表 1:
id name desc
-----------------------
1 a abc
2 b def
3 c adf
表 2:
id name desc
-----------------------
1 x 123
2 y 345
在 oracle SQL 中,如何运行 sql update 查询,该查询可以使用相同的表 2 的 name
和 desc
更新表 1id
?所以我得到的最终结果是
In oracle SQL, how do I run an sql update query that can update Table 1 with Table 2's name
and desc
using the same id
? So the end result I would get is
表 1:
id name desc
-----------------------
1 x 123
2 y 345
3 c adf
问题来自用另一个表更新一个表,但专门用于 oracle SQL.
Question is taken from update one table with data from another, but specifically for oracle SQL.
这称为相关更新
UPDATE table1 t1
SET (name, desc) = (SELECT t2.name, t2.desc
FROM table2 t2
WHERE t1.id = t2.id)
WHERE EXISTS (
SELECT 1
FROM table2 t2
WHERE t1.id = t2.id )
假设联接结果为保留键的视图,您还可以
Assuming the join results in a key-preserved view, you could also
UPDATE (SELECT t1.id,
t1.name name1,
t1.desc desc1,
t2.name name2,
t2.desc desc2
FROM table1 t1,
table2 t2
WHERE t1.id = t2.id)
SET name1 = name2,
desc1 = desc2
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