如何将一列从一个表复制到另一个表

Question

I got two tables. I need to copy data from one table to another based on id

table1

+----+------------------------+------+
| id | title                  | year |
+----+------------------------+------+
|  1 | Carmencita             | 1894 |
|  2 | Le clown et ses chiens | 1892 |
|  3 | Pauvre Pierrot         | 1892 |
+----+------------------------+------+

table 2:

+----+------------------------+------+
| id | title                  | year |
+----+------------------------+------+
|  1 | Carmencita             | 0    |
|  2 | Le clown et ses chiens | 0    |
|  3 | Pauvre Pierrot         | 0    |
+----+------------------------+------+

How can i copy the year column from table 1 to table two so that they have correct ids

Answer 1

This will update the year column in Table2 to match the value in Table1 where the id is the same in both tables:

update Table2
inner join Table1 on Table1.`id` = Table2.`id`
set Table2.`year` = table1.`year`;

Sample SQL Fiddle

For reference: MySQL manual for UPDATE