WHERE LIKE子句中的SELECT

Question

so I have 2 tables country_codes and Database. I need to retrive all columns from the database if the country code exist on the table country codes. For example, I have 123 on my country codes table, I need to select all columns if the Phone_Number Column's first 3 digit is 123. So I will select the number 1234567.

Table Name : Country_Codes

+---------------+
|Country_Code   |
+---------------+
|   123         |
|   456         |
|   556         |
|   231         |
+---------------+

Table Name : Database

+---------------+--------+
|Phone_Number   | Used   |
+---------------+--------+
|   1234567     |  No    |
|   4568823     |  No    |
|   5562143     |  No    |
|   5582143     |  No    |
|   2319042     |  No    |
+---------------+--------+

The Result that I want is

Table Name : Database

+---------------+--------+
|Phone_Number   | Used   |
+---------------+--------+
|   1234567     |  No    |
|   4568823     |  No    |
|   5562143     |  No    |
|   2319042     |  No    |
+---------------+--------+

I have tried using

SELECT * FROM database 
WHERE database.phone_number LIKE (SELECT country_code FROM country_codes);

But I keep on getting an error.

Answer 1

Before post the solution, some considerations:

1. Don't call a table with name DATABASE
2. You can normalized better your structure, you can add a foreign key in the DATABASE table about country_code

Try this:

SELECT d.*
FROM database d
JOIN Country_Codes cc
    ON cc.Country_Code like concat(d.Phone_Number, '%')

Answer 2

Use exists and left keywords and get the result : 

CREATE TABLE #Country_Codes(Country_Code VARCHAR(100))
INSERT INTO #Country_Codes(Country_Code)
SELECT 123 UNION ALL
SELECT 456 UNION ALL
SELECT 556 UNION ALL
SELECT 231 

CREATE TABLE #Country_Database(Phone_Number VARCHAR(100), Used VARCHAR(100))
INSERT INTO #Country_Database(Phone_Number , Used)
SELECT '1234567','No' UNION ALL
SELECT '4568823','No' UNION ALL
SELECT '5562143','No' UNION ALL
SELECT '5582143','No' UNION ALL
SELECT '2319042','No' 

SELECT Phone_Number,Used
FROM #Country_Database
WHERE EXISTS(SELECT 1 FROM #Country_Codes WHERE Country_Code =     
LEFT(Phone_Number,3))