mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
synced 2025-11-04 03:33:12 +08:00
70 lines
2.3 KiB
HTML
70 lines
2.3 KiB
HTML
<p>Table: <code>Person</code></p>
|
|
|
|
<pre>
|
|
+-------------+---------+
|
|
| Column Name | Type |
|
|
+-------------+---------+
|
|
| personId | int |
|
|
| lastName | varchar |
|
|
| firstName | varchar |
|
|
+-------------+---------+
|
|
personId is the primary key column for this table.
|
|
This table contains information about the ID of some persons and their first and last names.
|
|
</pre>
|
|
|
|
<p> </p>
|
|
|
|
<p>Table: <code>Address</code></p>
|
|
|
|
<pre>
|
|
+-------------+---------+
|
|
| Column Name | Type |
|
|
+-------------+---------+
|
|
| addressId | int |
|
|
| personId | int |
|
|
| city | varchar |
|
|
| state | varchar |
|
|
+-------------+---------+
|
|
addressId is the primary key column for this table.
|
|
Each row of this table contains information about the city and state of one person with ID = PersonId.
|
|
</pre>
|
|
|
|
<p> </p>
|
|
|
|
<p>Write an SQL query to report the first name, last name, city, and state of each person in the <code>Person</code> table. If the address of a <code>personId</code> is not present in the <code>Address</code> table, report <code>null</code> instead.</p>
|
|
|
|
<p>Return the result table in <strong>any order</strong>.</p>
|
|
|
|
<p>The query result format is in the following example.</p>
|
|
|
|
<p> </p>
|
|
<p><strong>Example 1:</strong></p>
|
|
|
|
<pre>
|
|
<strong>Input:</strong>
|
|
Person table:
|
|
+----------+----------+-----------+
|
|
| personId | lastName | firstName |
|
|
+----------+----------+-----------+
|
|
| 1 | Wang | Allen |
|
|
| 2 | Alice | Bob |
|
|
+----------+----------+-----------+
|
|
Address table:
|
|
+-----------+----------+---------------+------------+
|
|
| addressId | personId | city | state |
|
|
+-----------+----------+---------------+------------+
|
|
| 1 | 2 | New York City | New York |
|
|
| 2 | 3 | Leetcode | California |
|
|
+-----------+----------+---------------+------------+
|
|
<strong>Output:</strong>
|
|
+-----------+----------+---------------+----------+
|
|
| firstName | lastName | city | state |
|
|
+-----------+----------+---------------+----------+
|
|
| Allen | Wang | Null | Null |
|
|
| Bob | Alice | New York City | New York |
|
|
+-----------+----------+---------------+----------+
|
|
<strong>Explanation:</strong>
|
|
There is no address in the address table for the personId = 1 so we return null in their city and state.
|
|
addressId = 1 contains information about the address of personId = 2.
|
|
</pre>
|