MySQL内部连接两个表，并在匹配的行字段中将一个表的行插入另一个表

Question

So, I have to build a query to add a new row in customer_entity_varchar for each entity_id containing the data from the customer_address_entity_varchar table.

Table structure is as such:

+----------+----------------+--------------+-----------+---------+
| value_id | entity_type_id | attribute_id | entity_id |  value  |
+----------+----------------+--------------+-----------+---------+
|  132     |              1 |      5       |     12    | John    |
|  133     |              1 |      7       |     12    | Doe     |
|  134     |              1 |     241      |     12    | 8675309 |
+----------+----------------+--------------+-----------+---------+

value_id is autoincrement, generated by the table.

entity_type_id will always be 1 (varchar).

attribute_id should be set to 315.

entity_id will match between tables.

value of customer_address_entity_varchar .value where customer_address_entity_varchar.attribute_id = 24 should be written in as a new row to customer_entity_varchar .

Let me know if you need any more information.

Here is a SQL fiddle with an attempt at an INSERT query solution:

http://sqlfiddle.com/#!2/42ffdf/1

Answer 1

Having researched it further and tested it out, the answer I was looking for is:

INSERT INTO customer_entity_varchar 
(`entity_type_id`, `attribute_id`, `entity_id`, `value`) 
SELECT 1 AS `entity_type_id`, 315 AS `attribute_id`, `entity_id`, `value` 
FROM customer_address_entity_varchar WHERE `attribute_id` = 24