如何使用typeorm在NestJS框架上执行原始SQL查询

npm install typeorm mysql

{
  "type": "mysql",
  "host": "localhost",
  "port": 3306,
  "username": "your_username",
  "password": "your_password",
  "database": "your_database",
  "entities": ["dist/**/*.entity{.ts,.js}"],
  "synchronize": true
}

import { Injectable } from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';
import { Repository } from 'typeorm';

@Injectable()
export class DatabaseService {
  constructor(
    @InjectRepository(EntityName) private readonly repository: Repository<EntityName>,
  ) {}

  async executeRawQuery(query: string): Promise<any> {
    return await this.repository.query(query);
  }
}

import { Controller, Get } from '@nestjs/common';
import { DatabaseService } from './database.service';

@Controller('example')
export class ExampleController {
  constructor(private readonly databaseService: DatabaseService) {}

  @Get()
  async executeQuery(): Promise<any> {
    const query = 'SELECT * FROM table_name';
    return await this.databaseService.executeRawQuery(query);
  }
}