The following code is a trigger I wrote in Navicat for Mysql. The inserting part is working correctly but for update I need to update a specific row quantity based on id. How do I write the where clause in the update sql query.
insert into closingstockt(CLS_BSID,CLS_Qty,CLS_SQty,CLS_CDate)
select BS_ID as CLS_BSID,BS_Qty as CLS_Qty,BSS_Qty as CLS_SQty,curdate()
from barstockt
where CLS_BSID=BS_ID
on duplicate key update CLS_Qty=BS_Qty,CLS_SQty=BSS_Qty
ON DUPLICATE KEY UPDATE will update the row which already exist in the database. For example:
INSERT INTO table (field,field2) VALUES ('data1','data2')
ON DUPLICATE KEY UPDATE lastupdate=NOW()
EDIT: I suggest to use IF()
INSERT ... ON DUPLICATE KEY UPDATE with WHERE?
Related
I have this UPDATE MySQL statement which works fine.
UPDATE table1
Inner Join table2
ON table2.id = table1.gw_id
SET table1.field1=1, table1.field2=2
WHERE table1.nick_no=4 AND table2.addr=123
I would like to convert this UPDATE statement such that it can add a new row if a row with the same table1_nick_no is not found. I believe using INSERT INTO ON DUPLICATE KEY UPDATE is the right way to go. However, I tried for a long time but failed. Adding Inner join and where clause to INSERT INTO ON DUPLICATE KEY UPDATE
How should I convert this UPDATE statement into the corresponding INSERT INTO ON DUPLICATE KEY UPDATE statement?
What you are looking for is a MERGE or an UPSERT (short for UPDATE/INSERT). In mySQL you can achieve an UPSET as described in the following link
http://mechanics.flite.com/blog/2013/09/30/how-to-do-an-upsert-in-mysql/
I have mysql database. I need to update country list on my table. there is some country in my table. I need to check that country if not exist and insert to the table. I'm used following sql script. But this is not working. when execute this code it will duplicate the record.
MySQL Query:
INSERT INTO `moneyexpressstore`.`countries` (`Name`, `Code`, `CurrencyId`) VALUES
('Australia', 'au', NULL) ON DUPLICATE KEY UPDATE Name=VALUES(Name)
thanks,
First make sure your database does not have duplicate records on column countries, then execute this
CREATE UNIQUE INDEX countriesindex ON countries (Name(50))
50 is the amount of characters that the index will search for "unique" values. For example if that number was 3, then these two different string would be considered the same, and a 1062 Duplicate Entry error would occur abcHELLO=abcWORLD and in your case it would force the UPDATE instead of INSERT.
If you get a 1062 error, that means you have duplicates in your db so find them remove them and try again.
After this your query will execute just fine and will update instead of duplicate on "Name"
Have a look in the documentation of mysql https://dev.mysql.com/doc/refman/5.1/en/insert-on-duplicate.html
INSERT INTO table (a,b,c) VALUES (1,2,3)
ON DUPLICATE KEY UPDATE c=c+1;
Try this:
insert into `moneyexpressstore`.`countries` (id, `Name`, `Code`, `CurrencyId`) values(NULL,'Australia', 'au', NULL) on duplicate key update name=values(name)
Please refer this link:
http://dev.mysql.com/doc/refman/5.1/en/insert-on-duplicate.html
Im running a database log and every day I log on a new row. My Mysql query therefore checks if the day (date (the unique key)) already exists, and if so, it tries to increment all the loggable values of the log-row by one. If the date record doesnt eyist yet, it will create a new row.
My SQL query is:
INSERT INTO `log` (`date`,`hits`,`stale`)
VALUES ('2012-03-06',1,1)
ON DUPLICATE KEY
UPDATE `hits`=`hits`+1,`stale`=`stale`+1
WHERE `date`='2012-03-06';"
All columns have 0 as default value, so if this query runs directly after midnight only 'stale' and 'hits' are set to 1. Otherwise 'stale' and 'hits' are both incremented.
I wish! (it doesn't work).
What am I missing? Which separator other then a comma should I use between 'hits' = 'hits' +1 and 'stale'='stale'+1?
Just get rid of the WHERE clause:
INSERT INTO `log` (`date`,`hits`,`stale`)
VALUES ('2012-03-06',1,1)
ON DUPLICATE KEY
UPDATE `hits`=`hits`+1,`stale`=`stale`+1;
Your separator is correct, but the UPDATE has already found the duplicate row to be able to trigger the ON DUPLICATE KEY, so you don't need to try to select it again using WHERE.
INSERT INTO `log` (`date`,`hits`,`stale`)
VALUES ('2012-03-06',1,1)
ON DUPLICATE KEY
UPDATE `hits`=`hits`+1,`stale`=`stale`+1
Demo here.
You shouldn't have the WHERE clause. ON DUPLICATE KEY UPDATE automatically limits the row it affects to the one that has the existing key.
Remove it and your query should work fine.
If you only want to do the update if some specific expression is true, you can do it with two statements:
INSERT IGNORE INTO x VALUES (.....);
UPDATE x SET ..... WHERE .....;
The INSERT will silently fail if there is a duplicate key.
I have a query like so:
INSERT INTO table1 (field1,field2) VALUES ('$value1','$value2') ON DUPLICATE KEY UPDATE field1 = '$value1'
I then want to get the last insert id if it does the insert, how can I do this? If the query ends up doing an update I dont want the last insert id. Is there a way to determine if it did an update or a insert?
I guess I should of searched the site before posting. Basically adding this worked:
id=LAST_INSERT_ID(id)
On the on duplicate update. I found that answer here:
Duplicate Key Last Insert ID
According to this MySQL Manual Page:
If a table contains an AUTO_INCREMENT
column and INSERT ... ON DUPLICATE KEY
UPDATE inserts or updates a row, the
LAST_INSERT_ID() function returns the
AUTO_INCREMENT value.
I want to update a record which may or may not be present in a table. If it is not present in the database then it will be inserted.
To prevent from select I am using UPDATE statement first and checking affected_rows > 0 if not then I am inserting this record into the table.
I was wondering if there is a better way to do this?
You could use INSERT ... ON DUPLICATE KEY UPDATE syntax:
INSERT INTO table (a,b,c) VALUES (1,2,3)
ON DUPLICATE KEY UPDATE c=c+1;
http://dev.mysql.com/doc/refman/4.1/en/insert-on-duplicate.html
The difference between this and REPLACE (Femaref's answer) is that REPLACE will delete the old row and then insert a new row if a key is duplicated, while this will update the existing row.
Use Replace instead of Insert.
http://dev.mysql.com/doc/refman/5.0/en/replace.html