I now have a MySQL Command for Updating a Row of a MySQL Table with Values from another Table.
update info set info.artist = playlist.artist
from playlist
where info.songname = playlist.songname
There is an Syntax Error. But I can see anything in there.
1st Table
2nd Table
Thanks :)
Try this:
UPDATE info
INNER JOIN playlist ON info.songname = playlist.songname
SET info.artist = playlist.artist
2nd Sample:
UPDATE info
INNER JOIN (
SELECT songname, artist
FROM playlist
WHERE playlist.time_requested IS NOT NULL
ORDER BY playlist.time_requested
LIMIT 1
) PL ON info.songname = PL.songname
SET info.artist = PL.artist
Related
Example we have 2 tables:
device_tb has columns "device_num" and "device_name"
property_tb has columns "id" and "item_name(currently null or placeholder values)"
device_tb.device_num is equal to the property_tb.id as in it lists the unique id of the product.
If i want to update property_tb.item_name with the strings from device_name instead of manually keying in the names how would i go about it?
Would this work?
UPDATE property_tb
SET item_name= device_tb.device_name
WHERE property_tb.id = device_tb.device_num
You have to join both the tables before updating. Here is the sample code
UPDATE property_tb
SET property_tb.item_name = device_tb.device_name
FROM property_tb
JOIN device_tb ON property_tb.id = device_tb.device_num
In MySQL, the correct syntax for an UPDATE with JOIN is:
UPDATE property_tb p JOIN
device_tb d
ON p.id = d.device_num
SET p.item_name= d.device_name;
I need to run an UPDATE query:
UPDATE products
SET fcategory = SELECT fcategory
FROM categories
WHERE categories.scategory = products.scategory
i.e. for the rows in "products" where column scategory = categories.scategory, products.fcategory must be updated to categories.fcategory
Example:
categories.scategory monkies, categories.category gorilla
products.scategory monkies
=> products.fcategory must be updated to gorilla since products.scategory = monkies = products.scategory
Anyone knows how to write such an UPDATE query?
Thanks.
Use a JOIN
UPDATE products AS p
JOIN categories AS c ON p.scategory = c.scategory
SET p.fcategory = c.scategory
Let's say I have two tables in a MySQL database. I would like to update the data from a column in the source table to a column in the target table.
Source table is called 'Computers_F1' Source column is called 'Family'.
Target table is called 'Advice' Target column is called 'Fase1'
I want to put all the rows from 'Family' into 'Fase1'. But this without it adding new rows. I want all the information to be updated in the existing rows.
Hope you guys can help me!
You can do something like this if you have a column id to match both
UPDATE Advice AS a
SET Fase1 = (SELECT Family FROM Computers_F1 AS c WHERE a.id = c.id)
And then rename the column Fase1
ALTER TABLE Active CHANGE `Fase1` `Family` VARCHAR(255)
(replacing VARCHAR(255) with the right format of your column)
I know 2 ways:
UPDATE Advice, Computers_F1
SET Advice.Fase1 = Computers_F1.Family
WHERE Advice.Id = Computers_F1.Id;
OR
UPDATE Advice
INNER JOIN Computers_F1
ON Advice.Id = Computers_F1.Id
SET Advice.Fase1 = Computers_F1.Family;
Hope this helps...
UPDATE
Correct examples, with foreign keys:
UPDATE Advice, Computers_F1
SET Advice.Fase1 = Computers_F1.Family
WHERE Advice.Computers_F1_Id = Computers_F1.Id;
OR
UPDATE Advice, Computers_F1
SET Advice.Fase1 = Computers_F1.Family
WHERE Advice.Id = Computers_F1.Advice_Id;
OR
UPDATE Advice
INNER JOIN Computers_F1
ON Advice.Computers_F1_Id = Computers_F1.Id
SET Advice.Fase1 = Computers_F1.Family;
OR
UPDATE Advice
INNER JOIN Computers_F1
ON Advice.Id = Computers_F1.Advice_Id
SET Advice.Fase1 = Computers_F1.Family;
I have two tables and both include 2 columns, sureness and kindness and and they are related to each other by dataitemID and id. Just to show you the structure I will put 2 selects that I got from database:
SELECT ID,sureness,kindness FROM omid.tweet ;
SELECT ID,DataitemID,sureness,kindness FROM omid.entity_epoch_data ;
and I want to copy all value of sureness and kindness in omid.tweet into entity_epoch_data where entity_epoch_data.entityID is equal to entityID coming from entity_relation where tweet.ID =entity_relation.ID
I want just to do it in mysql rather than reading the whole table in java and updating the database in the loop but I am so confused. How can I do that?I appreciate any help:)
Update:
I wrote the code as follow but it does not work:
update tweet, entity_epoch_data
set entity_epoch_data.sureness= tweet.sureness,
entity_epoch_data.kindness = tweet.kindness ,
entity_epoch_data.calmness = tweet.calmness ,
entity_epoch_data.happiness = tweet.happiness
WHERE entity_epoch_data.EntityID in(
SELECT EntityID FROM omid.entity_dataitem_relation
INNER JOIN omid.tweet t ON entity_dataitem_relation.DataitemID = t.ID)
It's actually pretty straight forward. The UPDATE clause works like a JOIN and then use SET to set the values
UPDATE tweet INNER JOIN entity_epoch_data
ON tweet.id = entity_epoch_data.id
SET entity_epoch_data.sureness= tweet.sureness,
entity_epoch_data.kindness = tweet.kindness
I need a query to:
Copy from database player, table item_proto_0, column locale_name
Paste to database player, table item_proto, column locale_name
But:
Just paste if has the same colum vnum
I've tried:
UPDATE item_proto.locale_name
SET item_proto_0.locale_name
WHERE item_proto_0.vnum=item_proto.vnum
Try this:
UPDATE item_proto P1
JOIN item_proto_0 P2
ON P1.vnum = P2.vnum
SET P1.locale_name = P2.locale_name
This should work:
UPDATE item_proto AS ip
INNER JOIN item_proto_0 ip0 ON ip.vnum = ip0.vnum
SET locale_name = ip0.locale_name
Please run this sql query this should do the needful
UPDATE item_proto
inner join item_proto_0 on item_proto.vnum = item_proto_0.vnum
SET item_proto.locale_name = item_proto_0.locale_name