Oracle声明变量并在另一个选择查询中使用它

Question

oracle / toad新手。

我正在定义一个变量并将其值从select插入。设置其值后，我将其用于另一个select语句。但是这给了我错误，并且在这个SELECT

中期望INTO子句

Refs

Answer 1

也许您正在搜索Implicit Statement Results in Oracle Database 12c Release 1：

import { JwtService } from './jwt.service';
import { Injectable } from '@angular/core';
import { ApiService } from './api.service';
import { UserService } from './user.service';

@Injectable()
export class AuthService {

  user: any;
  isLoggedIn: boolean = false;

  constructor(
    private apiService: ApiService,
    private jwtService: JwtService,
    private userService: UserService) {
  }

  login(credentials) {

    let endpoint = 'auth/'

    return this.apiService.post(endpoint, credentials)
      .map(res => {
        this.jwtService.saveToken(res.data.jwtToken);
        window.localStorage.setItem('user_id', res.data.user._id);
        this.user = res.data;
        this.isLoggedIn = true;
      });
  }

  logout() {

  }

  isAuthenticated(): boolean {return this.isLoggedIn};

}