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How to create a MySQL hierarchical recursive query?

I have a MySQL table like this: id name parent_id19 category 1020 category 21921 category 32022 category 421.....

From [MySQLdiscussion group] 2023-08-23 21:55:29 0  1  682

How to connect to my http://localhost web server from Android emulator

How can I connect it to a localhost web server page located at http://localhost or http://127.0.0.1 in Android...

From [MySQLdiscussion group] 2023-08-23 21:31:00 0  2  915

How to return pivot table output in MySQL?

If I have a MySQL table that looks like this: company_nameactionpagecount ----------------------------------Co...

From [MySQLdiscussion group] 2023-08-23 20:25:28 0  2  527

SELECTING with multiple WHERE conditions on the same column

Okay, I think I might be overlooking something obvious/simple here... but I need to write a query that only re...

From [MySQLdiscussion group] 2023-08-23 19:08:16 0  2  554

PHP connection failed: SQLSTATE connection refused

I'm trying to use PHP connection to connect to a MySQL database on phpmyadmin. Nothing special about the conne...

From [MySQLdiscussion group] 2023-08-23 18:49:26 0  2  797

MySQL Error 2006: The mysql server has disappeared

I'm running a server at my office to process some files and report the results to a remote MySQL server. The f...

From [MySQLdiscussion group] 2023-08-23 17:47:00 0  2  809

MySQL: How to reset or change the MySQL root password?

How to change MySQLroot password and username in ubuntu server? Do I need to stop the mysql service before mak...

From [MySQLdiscussion group] 2023-08-23 17:20:27 0  2  644

How to perform FULL OUTER JOIN in MySQL?

I want to perform a full outer join in MySQL. is it possible? Does MySQL support full outer joins?

From [MySQLdiscussion group] 2023-08-23 15:16:38 0  2  686

The reason a column is not valid in the select list is that it is not included in an aggregate function or GROUP BY clause

I'm getting an error - Column "Employee.EmpID" is not valid in the select list because it is not inc...

From [MySQLdiscussion group] 2023-08-23 14:36:31 0  2  819

PDOException "Driver not found"

I just installed DebianLenny with Apache, MySQL and PHP and I'm getting a PDOException Unable to find the driv...

From [MySQLdiscussion group] 2023-08-23 14:42:38 0  2  691

Error 1452: Unable to add or update child row: foreign key constraint failed

I created the table in MySQLWorkbench as follows: ORDRE table: CREATETABLEOrdre(OrdreIDINTNOTNULL,OrdreDatoDAT...

From [MySQLdiscussion group] 2023-08-23 13:28:57 0  1  686

How to rename a MySQL database (change schema name)?

How to quickly rename a MySQL database (change its schema name)? Normally I just dump the database and re-impo...

From [MySQLdiscussion group] 2023-08-23 13:09:22 0  2  725

Using PHP's "Caution: undefined variable", "Caution: undefined index", "Warning: undefined array key" and "Caution: undefined offset"

I'm running a PHP script and continue to receive errors like this: NOTE: Undefined variable: my_variable_name ...

From [MySQLdiscussion group] 2023-08-23 11:45:50 0  2  848

From inside a Docker container, how do I connect to the machine's localhost?

I have an Nginx running inside a docker container. I have a MySql running on the host system. I want to connec...

From [MySQLdiscussion group] 2023-08-23 11:55:48 0  2  844

SQL select only rows with maximum value on column

I have this document table (here is a simplified version): id to content 11...21...12...13... How to select on...

From [MySQLdiscussion group] 2023-08-23 11:08:57 0  2  523