mysql FULL JOIN keyword
Translation results:
full
English [fʊl] American [fʊl]
adj. Full, filled; complete, complete; rich; detailed
adv. Extremely, extremely; fully, completely; completely; directly
n.entirely; completely; fully, completely; at its peak
v. Sewing clothes to make them wider; sewing pleats into skirts; [printing] steaming, rinsing
Comparative: fuller Superlative: fullest
join
英[dʒɔɪn] US[dʒɔɪn]
vt.& vi.Join; participate; connect; connect
vt.Participate; combine; get on (train, plane, etc.); get on ( Road)
n. connection; combination; joint; joint point
Third person singular: joins Present participle: joining Past tense: joined Past participle: joined
mysql FULL JOIN keywordsyntax
Function: As long as there is a match in one of the tables, the FULL JOIN keyword will return rows.
Syntax: SELECT column_name(s) FROM table_name1 FULL JOIN table_name2 ON table_name1.column_name=table_name2.column_name
Comments: In some databases , FULL JOIN is called FULL OUTER JOIN.
mysql FULL JOIN keywordexample
//列出所有的人,以及他们的定单,以及所有的定单,以及定购它们的人 SELECT Persons.LastName, Persons.FirstName, Orders.OrderNo FROM Persons FULL JOIN Orders ON Persons.Id_P=Orders.Id_P ORDER BY Persons.LastName;
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