How to do a FULL OUTER JOIN in MySQL?

Question

How to do a FULL OUTER JOIN in MySQL?

I need to do a Full Outer Join in MySQL. Is this conceivable? Is a Full Outer Join upheld by MySQL?

join mysql sql

4 years ago by Amit8z4mc

2 Answers

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**espadacoder11** · Answer 1 · 2021-05-20T09:30:10

You don't have FULL JOINS on MySQL, but you can sure emulate them.

For a code SAMPLE transcribed from this SO question you have:

with two tables t1, t2:



SELECT  FROM t1

LEFT JOIN t2 ON t1.id = t2.id

UNION

SELECT  FROM t1

RIGHT JOIN t2 ON t1.id = t2.id

**RoliMishra** · Answer 2 · 2021-05-21T12:59:05

You can also try this:

select 

    t1.value, t2.value

from t1 

left outer join t2  

  on t1.value = t2.value

union all      

select 

    t1.value, t2.value

from t2 

left outer join t1 

  on t1.value = t2.value

where 

    t1.value IS NULL

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How to do a FULL OUTER JOIN in MySQL?

2 Answers

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