如何在mysql中將一些行復制到其他行

Question

有人可以說我如何復制這樣的行：

將字段名稱從ID 1-10復制到ID為31-40

例：

1 foo
...
31 bla

之后應該是：

1 foo
...
31 foo

Answer 1

UPDATE table A
set name = (select B.name from table B where B.Id = A.Id - 30)
where A.id between 31 AND 40

Answer 2

像這樣

UPDATE tablename    
SET fieldname = ( SELECT tablename.fieldname
FROM tablename t2
WHERE t2.id = (tablename.id-30))

WHERE tablename.id BETWEEN 31 AND 40;

Answer 3

UPDATE TABLE A INNER JOIN TABLE B ON A.Id = B.Id + 30
SET A.NAME = B.NAME
WHERE A.Id Between 31 and 40