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[英]MySQL query to select one table based on values from two different tables.
[英]How to get single row from a query involving two tables. 2 Foreign Keys are repeated in one entry of child table
我有兩張桌子
1. tbl_clubs
2. tbl_match_schedule
tbl_club有字段;
fld_id | fld_club_name
tbl_match_schedule具有字段;
fld_id | fld_club_id_one | fld_club_id_two | fld_match_time.
現在的流程是,管理員將1.轉到添加新的比賽時間表。 2.從下拉菜單1中選擇俱樂部的名稱。3.從下拉菜單2中選擇第二個俱樂部(對陣)的名稱。4.給比賽時間並保存。
現在的問題是我無法正確選擇數據。 我需要一行,但是當我輸入以下查詢時,它會給我兩行
從tbl_match_schedule中將ms.fld_id,ms.fld_id_club_one,ms.fld_id_club_two,ms.fld_match_time,c.fld_club_name,c.fld_id選擇為ms,從tbl_club作為c WHERE c.fld_id = ms.fld_id_club_one = c.fld_id_club_one或c。
請幫助我,我想要這樣的形式: "19:00"
與"club name two"
"club name one"
對"club name two"
"19:00"
我正在使用mysql
如果我正確理解,應該這樣做:
SELECT c1.fld_club_name AS 'club_name_one', c2.fld_club_name AS 'club_name_two', s.fld_match_time AS 'at' FROM tbl_match_schedule s
LEFT JOIN tbl_clubs c1 ON s.fld_club_id_one = c1.fld_id
LEFT JOIN tbl_clubs c2 ON s.fld_club_id_two = c2.fld_id
當然,只要您使用c1.
就可以在此之后添加WHERE
或ORDER
子句以滿足您的進一步需求c1.
和c2.
當您提及俱樂部時,速記員的全名將是模棱兩可的。
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