Need help writing a SQL statement - mysql

Question

I need help writing a SQL statement that will create a SQL view from two different tables that will capture 2 records from each possibility.
For example, if there are three records in the customer table that match GROUP A and STATE of NV, you should only show 2 of the 3 records in the view-but if a customer is in GROUP A and STATE of PA or GROUP B and STATE of NV, those additional records will also need to be captured in the view.
I am new to SQL. None of my ideas have worked, so I appreciate any feedback that will help me solve the problem. The following query is what I managed to write:
SELECT customer_table.Customer_ID,
customer_table.First_Name,
customer_table.Last_Name,
customer_table.Email_Address,
customer_table.STATE,
customer_table.GROUP_,
customer_table.Timestamp_,
product_table.Prod_Name,
product_table.Prod_desc
FROM customer_table
INNER JOIN product_table ON customer_table.Customer_ID = product_table.Customer_ID
ORDER BY customer_table.STATE,
customer_table.GROUP_;
And here is the view that it generates:
+-------------+------------+-----------+--------------------+-------+--------+---------------------+----------------+----------------+
| Customer_ID | First_Name | Last_Name | Email_Address | State | GROUP_ | Timestamp_ | Prod_Name | Prod_desc |
+-------------+------------+-----------+--------------------+-------+--------+---------------------+----------------+----------------+
| 4 | Leon | Durham | ldurham#cubs.com | CA | A | 2016-01-25 03:04:22 | Baseball glove | Rawlings glove |
| 1 | Bob | Dernier | bdernier#cubs.com | IL | A | 2016-01-25 02:58:45 | Baseball glove | Rawlings glove |
| 2 | Ryan | Sandberg | rsandberg#cubs.com | IL | A | 2016-01-25 03:02:27 | Baseball glove | Rawlings glove |
| 1 | Bob | Dernier | bdernier#cubs.com | IL | A | 2016-01-25 02:58:45 | Jersey | Chicago jersey |
| 5 | Kieth | Moreland | kmoreland#cubs.com | IL | A | 2016-01-25 03:05:52 | Baseball glove | Rawlings glove |
| 1 | Bob | Dernier | bdernier#cubs.com | IL | A | 2016-01-25 02:58:45 | Hat | Cubs hat |
| 7 | Ron | Cey | rcey#cubs.com | YN | B | 2016-01-25 03:07:53 | Baseball glove | Rawlings glove |
| 6 | Jody | Davis | jdavis#cubs.com | YN | B | 2016-01-25 03:07:08 | Baseball glove | Rawlings glove |
+-------------+------------+-----------+--------------------+-------+--------+---------------------+----------------+----------------+

Answer 1

I believe your best bet is a UNION query. This will stack the results of two seperate SELECT statements on top of each other. Furthermore, you can filter the two queries using a WHERE clause. The second one will be a bit trickier since you have two conditions, so we'll use an OR to seperate them.
/* First SELECT finds two records in Nevada for Group A*/
SELECT TOP 2
customer_table.Customer_ID,
customer_table.First_Name,
customer_table.Last_Name,
customer_table.Email_Address,
customer_table.STATE,
customer_table.GROUP_,
customer_table.Timestamp_,
product_table.Prod_Name,
product_table.Prod_desc
FROM customer_table
INNER JOIN product_table ON customer_table.Customer_ID = product_table.Customer_ID
WHERE customer_Table.GROUP_ = 'A' AND customer_table.STATE = 'NV'
/*UNION ALL will stack the results of these two queries into a single result set*/
UNION ALL
/*Second SELECT finds all records for PA, GROUP A and NV, GROUP B*/
SELECT
customer_table.Customer_ID,
customer_table.First_Name,
customer_table.Last_Name,
customer_table.Email_Address,
customer_table.STATE,
customer_table.GROUP_,
customer_table.Timestamp_,
product_table.Prod_Name,
product_table.Prod_desc
FROM customer_table
INNER JOIN product_table ON customer_table.Customer_ID = product_table.Customer_ID
WHERE (customer_table.GROUP_ = 'A' AND customer_Table.STATE = 'PA') OR
(customer_table.GROUP_ = 'B' AND customer_table.STATE = 'NV')
Lastly, that TOP 2 is SQL Server syntax to say "Return only the top two records for this result set" if this is MYSQL then take out the TOP 2 and stick LIMIT 2 at the end of that SELECT statement instead.