I get the Error:
Column count doesn't match value count at row 1.
But I've checked and rechecked my query and everything seems ok:
UPDATE
table
SET
col = 'enum(''FOO'',''BAR'')'
WHERE
col1 = ''
AND
col2 = 'val2'
AND
col3 = 3;
I thought the table could have some triggers that were generating the error –I didn't design the system– but I can't find any.
I've found the same error with at least three different tables.
Note. The "enum" on line three is really supposed to be a string, not an enum type.
It could be a few things, but here are two ideas:
-There is a trigger that needs to be changed/removed.
-The value that you are updating the cell to exceeds the column length. Article on this.
Apparently there were some triggers that updated another database, I don't know why show triggers from <dbname> returned an empty row set.
Apparently, when migrating their system, they had to ask support to create the triggers for them.
Some time triggers create this issue as well. For example I have create a trigger to log the entries, when I add some field in master table and try to update the master table it display the same error. After some work around, I got the point and create the same field in log table and it fix the issue.
Related
I am trying to create a trigger to simultaneously update a different table than the one I have updated, with the same data.
I have two different database with the same tables and i'm trying to sync them, when i insert, update or delete data from one, i want to do automaticaly the same to the other table, with triggers.
This is the trigger code:
CREATE DEFINER=`Ivan_test`#`%` TRIGGER `Prueba_Ivan`.`mag_articulos_PI_AFTER_UPDATE` AFTER UPDATE ON `mag_articulos_PI` FOR EACH ROW
BEGIN
IF OLD.Prueba_Ivan.mag_articulos_PI NOT IN (SELECT * FROM ivan_test.mag_articulos_IT) THEN
INSERT INTO ivan_test.mag_articulos_IT
VALUES (new.xempresa_id, new.xarticulo_id, new.xcategoria_id, new.xvisible_web, new.xnovedad,new.xpromocion,new.ximagen_prelim,new.ximagen_amp,new.xtexto1,new.xtexto2,new.xtexto3,new.xtexto4,new.xtexto5);
ELSE
UPDATE ivan_test.mag_articulos_IT SET OLD.ivan_test.mag_articulos_IT = NEW.Prueba_Ivan.mag_articulos_PI;
END IF;
END
but I have this error:
Error Code: 1109. Unknown table 'OLD.Prueba_Ivan' in IN/ALL/ANY subquery
Can someone help me to find the mistake?
Thank you!!
OLD.Prueba_Ivan.mag_articulos_PI
OLD is an alias to the triggered row. Your trigger applies to Prueba_Ivan, which means that OLD and NEW are representing your Prueba_Ivan record before the change, and after it, respectively. This means that when you intend to reference mag_articulos_PI, you will need to do it via OLD.mag_articulos_PI, so remove the tablename from that expression.
OLD.ivan_test.mag_articulos_IT
As mentioned in the previous section, here OLD is an alter-ego of the updated Prueba_Ivan record, you do not need it in order to reference ivan_test.
Further explanation
An expression of the form of
a.b.c
reads as follows:
In database a, table b, column c. When you do something of the like of
OLD.t.c
it reads: In the OLD database, table t, column c.
I have an SQL database with over 800 entries and 40 values for each entry. I would like to add a column that increases every time any of that row's values change. It would be like a version number for each individual row so I know which rows have edited data.
I know little to nothing about sql coding, I just use phpmyadmin to hold my data. Is something like this possible without adding some sort of function, and if not, how would I go about implementing something like this. Any input would be appreciated.
You can use triggers to do this job. Run the following query in phpmyadmin after editing the table name and column name for count
CREATE TRIGGER incr_on_update BEFORE UPDATE ON yourtablename
FOR EACH ROW SET NEW.count =OLD.count+1;
I'm trying to find the most effecient way of inserting data into another table when a particular field is updated on trigger table. The INSERT should only occur on a specific type of update.
The table on which I want to create the trigger is named incremental. The table I'm inserting into is named crm_record
On incremental there is a field called status. By default when a record is initially added to the table the status field is set to new. After billing has processed that value changes to processed. So once this occurs I want to INSERT into crm_record, only if the value of another field (success) is set to 1.
I have considered using both CASE and IF but would like an expert's opinion on the best way to do this.
Ok, I eventually went with this that seemed to work. Thanks for pointing me in the right direction
CREATE TRIGGER `incremental5_after_ins_tr_crmm` AFTER UPDATE ON `incremental5`
FOR EACH ROW
BEGIN
IF Status = 'processed' AND Success = 1 THEN
INSERT INTO crm_master (msisdn,source,contract_type,revenue) VALUE (new.msisdn,'INC5',new.contract_type,revenue=revenue+2.5)
ON DUPLICATE KEY UPDATE contract_type=new.contract_type,revenue=revenue+2.5;
END IF;
END;
All you need to do is to create an AFTER UPDATE trigger and test the value of status and success together. If it's going only going to be one state you're testing for then an IF statement would be the simplest way to go about it.
However before implementing a trigger it's always worth going back a step and checking to see if the row in crm_record shouldn't actually be inserted via the code logic when the status and success columns are updated.
I'm trying to update one table based on values in another table. What's wrong with the following request? Error: Unknown column 'source.col3' in 'where clause'
UPDATE target
SET target.col1 = source.col1 * target.col2,
WHERE target.col3 = source.col3
Well, for one you're not specifying 'source' as a table anywhere.
MySQL actually supports multiple table update, so you could write your code as:
UPDATE target, source
SET target.col1=source.col1*target.col2
WHERE target.col3=source.col3
Now whether that would actually do what you want I can't tell without knowing more about your tables.
Is it possible to check whether a particular value in a column exists in other databases using trigger? These two databases are located inside the same MYSQL instance. Specifically, what I want to do is this:
Before a row is added to a table ( Document_Index_table) inside Database A ( Document_DB).
A trigger is fired. This trigger carries the one of the column value (usr_id) inside the row and pass it to Database B ( User_Control_DB).
Based on the values, User_Control_DB will check whether the usr_id exists in column usr_id of the table (Usr_Information).
If exists, then return a true to Document_DB and the row in 1. is allowed to add to the Document_DB.
If not, then an error is issued. No row is added to Document_DB.
How can this be done, if it can be done at all?
Edit: Both databases are MySQL databases
So, I'm a complete novice at database development, but you could do something like this:
Create a 'Before' insert trigger on your document_index_table.
The trigger does something like this:
declare numRows integer;
select count(*) from user_control_db.usr_information where usr_id = NEW.usr_id into num_rows;
if (numRows > 0) then
call NonExistentProc();
end if;
I believe that this would accomplish what you wanted. It'll produce an error like "PROCEDURE documentdb.NonExistenProc does not exist" and skip the insert if there isn't at least one row that has the matching usr id in the user control db.
Again, I'm a novice at this DB stuff so there might be a more elegant way, but this worked for my single test case.
Hope that helps.