Skip to content

Create 1421 - npv-queries.md #4080

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Jul 30, 2024
Merged

Create 1421 - npv-queries.md #4080

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
80 changes: 80 additions & 0 deletions dsa-solutions/lc-solutions/1400-1499/1421 - npv-queries.md
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,80 @@
---
id: npv-queries
title: 1421. NPV Queries
sidebar_label: 1421 - npv-queries
description: "This is a solution to LeetCode problems 1421."
---

SQL Schema
Table: NPV

+---------------+---------+
| Column Name | Type |
+---------------+---------+
| id | int |
| year | int |
| npv | int |
+---------------+---------+
(id, year) is the primary key of this table.
The table contains information about the id and the year of each inventory and the corresponding net present value.


Table: Queries

+---------------+---------+
| Column Name | Type |
+---------------+---------+
| id | int |
| year | int |
+---------------+---------+
(id, year) is the primary key of this table.
The table contains information about the id and the year of each inventory query.


Write an SQL query to find the npv of each query in the queries table.

Return the result table in any order.

The query result format is as follows:

NPV table:
+------+--------+--------+
| id | year | npv |
+------+--------+--------+
| 1 | 2018 | 100 |
| 7 | 2020 | 30 |
| 13 | 2019 | 40 |
| 1 | 2019 | 113 |
| 2 | 2008 | 121 |
| 3 | 2009 | 12 |
| 11 | 2020 | 99 |
| 7 | 2019 | 0 |
+------+--------+--------+

Queries table:
+------+--------+
| id | year |
+------+--------+
| 1 | 2019 |
| 2 | 2008 |
| 3 | 2009 |
| 7 | 2018 |
| 7 | 2019 |
| 7 | 2020 |
| 13 | 2019 |
+------+--------+

Result table:
+------+--------+--------+
| id | year | npv |
+------+--------+--------+
| 1 | 2019 | 113 |
| 2 | 2008 | 121 |
| 3 | 2009 | 12 |
| 7 | 2018 | 0 |
| 7 | 2019 | 0 |
| 7 | 2020 | 30 |
| 13 | 2019 | 40 |
+------+--------+--------+

The npv value of (7, 2018) is not present in the NPV table, so we consider it as 0. The npv values of all other queries can be found in the NPV table.
Loading