更新查詢從2表

Question

我有以下2個表：

table1中是tracsName,tracsid,N,NE...表2是Tracs,kode,N2...。我想用這個代碼改變N值與N2的值，N和更多的是風箭頭

更新查詢，可以更簡單嗎？ UPDATE table1 SET N=(select N2 from table2 where tracs='daraname2' AND kode='1-6'), NE=(select NE2 from table2 where tracs='daraname2' AND kode='1-6'), E=(select E2 from table2 where tracs='daraname2' AND kode='1-6'), SE=(select SE2 from table2 where tracs='daraname2' AND kode='1-6'), S=(select S2 from table2 where tracs='daraname2' AND kode='1-6'), SW=(select SW2 from table2 where tracs='daraname2' AND kode='1-6'), W=(select W2 from table2 where tracs='daraname2' AND kode='1-6'), NW=(select NW2 from table2 where tracs='daraname2' AND kode='1-6') WHERE tracsName='daraname2' AND tracsid='1-6'

我有一個錯誤，如果你能給我的邏輯或代碼，它會很好。

Answer 1

這裏是mysql的一般語法：

UPDATE TABLE1 a 
JOIN TABLE2 b ON a.name1 = b.name2 
SET a.n1 = b.n2 

這裏是舉例sql server：

UPDATE a 
SET n1 = b.n2  
FROM TABLE1 a 
JOIN TABLE2 b ON a.name1 = b.name2 

Answer 2

試試這個代碼

UPDATE table1 

SET  table1.N = table2.n 
FROM table2 WHERE name2 = name1