ON DUPLICATE KEY UPDATE only if second condition true - mysql

How do i update only if a second condition is true, it seems my version of mysql doesnt allow a WHERE at the end of ON DUPLICATE syntax.
INSERT INTO `proxies` (`proxy`,`response`,`PAYMENT`,`type`,`country`,`status`,`tier`,`last_checked`,`last_active`,`response_time`)
VALUES ('111.9.204.96:8123','200','coolproxies','anon','China','active','3','1400624136','1400624136','1.577639')
ON DUPLICATE KEY UPDATE `response`='200',`response_time`='1.577639',`type`='anon',`country`='China',`status`='active',`tier`='2',`last_checked`='1400624137'
this works ok, but I need to only update when WHERE last_checked < '1400624137' is true.
This is what the query that does this looks like.
INSERT INTO `proxies` (`proxy`,`response`,`PAYMENT`,`type`,`country`,`status`,`tier`,`last_checked`,`last_active`,`response_time`)
VALUES ('207.204.249.193:21320','200','scanner','anon','United States','active','1','1400633866','1400633866','1.59696')
ON DUPLICATE KEY UPDATE
`response_time` = IF(`last_checked` < '1400633866', '1.59696', `response_time`),
`status` = IF(`last_checked` < '1400633866', 'active', `status`),
`last_checked` = IF(`last_checked` < '1400633866', '1400633866', `last_checked`),
`last_active` = IF(`last_checked` < '1400633866', '1400633866', `last_active`);


An alternative to doing it in 2 queries as #GordonLinoff mentioned, is to use the method described in this related question you can use an IF to update based on a condition.
INSERT INTO `proxies` (...)
VALUES (...)
ON DUPLICATE KEY UPDATE
my_column = IF(last_checked < '1400624137', VALUES(my_column), my_column)
Basically what the IF does is when TRUE then update the field to the new value, otherwise if FALSE set it to the current value, which means no change to your existing data.


I think you need to do this as two statements:
update . . .
where last_checked < '1400624137';
insert ignore into proxies(. . .);
(or use on duplicate key update to do nothing).

Related

how to update with , seprator with preivous value in mysql

$r ='insert into posts set id="'.$id.'", postId="'.$idus.'" ON DUPLICATE KEY UPDATE whoLikes= whoLikes,$idus'
like := ON DUPLICATE KEY UPDATE new = new+'$new'
but i need:= ON DUPLICATE KEY UPDATE new = new,'$new'

You should be using MySQL concat() function:
... ON DUPLICATE KEY UPDATE `whoLikes`=CONCAT(`whoLikes`, $idus)

MYSQL ONDUPLICATE KEY UPDATE ISSUE

I am trying to use 'ON DUPLICATE KEY UPDATE' statement to update column when duplicate primary key are already in table.
but even if table has duplicated primary key, it does not update column.
below is 'ON DUPLICATE KEY UPDATE' statement.
is there somthing wrong?
ON DUPLICATE KEY UPDATE authenticated = authenticated
and notAuthenticated = notAuthenticated
and stoped = stoped
and deleted = deleted
and updatedDate = now()
;

use VALUES(Column) and replace all this AND with comma ,:
ON DUPLICATE KEY UPDATE authenticated = VALUES(authenticated),
notAuthenticated = VALUES(notAuthenticated),
stoped = VALUES(stoped),
deleted = VALUES(deleted),
updatedDate = now()

Don't use AND, but use commas:
ON DUPLICATE KEY UPDATE
authenticated = VALUES(authenticated),
notAuthenticated = VALUES(notAuthenticated),
stoped = VALUES(stoped),
deleted = VALUES(deleted),
updatedDate = now()

mysql - conditional insert row within a query with ON DUPLICATE KEY UPDATE

I have a complex query with a ON DUPLICATE KEY Update inside. I only want to insert the last value if there is no row with “timestamp_dag” = 1420070400, if there is a row with that condition I want to do nothing.
INSERT INTO data_prijzen_advertentie (
`ID_advertentie`,`jaar`,`rijnr`,`status_prijs`,`datum_dag`,`timestamp_dag`,
`prijs_maand`,`prijs_week`,`prijs_midweek`,`prijs_langweekend`,`prijs_weekend`,
`prijs_dag`,`prijs_ochtend`,`prijs_middag`
)
VALUES
(100,2014,1,1,'12-05-2014',1399852800,0,100,0,75,0,0,0,0),
(100,2014,2,1,'23-05-2014',1400803200,0,75,0,101,0,0,0,0),
(100,2014,3,1,'30-05-2014',1401408000,0,100,0,75,0,0,0,0),
(100,2014,4,1,'01-01-2015',1420070400,0,0,0,0,0,0,0,0)
ON DUPLICATE KEY UPDATE
status_prijs = VALUES(status_prijs), datum_dag = VALUES(datum_dag),
timestamp_dag = VALUES(timestamp_dag), prijs_maand = VALUES(prijs_maand),
prijs_week = VALUES(prijs_week), prijs_midweek = VALUES(prijs_midweek),
prijs_langweekend = VALUES(prijs_langweekend), prijs_weekend = VALUES(prijs_weekend),
prijs_dag = VALUES(prijs_dag), prijs_ochtend = VALUES(prijs_ochtend),
prijs_middag = VALUES(prijs_middag);

it's the best if you can handle this before the query string creation..
but if you can't, and your exceptional value is static, you can try something like this:
(I haven't tried to run it yet though)
INSERT INTO data_prijzen_advertentie (
`ID_advertentie`,`jaar`,`rijnr`,`status_prijs`,`datum_dag`,`timestamp_dag`,
`prijs_maand`,`prijs_week`,`prijs_midweek`,`prijs_langweekend`,`prijs_weekend`,
`prijs_dag`,`prijs_ochtend`,`prijs_middag`
)
VALUES
(100,2014,1,1,'12-05-2014',1399852800,0,100,0,75,0,0,0,0),
(100,2014,2,1,'23-05-2014',1400803200,0,75,0,101,0,0,0,0),
(100,2014,3,1,'30-05-2014',1401408000,0,100,0,75,0,0,0,0),
(100,2014,4,1,'01-01-2015',1420070400,0,0,0,0,0,0,0,0)
ON DUPLICATE KEY UPDATE
status_prijs = IF(timestamp_dag<>1420070400, VALUES(status_prijs), status_prijs),
datum_dag = IF(timestamp_dag<>1420070400, VALUES(datum_dag), datum_dag),
timestamp_dag = IF(timestamp_dag<>1420070400, VALUES(timestamp_dag), timestamp_dag),
prijs_maand = IF(timestamp_dag<>1420070400, VALUES(prijs_maand), prijs_maand),
prijs_week = IF(timestamp_dag<>1420070400, VALUES(prijs_week), prijs_week),
prijs_midweek = IF(timestamp_dag<>1420070400, VALUES(prijs_midweek), prijs_midweek),
prijs_langweekend = IF(timestamp_dag<>1420070400, VALUES(prijs_langweekend), prijs_langweekend),
prijs_weekend = IF(timestamp_dag<>1420070400, VALUES(prijs_weekend), prijs_weekend),
prijs_dag = IF(timestamp_dag<>1420070400, VALUES(prijs_dag), prijs_dag),
prijs_ochtend = IF(timestamp_dag<>1420070400, VALUES(prijs_ochtend), prijs_ochtend),
prijs_middag = IF(timestamp_dag<>1420070400, VALUES(prijs_middag), prijs_middag);

You will only have the ON DUPLICATE KEY UPDATE ... portion run if the timestamp_dag matches the criteria for triggering it. From the MySQL docs:
If you specify ON DUPLICATE KEY UPDATE, and a row is inserted that
would cause a duplicate value in a UNIQUE index or PRIMARY KEY, an
UPDATE of the old row is performed.
So assuming your table is built this way, then the update will trigger.
You can add a UNIQUE index using the syntax as described here.
CREATE UNIQUE INDEX ind_unique_timestamp_dag ON data_prijzen_advertentie (timestamp_dag)

Cancel Insert if inner query find nothing

I got the following query :
INSERT INTO contracts_settings (contract_id, setting_id, setting_value)
VALUES (:contract_id, (
SELECT setting_id
FROM settings
WHERE setting_type = :setting_type
AND setting_name = :setting_name
LIMIT 1
), :setting_value)
ON DUPLICATE KEY UPDATE setting_value = :setting_value
The value with the prefix : is replaced with data using PHP PDO::bindBalue.
If the inner query find nothing (it return NULL) but also INSERT a NULL statement. How to avoid that ?
Thanks.

Convert the INSERT ... VALUES syntax to INSERT ... SELECT:
INSERT INTO contracts_settings
(contract_id, setting_id, setting_value)
SELECT
:contract_id,
setting_id,
:setting_value
FROM settings
WHERE setting_type = :setting_type
AND setting_name = :setting_name
LIMIT 1
ON DUPLICATE KEY UPDATE
setting_value = :setting_value ;

If row dont exist, insert instead of update

UPDATE userpostratings SET rating = $rating WHERE postID = 8
If a there isnt a row in userpostratings with postID = 8 i wanna INSERT instead. Could this be done with sql or should I do it in php
Thanks
Tomek

see here: How do I update if exists, insert if not (AKA "upsert" or "merge") in MySQL?

If you have a UNIQUE index on postID, then you can do something like:
INSERT INTO userpostratings (rating, postID) VALUES ($rating, 8)
ON DUPLICATE KEY UPDATE rating = $rating;

here you go
http://nl2.php.net/manual/en/function.mysql-affected-rows.php
> mysql_query("UPDATE mytable SET used=1
> WHERE id < 10"); printf ("Updated
> records: %d\n",
> mysql_affected_rows());