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存量题库数据更新

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2023-12-09 18:42:21 +08:00
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@@ -9,21 +9,21 @@
| event_date | date |
| games_played | int |
+--------------+---------+
(player_id, event_date) is the primary key of this table.
(player_id, event_date) is the primary key (combination of columns with unique values) of this table.
This table shows the activity of players of some games.
Each row is a record of a player who logged in and played a number of games (possibly 0) before logging out on someday using some device.
</pre>
<p>&nbsp;</p>
<p>Write an SQL query to report the <strong>first login date</strong> for each player.</p>
<p>Write a solution to find the <strong>first login date</strong> for each player.</p>
<p>Return the result table in <strong>any order</strong>.</p>
<p>The query result format is in the following example.</p>
<p>The result format is in the following example.</p>
<p>&nbsp;</p>
<p><strong>Example 1:</strong></p>
<p><strong class="example">Example 1:</strong></p>
<pre>
<strong>Input:</strong>