From 0539167736a03e07e52130df612f8dc2ccf028c7 Mon Sep 17 00:00:00 2001
From: Pragati Verma <itispragativerma@gmail.com>
Date: Tue, 24 Dec 2024 20:32:44 +0530
Subject: [PATCH] [Term Entry] SQL Operators: UPDATE

* Add sql update entry

* Update update.md

* Fix lint errors

* Minor changes

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 .../concepts/operators/terms/update/update.md | 55 +++++++++++++++++++
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+---
+Title: 'UPDATE'
+Description: 'Modifies existing records in a table according to specified conditions.'
+Subjects:
+  - 'Data Science'
+  - 'Computer Science'
+Tags:
+  - 'Database'
+  - 'Queries'
+  - 'PostgreSQL'
+  - 'MySQL'
+CatalogContent:
+  - 'learn-sql'
+  - 'paths/analyze-data-with-sql'
+---
+
+The **`UPDATE`** statement in SQL is used to modify existing records in a table. This powerful **Data Manipulation Language (DML)** command allows developers to update one or multiple rows simultaneously.
+
+## Syntax
+
+```pseudo
+UPDATE table_name
+SET column1 = value1, column2 = value2, ...
+WHERE condition;
+```
+
+- `table_name`: The name of the table containing the data to be updated.
+- `SET`: Specifies the columns to update and their new values.
+- `condition`: An optional clause that specifies which rows to update. If omitted, all rows in the table are updated.
+
+## Example
+
+Let's say there's a table `Employees`:
+
+| ID  | Name  | Department | Salary |
+| --- | ----- | ---------- | ------ |
+| 1   | John  | HR         | 50000  |
+| 2   | Alice | IT         | 60000  |
+| 3   | Bob   | Sales      | 45000  |
+
+To update Bob's salary in the Sales department, the following query can be used:
+
+```sql
+UPDATE Employees
+SET Salary = 47000
+WHERE Name = 'Bob' AND Department = 'Sales';
+```
+
+Now, the updated table will be as follows:
+
+| ID  | Name  | Department | Salary |
+| --- | ----- | ---------- | ------ |
+| 1   | John  | HR         | 50000  |
+| 2   | Alice | IT         | 60000  |
+| 3   | Bob   | Sales      | 47000  |