# 组合两个表

<p>表1: <code>Person</code></p>

<pre>+-------------+---------+
| 列名         | 类型     |
+-------------+---------+
| PersonId    | int     |
| FirstName   | varchar |
| LastName    | varchar |
+-------------+---------+
PersonId 是上表主键
</pre>

<p>表2: <code>Address</code></p>

<pre>+-------------+---------+
| 列名         | 类型    |
+-------------+---------+
| AddressId   | int     |
| PersonId    | int     |
| City        | varchar |
| State       | varchar |
+-------------+---------+
AddressId 是上表主键
</pre>

<p>&nbsp;</p>

<p>编写一个 SQL 查询，满足条件：无论 person 是否有地址信息，都需要基于上述两表提供&nbsp;person 的以下信息：</p>

<p>&nbsp;</p>

<pre>FirstName, LastName, City, State
</pre>

<p>以下错误的选项是？</p>

## aop

### before

```cpp

```
### after

```cpp

```

## 答案

```cpp

```

## 选项


### A

```cpp

```

### B

```cpp

```

### C

```cpp

```
