Re: join 4 tables
Read about Join in SQL primers and in the MySQL manual.
To build a query like that ...
1 Build the From clause ...
from a
join b on a.poiref=b.pdref
join c on a.poictry=c.ctryid
join d on b.pdmp=d.mpid
2 Add Select expressions to the front ...
select a...., b...., c...., d....
3 Add where clause(s) if desired
Edited 1 time(s). Last edit at 05/19/2020 02:15PM by Peter Brawley.
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Re: join 4 tables
May 19, 2020 12:43PM
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