mysql - NULL value on LEFT JOIN operation -


consider 2 tables:

•   draft_procedures •   incoterms

table draft_procedures has column

1.  incoterm

table incoterm has column

 1. incotermunique  2. incoterm_desc

im trying join 2 tables in order incoterm_desc (description) incoterm table of draft_procedures incoterm.

when use following query c3incoterm_desc null value

select drp.incoterm, c3.incoterm_desc c3incoterm_desc draft_procedures drp left join incoterms c3 on drp.incoterm = c3.incotermunique

left outer join: per definition,left outer join retrieves rows tablea (draft_procedures) matching records tableb (incoterms) if record tablea (left), there no matching records tableb (right), corresponding (right) columns contain nulls.

select * tablea left outer join tableb on tablea.name = tableb.name;


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