Need to string comparision in MYSQL
I have two varchar variables.
DECLARE val1 VARCHAR(100) DEFAULT '1,2,3'; DECLARE val2 VARCHAR(100) DEFAULT '1,2'; DECLARE result VARCHAR(100) ; SET result= val1 compare val2;
My expectation is possible in MYSQL,If yes please guide me
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How do I fix it when I enter the name of a new student and select a teacher from the selectbox in the database, besides student id, the teacher's id?
I have 3 tables in my workbench. Student, Teacher, Student_teacher The database saves the names and updates the list of students.
Importing a new teacher is provided by a controller: https://hastebin.com/ecegalecum.java
The new student controller is the same. However, .jsp would be this: https://hastebin.com/lucipuxaxi.xml
My question would be the following. How do I fix it when I enter the name of a new student and select a teacher from the selectbox in the database (Teacher_diamonds), besides student id, the teacher's id? So far I've managed to create a new controller for this.
Student repository: https://hastebin.com/ejumugikam.css
Student entity: https://hastebin.com/izomeharur.java
A work with STS, MySQL Workbench.
MySQL Workbench Query returns 1 row, but same query in Jdbc returns 0
I wrote a query that returns 1 row when I run it in MySQL Workbench:
SELECT lot_num, block_num, base_price, SUM(price) AS options_price FROM lots AS l INNER JOIN models AS m ON l.model_id = m.id INNER JOIN lot_options AS lo ON l.id = lo.lot_id INNER JOIN options AS o ON lo.option_id = o.id GROUP BY l.id
When I try to run that in Jdbc I am getting 0 results. Here is how I have formatted the string for Jdbc:
SELECT lot_num, block_num, base_price, SUM(price) AS options_price FROM lots AS l INNER JOIN models AS m ON l.model_id = m.id INNER JOIN lot_options AS lo ON l.id = lo.lot_id INNER JOIN options AS o ON lo.option_id = o.id GROUP BY l.id;
This does not provide me with an error or anything. Just an empty result set.
I cannot figure out where I am going wrong with this query! Please bestow your SQL mastery upon me!