Updating self joined table

Updating self joined table

By : Urwish Patel
Date : November 21 2020, 01:01 AM
With these it helps Ok, if I understand, you want to take each ID in shop 255, find its corresponding id in shop 233, get the parent of that id (in 233), then find the corresponding parent in shop 255, right?
Assuming there are no duplicate names in each shop, this is how I would do it in SQL Server.. probably the same for MySQL:
code :
SET parent_id=p255.id
FROM t_category t255
INNER JOIN t_category t233 ON t255.Name=t233.Name AND t233.shop_id=233
INNER JOIN t_category p233 ON p233.id=t233.parent_id
INNER JOIN t_category p255 ON p255.Name=p233.Name
WHERE t255.shop_id=255

Share : facebook icon twitter icon
Updating a joined table PHP MySQL

Updating a joined table PHP MySQL

By : user3247291
Date : March 29 2020, 07:55 AM
wish of those help In MySQL I know its possible to select from two tables that have been joined, but is it possible to update the same two tables using a join? Or will I have to update each table individually? , Yes, e.g.
code :
UPDATE table1 t1 
JOIN table2 t2
    ON t2.id = t1.id -- Your keys.
SET t1.column = '...', t2.column = '...' -- Your Updates
WHERE ... -- Your conditional
Updating MySQL Table A based on value from Table B joined via intersection Table C

Updating MySQL Table A based on value from Table B joined via intersection Table C

By : Igor Yuzo
Date : March 29 2020, 07:55 AM
I hope this helps you . You should have on clause with join of writers table and your subquery.
Updating a Database Joined view in only 1 base table

Updating a Database Joined view in only 1 base table

By : Chen
Date : March 29 2020, 07:55 AM
wish help you to fix your issue No, If you want to update or insert via db view that view should be created using only one table. Consider below example, please.
Preparing tables tab and tab2
code :
create table tab
      id int

    create table tab2
      id int
   create view vtab
   select * from tab

   create view vtabboth
   select t.id as tid ,t2.id as t2id from tab t
   join tab2 t2 on t.id = t2.id   
   insert into vtab
   values (1)
   insert into vtabboth
   values (1,1)
Mysql Trigger not updating joined table

Mysql Trigger not updating joined table

By : user1815469
Date : March 29 2020, 07:55 AM
it fixes the issue For some reason this trigger is not updating the Order table, what might I be doing incorrectly?
code :
select orderitemID, SUM(orderitem.UnitPrice) sum_price
from orderitem 
group by orderitemID
select orderID, SUM(orderitem.UnitPrice) sum_price
from orderitem 
group by orderID
CREATE DEFINER = 'root'@'localhost' TRIGGER `orderTotalInsert` 
 UPDATE `Order`
    SELECT orderID, SUM(orderitem.UnitPrice) sum_price
    FROM orderitem
    WHERE orderID = NEW.orderID
    GROUP BY orderID
 )  t on t.orderID = order.OrderId 
 SET Order.TotalAmmount = t.sum_price;
Updating individual table from two joined tables (SQL)

Updating individual table from two joined tables (SQL)

By : Waheeda
Date : March 29 2020, 07:55 AM
it should still fix some issue Your question is a bit unclear. But the general answer is "yes". Here are some mechanisms:
Related Posts Related Posts :
  • How to Select record with the maximum value in a GROUP BY?
  • MySQL Innodb Full text Proximity Search Gives Horrible Performance
  • MySQL best approach for db normalising, relationships and foreign keys
  • How to update one table based on the count value of another table while matching ids?
  • MAMP Pro 5.1.1-terminates MySQL when quitting
  • SQL - Get date of most votes cast
  • "Fuzzier" search in mysql
  • Tracing mysqld Using SystemTap
  • SELECT + INSERT + Query Cache = MySQL lock up
  • SQL vs. NoSQL for medium complexity search systems
  • SQL Error when creating table
  • Is it possible to write a query to compare rows to other rows in same table?
  • Display all duplicate records based multiple columns
  • summing time column in mysql
  • InnoDB: Cannot open table
  • Why is IN() considered O(logN) operation?
  • Can a deadlock occur on commit?
  • Is there a fast way to do a '%phrase%' search in any DB?
  • Is using an IN over a huge data set a good idea?
  • How can I know if a table is already arranged in ascending order in MySQL?
  • MySQL - Designing database for a simple game
  • Why am I getting "Host '' is not allowed to connect to this MySQL server"?
  • what type of password hash? possible mysql hash?
  • MySQL - Using a date range vs functions
  • Using IS NULL and COALESCE in OrderBy Doctrine Querybuilder
  • How to merge MySQL columns into one column if there are empty values in the table?
  • Cardinality Confusion
  • Renaming column multiple ids in SELECT
  • Group all from and to messages per user
  • How to handled the null values in WHERE IN condition in mysql
  • Is it okay to update primary key field to shift a record to the top?
  • Stop query through pdo
  • How to check whether particular value in field in MySQL exists
  • Execute a statement for every table in a database
  • insertion 74G data into mysql table cost more then 2 days, how to improve insert performance
  • Where can I see the differents "Hibernate Console Configurations" in Eclipse
  • MySql | relational database vs non relational database in terms of Performance
  • Exporting mysql database using mysqldump including procedures
  • Trigger MySQL not working
  • How do I update values for individual rows quickly?
  • MySQL join query with multiple where condition
  • MySQL stored procedure is not working
  • MySQL - Order By exact match at the end
  • Select max date or null date from same table MySQL
  • Best solution workaround for needing a mysql event on insert?
  • MySQL select several columns of several tables at the same time without using JOIN
  • Is it more efficient to have a table with one of its columns mostly empty or make a new table and refer to it?
  • mysql data truncated with ñ character
  • MySQL Distinct Active Users for the last month query
  • Get all rows that match another attribute in the same table
  • MySQL statement to get min value with max ID
  • DATEDIFF Current/Date for Last Record
  • What is the logic or procedure for combining multiple DB query's results into one elegant table?
  • Modify TIMESTAMP MySQL for use as Primary Key
  • Django - Efficiently bulk create inherited models
  • MySQL Dual table Join Dual table
  • Ruby on Rails - database where sorted by id
  • MySQL 5.6 : Access denied for user 'root' @ 'localhost' when password contains backslash
  • sql query case dateadd
  • Click on one button multiple times and mySql
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org