Bulk update mysql with where statement

问题

How to update mysql data in bulk ? How to define something like this :

UPDATE `table` 
WHERE `column1` = somevalues
SET  `column2` = othervalues

with somevalues like :

VALUES
    ('160009'),
    ('160010'),
    ('160011');

and othervalues :

VALUES
    ('val1'),
    ('val2'),
    ('val3');

maybe it's impossible with mysql ? a php script ?

回答1:

The easiest solution in your case is to use ON DUPLICATE KEY UPDATE construction. It works really fast, and does the job in easy way.

INSERT into `table` (id, fruit)
    VALUES (1, 'apple'), (2, 'orange'), (3, 'peach')
    ON DUPLICATE KEY UPDATE fruit = VALUES(fruit);

or to use CASE construction

UPDATE table
SET column2 = (CASE column1 WHEN 1 THEN 'val1'
                 WHEN 2 THEN 'val2'
                 WHEN 3 THEN 'val3'
         END)
WHERE column1 IN(1, 2 ,3);

回答2:

If the "bulk" data you have is dynamic and is coming from PHP (you did tag it, after all), then the query would look something like this:

INSERT INTO `foo` (id, bar)
VALUES 
    (1, 'pineapple'),
    (2, 'asian pear'),
    (5, 'peach')
ON DUPLICATE KEY UPDATE bar = VALUES(bar);

and the PHP to generate this from an existing array (assuming the array is of a format like:

$array = (
    somevalues_key => othervalues_value
);

) would look something like this (by no means the best (doesn't address escaping or sanitizing the values, for instance), just an quick example):

$pairs = array();
foreach ($array as $key => $value) {
    $pairs[] = "($key, '$value')";
}

$query = "INSERT INTO `foo` (id, bar) VALUES " . implode(', ', $pairs) . " ON DUPLICATE KEY UPDATE bar = VALUES(bar)";

回答3:

If you have data in array format then try this

and your query is like "UPDATE table WHERE column1 = ? SET column2 = ?"

then set it like below

foreach($data as $key => $value) {
    $query->bind_param('ss', $key, $value);
    $query->execute();
}

hope it'll work.

Reference from this.

来源：https://stackoverflow.com/questions/35726910/bulk-update-mysql-with-where-statement

标签

mysql

sql-update

bulk