Do we have any query to union the three different columns of three different tables through stored procedure?
Which types exactly?
Why not create 3 sub queries then?
it is not possible but you can run two queries in parallel.
Not possible
They have nothing in common, you can’t integrate them
Do we have any query to union the three different columns of three different tables through stored procedure? Because as I know union is only applicable to combine the columns with same type of data. Is it possible to combine columns containing different types of data?
Do we have any query to union the three different columns of three different tables through stored procedure? Because as I know union is only applicable to combine the columns with same type of data. Is it possible to combine columns containing different types of data?
Which types exactly?
Can you not just use 3 sub queries somehow
Actually I need to union the data of three different tables and with distinct records for three columns where each column belongs to each table and I need to load this data to target
Why not create 3 sub queries then?
I have a request:
UPDATE category
SET name = (?) , title = (?), image = (?)
WHERE id = (?)
Instead of (?) I substitute values, but sometimes they can be empty and the request is not accepted, how can I ignore this and update only the data that is not empty?
I have a request:
UPDATE category
SET name = (?) , title = (?), image = (?)
WHERE id = (?)
Instead of (?) I substitute values, but sometimes they can be empty and the request is not accepted, how can I ignore this and update only the data that is not empty?
Validate values
I have a request:
UPDATE category
SET name = (?) , title = (?), image = (?)
WHERE id = (?)
Instead of (?) I substitute values, but sometimes they can be empty and the request is not accepted, how can I ignore this and update only the data that is not empty?
MySQL doesn’t support (?)
COALESCE() solved my problem)
How can I use mySQL to store data filled used HTML
I have a request:
UPDATE category
SET name = (?) , title = (?), image = (?)
WHERE id = (?)
Instead of (?) I substitute values, but sometimes they can be empty and the request is not accepted, how can I ignore this and update only the data that is not empty?
Use bound parameters and null value indicators in the API.
This query is candidate for garbage can anyway die to its SQL injection prone
Hello people,
I am trying to learn MySQL on my own. I got stuck about something, it is clear that I miss one easy/obvious thing.
https://www.mysqltutorial.org/mysql-subquery/
Here is the original example that I try to complicate in order to improve my learning process.
In this example, it can print full name with offices codes, that’s fine but, I want to import names from offices table to print with it.
Here is code that work for fullname, and code for the next step I tried and does not work.
Sorry for my lacking English, I do not want to make any of you guys blind 😂
I am trying to learn MySQL on my own. I got stuck about something, it is clear that I miss one easy/obvious thing.
https://www.mysqltutorial.org/mysql-subquery/
Here is the original example that I try to complicate in order to improve my learning process.
In this example, it can print full name with offices codes, that’s fine but, I want to import names from offices table to print with it.
Here is code that work for fullname, and code for the next step I tried and does not work.
Sorry for my lacking English, I do not want to make any of you guys blind 😂
Subqueries are not needed for this, at all.
Forget about subqueries so far.
Use JION.
Your join in the query is incorrect, learn how to write simple join and correct it.
Forget about subqueries so far.
Use JION.
Your join in the query is incorrect, learn how to write simple join and correct it.
The example also contains the subqueries, so I also want to use subqueries too. But thanks for your suggestion, I will check the JOIN again.