sql - Combining output of two or more select statement -

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how combine output of 2 or more select statements, have multiple tables having data need fetch them write multiple select query. want combine result of queries need ? want output be: 

t1.qty,t2.qty,t3.qty

one option be:

select (select sum(qty) table1 ...),        (select sum(qty) table2 ...),        (select sum(qty) table3 ...)

another joining, provided there link:

select *    (select id,sum(qty) table1 group id) t1        join (select id,sum(qty) table2 group id) t2            on t1.id = t2.id        join (select id,sum(qty) table3 group id) t3            on t1.id = t3.id

the above options display results in 1 row.

you may need union combine rows:

select qty table1 union select qty table2 union select qty table3

much more options if define more specific needs


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