I need to know, given a MySQL SELECT, no matter how complex is and how many tables are joined, if there is a way to get the list of the fields resulting, especially if there are asterisks instead of the…
In the example code below, col1 and col2 are primary keys in the database! My question is: should they be added in the part of the code after the ON DUPLICATE KEY UPDATE, as it is already in the code,…
I am using MySQL and am trying to replace/fill all null values in a column with the previous non-null value present within the same column. I tried using the lag() windows function, but I don't seem to get the expected…
Considering the data-table as below: tags alpha alpha, beta delta beta, gamma How can get all different tags in one query? So the expected result should be: alpha beta gamma delta (order is not important) I have been thinking a…
I have this records: Number 1, 2 1, 24 How to select only 2 by LIKE not 2 and 24 SELECT * FROM test WHERE number LIKE '%2%' 1, 2 // need only this record 1, 24
i am creating a restaurant review website. in my review table i have a foreign key called user_id and idk how to use it to display the username which is in the user table my user table my review table…
i have table structure like this id user_id parent_id club 1 1 club1 2 2 1 club1 3 3 1 club1 4 4 2 club1 5 5 2 club1 6 6 3 club1 7 7 3 club1 8 8 4…
I want to write a SELECT statement, where the tablename is based on the response to a different SELECT query. I can't use stacked queries, and I can only use MySQL. As pseudo-code, this is what I'd like to do:…
Can I get some help with this please...I am getting error like 1) near "VALUES": syntax error I/flutter ( 6415): DatabaseException(near "VALUES": syntax error (code 1 SQLITE_ERROR): , while compiling: INSERT INTO words ( here is my dart model code..it…
I have a request that I need to process multiple time during specific time frames, my implementation is working, but my user base is growing everyday and the CPU load of my database and the time taken to execute the…