Question

I have a table1 (records 3), and table2 (records 3).

• Where i have field name in both.
• Now i want to make a result from those two table
• which will show me both table records and take only one if there is duplicate.
• from that result i will do main query using like or or other logical statements
• So my expected output records will contain 5 rows not 6 rows. How do i do that?

Example:

table1:                       table2:

+-------------------------+   +--------------------------------+
| Name            | ID        | Name            | ID
+--------------------------   +---------------------------------
| A               |  1        | 1 December Name | 4
| B               |  2        | D               | 5
| 1 December Name |  3        | E               | 6


My Expected output is following which works, but does not work when i use WHERE
like to only get '1 December Name':

+-----------------------------------------------------+
| Name               | ID                
+-----------------------------------------------------
| A                  | 1 table1
| B                  | 2 table1
| 1 December Name    | 3 table2 or table1 (no unique)
| D                  | 4 table2
| E                  | 5 table2

I tried this:

SELECT * FROM 
(
    ( 
     SELECT name AS name FROM table1 
    ) 
UNION 
    ( 
     SELECT anothername AS name FROM table2 
    )
) as t
WHERE name like '%1 December Name%'
    limit 1,10

Output: Your SQL query has been executed successfully ( Query took 0.2798 sec )

Problem: The following query has no error but it does not find that record which contain ‘1 December Name’

Follow up: works i know now which ID it used

SELECT NAME, ID, STATUS FROM 
(
 (
   SELECT NAME AS name       , id, CONCAT('table1')   AS STATUS FROM table1
 )
UNION ALL
 (
   SELECT ANOTHERNAME AS name, id, CONCAT( 'table2' ) AS STATUS FROM table2
 )
) AS t

WHERE 

 t.NAME LIKE '%1 December Name%'

LIMIT 1 , 10;

Answer 1

You can get something similar to what you want:

select name, group_concat(id) from
(select name, 'table1' as id from table1
union all 
select name, 'table2' from table2) x
group by name

Output would be:

+------------------------------------+
| Name               | ID                
--------------------------------------
| A                  | table1
| B                  | table1
| 1 December Name    | table1,table2
| D                  | table2
| E                  | table2

UNION ALL is the right choice (not UNION), because it does not remove duplicates, and preserves row order