通过相同ID的其他表中另一行的值更新表中的行

Question

I want update table contracts by values in contracts_history table where both of id is same of other.

I write this code but not work :

function recover_contract($contract_id)
{
$sql = "UPDATE contracts SET ROW = (SELECT * FROM contracts_history WHERE contracts.ID = contracts_history.ID)";
$result = $this->update($sql);
return $result;
}

UPDATE:
I use this code

update 
contracts a, 
contracts_history b 
set 
a.name_surname=b.name_surname 

But my table has 64 structure isn't any solution for copy all data with out type all of structure? must this :

$sql = "INSERT INTO `contracts_history` SELECT * FROM `contracts` 
        WHERE id='$contract_id'";

Answer 1

Can you try this as your Query?

$sql = "UPDATE contracts c 
        LEFT JOIN contracts_history h ON c.ID = h.ID 
        SET WHAT_YOU_WANT";

Answer 2

Since you are updating to one column, your subquery should only return one value.

Try,

UPDATE contracts 
SET ROW = (SELECT columnName
           FROM contracts_history 
           WHERE contracts.ID = contracts_history.ID
           LIMIT 1)

or using by using JOIN

UPDATE contracts a
       INNER JOIN contracts_history b
       ON a.ID = b.ID
SET    a.row = b.columnName

UPDATE 1

ok. so here it goes, on the first type which is updating using value from subquery, I added LIMIT at the select statement because you cannot update one column with multiple values on it or else you will get an error message. on the second part which is joining both tables, a.ID = b.ID is the relationship of both tables. This defines how the tables are related with each other. SET a.row = b.columnName , columnName is the source of the value which is basically on the table contracts_history .

Answer 3

The syntax is as follows:

update 
    contracts a, 
    contracts_history b 
set 
    a.col1=b.col1, 
    a.col2=b.col2 
where 
    a.id=b.id 

on that note though, you have no ID specified in the query, which means it will update ALL the rows that are in the history table. You can add condition like this:

update 
    contracts a, 
    contracts_history b 
set 
    a.col1=b.col1, 
    a.col2=b.col2 
where 
    a.id=b.id 
    and a.id=3