = %s, count = %d"), Results->IsSucceed, *Results->Msg, Results->getCount());

//get row
Mysql->Query("SELECT * FROM `testtable`", Results);
UE_LOG(LogTemp, Warning, TEXT("MYSQL: rows: IsSucceed = %d, msg = %s, Num = %d"), Results->IsSucceed, *Results->Msg, Results->getRows().Num());

/////////////////////////// Asynchronous connection example ///////////////////////////////

#include "MysqlConnectManager.h"
#include "MysqlResult.h"

UMysqlConnectManager* Mysql;
UMysqlResult* Results;

Mysql = UMysqlConnectSubsystem::Get();
Results = NewObject<UMysqlResult>();

const FLatentActionInfo LatentInfo(0, FMath::Rand(), TEXT("ConnectCallback"), this);
Mysql->AConnect("127.0.0.1", 3306, "username", "pw", "TableName", Results, this, LatentInfo);

//Asynchronous callback function
void APluginProjectGameModeBase::ConnectCallback()
{
    if (!Results->IsSucceed)
    {
        UE_LOG(LogTemp, Warning, TEXT("MYSQL: ConnectError: %s"), *Results->Msg);
        return;
    }

    //Get the total number of rows
    const FLatentActionInfo LatentInfo(0, FMath::Rand(), TEXT("fetch_count_Callback"), this);
    Mysql->AQuery("SELECT count(1) FROM `testtable`", Results, this, LatentInfo);
}

//Asynchronous callback function
void APluginProjectGameModeBase::fetch_count_Callback()
{
    UE_LOG(LogTemp, Warning, TEXT("MYSQL: Count: IsSucceed = %d, msg = %s, count = %d"), Results->IsSucceed, *Results->Msg, Results->getCount());

    //get row
    const FLatentActionInfo LatentInfo(0, FMath::Rand(), TEXT("fetch_rows_Callback"), this);
    Mysql->AQuery("SELECT * FROM `testtable`", Results, this, LatentInfo);
}

//Asynchronous callback function
void APluginProjectGameModeBase::fetch_rows_Callback()
{
    UE_LOG(LogTemp, Warning, TEXT("MYSQL: rows: IsSucceed = %d, msg = %s, Num = %d"), Results->IsSucceed, *Results->Msg, Results->getRows().Num());
}