There is some nasty error that you can get in this sql query.
The error should be something like this:
Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given in
The correct statement is this:
1 2 | mysqli_query($connection, "SELECT * FROM table where id = 1 group by column_name order by id ASC LIMIT 50");
while {} |
By default, you might think the statement is this:
2 | SELECT * FROM table group by column_name where id = 1... |
That will trigger an error.
The statement will only work if you don’t put any where clause.
To optimize, you can select only certain columns.
3 4 | mysqli_query($connection, "SELECT column_name1, column_name2 FROM table where id = 1 group by column_name1 order by id ASC LIMIT 50");
while {} |
If you have any questions, leave in the comments.