Mysql JOIN (multiple) tables

Question

I have 3 tables. 2 of them are the same (same columns, different data), and the third has some info data about other 2. Database looks like this:

Table 1:

Answer 1

You can use the UNION statement:

(
    SELECT Name, Temperature, Pressure
    FROM Table1 INNER JOIN Table2 ON Table1.Name = Table2.Name
)
UNION
(
    SELECT Name, Temperature, Pressure
    FROM Table1 INNER JOIN Table3 ON Table1.Name = Table3.Name
)

Answer 2

Try union:

SELECT table1.name, temperature, pressure 
FROM table1 inner join table2 ON
table1.name = table2.name
UNION
SELECT table1.name, temperature, pressure 
FROM table1 inner join table3 ON
table1.name = table3.name

Edit: You can make another select from those results, then you can limit, group or order:

SELECT * FROM
(
    SELECT table1.name, temperature, pressure 
    FROM table1 inner join table2 ON
    table1.name = table2.name
    UNION
    SELECT table1.name, temperature, pressure 
    FROM table1 inner join table3 ON
    table1.name = table3.name
) as JoinedTable
LIMIT 0, 1

Edit 2: To have only one row from each table (table 2 and table 3) you can use limit/group by/order by for each query (assuming you have column date):

SELECT table1.name, temperature, pressure 
FROM table1 inner join table2 ON
table1.name = table2.name
ORDER BY date DESC
LIMIT 0, 1
UNION
SELECT table1.name, temperature, pressure 
FROM table1 inner join table3 ON
table1.name = table3.name
ORDER BY date DESC
LIMIT 0, 1