Added Trade Pairs

Author: thecoddiwompler

Trade Pairs/README.md

@@ -0,0 +1,69 @@
+# Restaurant Growth
+![Star Badge](https://img.shields.io/static/v1?label=%F0%9F%8C%9F&message=If%20Useful&style=style=flat&color=BC4E99)
+[![View Main Folder](https://img.shields.io/badge/View-Main_Folder-971901?)](https://github.com/thecoddiwompler/SQL-Practice-Questions/tree/main)
+[![View Repositories](https://img.shields.io/badge/View-My_Repositories-blue?logo=GitHub)](https://github.com/thecoddiwompler?tab=repositories)
+[![View My Profile](https://img.shields.io/badge/View-My_Profile-green?logo=GitHub)](https://github.com/thecoddiwompler)
+
+---
+
+## 🛠️ Problem Statement
+
+  <b>Table Name : Trade_tbl</b>
+
+|  Column Name  |Type |
+| ------------- | ------------- |
+| TRADE_ID   | varchar(20)     |
+| Trade_Timestamp          | time |
+| Trade_Stock    | varchar(20)    |
+| Quantity        | int     |
+| Price | Float |
+
+<b>trade_id is the primary key for this table.</b> </br>
+This table contains data about trading of Stocks at some exchange.  </br>
+</br>
+
+Write a SQL to find trade couples satisfying the following conditions for each stock :
+
+1. The trades should be within 10 seconds of window 
+2. The prices difference between the trades should be more than 10%
+</br>
+
+The query result format is in the following example:  
+
+ <details>
+<summary>
+Input
+</summary>
+ </br>
+
+ <b>Table Name: Trade_tbl</b>
+
+| TRADE_ID | Trade_Timestamp | Trade_Stock      | Quantity | Price |
+|----------|-----------------|------------------|----------|-------|
+| TRADE1   | 10:01:05        | ITJunction4All   | 100      | 20.0  |
+| TRADE2   | 10:01:06        | ITJunction4All   | 20       | 15.0  |
+| TRADE3   | 10:01:08        | ITJunction4All   | 150      | 30.0  |
+| TRADE4   | 10:01:09        | ITJunction4All   | 300      | 32.0  |
+| TRADE5   | 10:10:00        | ITJunction4All   | -100     | 19.0  |
+| TRADE6   | 10:10:01        | ITJunction4All   | -300     | 19.0  |
+
+
+</details>
+
+<details>
+<summary>
+Output
+</summary>
+</br>
+  
+| tradeid1 | tradeid2 | price_difference |
+|----------|----------|------------------|
+| TRADE2   | TRADE1   | 25             |
+| TRADE3   | TRADE1   | 50             |
+| TRADE3   | TRADE2   | 100             |
+| TRADE4   | TRADE1   | 60|
+| TRADE4   | TRADE2   | 113.3333              |
+
+</details>
+
+---

Trade Pairs/schema.sql

@@ -0,0 +1,39 @@
+CREATE TABLE Trade_tbl(
+    TRADE_ID varchar(20),
+    Trade_Timestamp time,
+    Trade_Stock varchar(20),
+    Quantity int,
+    Price Float
+);
+
+INSERT INTO
+    Trade_tbl
+VALUES
+    ('TRADE1', '10:01:05', 'ITJunction4All', 100, 20);
+
+INSERT INTO
+    Trade_tbl
+VALUES
+    ('TRADE2', '10:01:06', 'ITJunction4All', 20, 15);
+
+INSERT INTO
+    Trade_tbl
+VALUES
+    ('TRADE3', '10:01:08', 'ITJunction4All', 150, 30);
+
+INSERT INTO
+    Trade_tbl
+VALUES
+    ('TRADE4', '10:01:09', 'ITJunction4All', 300, 32);
+
+INSERT INTO
+    Trade_tbl
+VALUES
+    ('TRADE5', '10:10:00', 'ITJunction4All', -100, 19);
+
+INSERT INTO
+    Trade_tbl
+VALUES
+    ('TRADE6', '10:10:01', 'ITJunction4All', -300, 19);
+
+COMMIT;

Trade Pairs/solution.sql

@@ -0,0 +1,18 @@
+WITH cte AS(
+    SELECT
+        a.trade_id tradeid1,
+        b.trade_id tradeid2,
+        ABS((a.price - b.price) * 100 / b.price) price_difference
+    FROM
+        trade_tbl a
+        INNER JOIN trade_tbl b ON (a.trade_timestamp - INTERVAL '10' SECOND) <= b.trade_timestamp
+        AND a.trade_timestamp > b.trade_timestamp
+        AND (
+            a.price * 1.1 <= b.price
+            OR a.price * 0.9 >= b.price
+        )
+)
+SELECT
+    *
+FROM
+    cte;