logo
down
shadow

Performing JOIN between two tables


Performing JOIN between two tables

By : user2953053
Date : November 19 2020, 03:59 PM
I wish did fix the issue. I have two tables like this: , Try this:
code :
SELECT t1.user_id, t1.item_id, t1.item_number, COUNT(attribute) AS number
FROM table_1 t1
LEFT OUTER JOIN table_2 t2 ON t1.user_id = t2.user_id AND t1.item_id = t2.item_id
WHERE t1.user_id = '1'
GROUP BY t1.user_id, t1.item_id;


Share : facebook icon twitter icon
Performing an INNER JOIN across 2 tables with COUNT()

Performing an INNER JOIN across 2 tables with COUNT()


By : Sayed Masud
Date : March 29 2020, 07:55 AM
like below fixes the issue You should be using LEFT JOIN instead of INNER JOIN and don't forget to use GROUP BY clause since you are using aggregate function COUNT().
code :
SELECT  e.event_id,
        e.name,
        COUNT(o.event_id) AS booked     
FROM    events AS e
        LEFT JOIN orders AS o
            ON e.event_id = o.event_id
WHERE   e.event_id IN (1, 2, 3)
GROUP   BY e.event_id, e.name
Performing a Hibernate Join on two tables with a One to Many Association

Performing a Hibernate Join on two tables with a One to Many Association


By : Shahnawaz S
Date : March 29 2020, 07:55 AM
Hope that helps When using JPA/Hibernate, avoid thinking in columns when possible. Think of entities and let the framework do the change.
Your query is requesting just a list of EmployeeModel, because you do
code :
   sess.createCriteria(EmployeeModel.class)
private int table_id;
private int emp_id;
private String location;
private int table_id;
private Employee employee;
private String location;
Laravel 5 - Performing a join with database tables

Laravel 5 - Performing a join with database tables


By : WangQiming
Date : March 29 2020, 07:55 AM
help you fix your problem You missed the departments table name so sql rendered the departmentId as ambiguous since it can be found in both users and departments table. Your query should be like this.
code :
$test = DB::table('users')
    ->join('departments', 'users.departmentId', '=', 'departments.departmentId')
    ->select('users.userName', 'users.id')
    ->get();
 $test = DB::table('users')
    ->join('departments', 'users.departmentId', '=', 'departments.departmentId')
    ->select('users.userName', 'users.id')
    ->where('departments.departmentName', "department name goes here")
    ->get();
Error when selecting from two tables and performing an inner join on another

Error when selecting from two tables and performing an inner join on another


By : Jason Goldfine-Middl
Date : March 29 2020, 07:55 AM
will help you , try this
code :
      select  t1.*, t2.* 
      from [table_comments1] t1 inner join users u
      on t1.fk_user_id = u.user_id 
      inner join [table_comments2] t2
      on t2.fk_user_id = u.user_id
Performing join operation on 3 tables using knex

Performing join operation on 3 tables using knex


By : Vinícius Melo
Date : March 29 2020, 07:55 AM
like below fixes the issue Actually, the query works just fine. Due to syntax error, I wasn't able to execute it
code :
async getUser(id) {
    return camelizeKeys(
        await knex
        .select(
            'u.id',
            'u.first_name',
            'u.last_name',
            'u.username',
            'u.image_url',
            'u.is_admin',
            'u.phone',
            'u.info',
            'la.email',
            'cu.customer_id',
            'cu.department_id'
        )
        .from('user AS u')
        .leftJoin('local_auth AS la', 'la.user_id', 'u.id')
        .leftJoin('customer_user AS cu', 'cu.user_id', 'u.id')
        .where('u.id', '=', id)
        .first()
    );
}
Related Posts Related Posts :
  • 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 '192.168.1.220' 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
  • Select daily amount of specific values from same column
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org