Search results
If you're using PHP, you can use mysqli to do multi statements (I think php has shipped with mysqli for a while now) $con = new mysqli('localhost','user1','password','my_database'); $query = "Update MyTable SET col1='some value' WHERE id=1 LIMIT 1;"; $query .= "UPDATE MyTable SET col1='other value' WHERE id=2 LIMIT 1;"; //etc $con->multi_query ...
11 cze 2024 · Therefore updating multiple rows in a single query in MySQL can be efficiently done using the UPDATE statement having a WHERE clause in it. This WHERE clause is used to specify the criteria for records that you want to update.
29 gru 2017 · You will need to write very complicated conditions if you want to update more than two rows. In such a case you can use INSERT ... ON DUPLICATE KEY UPDATE approach.
UPDATE Multiple Records. It is the WHERE clause that determines how many records will be updated. The following SQL statement will update the PostalCode to 00000 for all records where country is "Mexico":
What is the easiest way to update many rows in a table? I have a csv file that looks like this: |primary_key |value|. | 1 | xyz|. | 2 | abc|. | 3 | def|. ... Rows with these primary keys already exist in the target table. I would like to update the target table with these values.
12 lis 2018 · There are a couple of ways to do it. 1. You can either write multiple UPDATE queries like this and run them all at once: UPDATE students SET score1 = 5, score2 = 8 WHERE id = 1; UPDATE students SET score1 = 10, score2 = 8 WHERE id = 2; UPDATE students SET score1 = 8, score2 = 3 WHERE id = 3;
18 lut 2018 · It is possible to update rows based on some condition. It is also possible to update multiple tables in one statement in MySQL. Whether the latter is a good idea is debatable, though.
