concat.md

📚 CONCAT

The CONCAT function is used in SQL to join two or more strings into a single string.
It is commonly used to combine columns or add text into results.

---

🛠️ Basic Syntax

SELECT CONCAT(string1, string2, ...) AS combined_column
FROM table_name;

• CONCAT joins multiple strings or columns into one.
• The result is returned as a single string.

Example

SELECT CONCAT(first_name, ' ', last_name) AS full_name
FROM employees;

• This query combines first_name and last_name with a space in between to create a full_name.

Key Points

• If any argument is NULL, the result will also be NULL (unless using CONCAT_WS() in some databases).
• Use single quotes ' ' to add spaces, commas, or other separators.
• Some databases also have CONCAT_WS(separator, string1, string2, ...) to specify a separator automatically.

Additional Example

SELECT CONCAT(city, ', ', state) AS location
FROM customers;

• This query combines city and state into a single location string separated by a comma and space.

---

🎥 Video Notes

---

📝 Problem Description

Describe the problem, challenge, or topic discussed in a video related to SELECT FROM.
What concept was explained or what exercise was solved?

---

DataBase Given

---

💻 My SQL Code

-- Write your SQL code attempt or solution related to SQL COMMAND
SQL COMMAND

---

🧠 Solution Code / Explanation

SQL COMMAND

Explanation - Explain what you learned, any key takeaways, or how you solved the problem related to COMMAND._

---

⬅️ Previous: DATA TYPES Next ➡️ CAST