Hey Folks,
Better later than never… Yesterday was the first day of the Microsoft Ignite event, and again, like last year, you have a chance to earn a voucher to do a free certification exam.
Same as the last year, to receive the voucher all you have to do is complete at least one of the challenges.
Bellow, you have two links. One where you can see which Exams will be available and the other one will take you to the challenges page.
So, have you ever been in the need to drop a user from the SQL Server database, but you stuck with the following related error?
Error: 15138 The database principal owns a schema in the database, and cannot be dropped.
If you don’t have access to the SSMS to see which schema or objects the user owns, the following SQL should do the job.
USE [DATABASENAME] GO SELECT so.name OBJECT, su.name OWNER FROM sys.schemas so INNER JOIN sysusers su ON (so.principal_id = su.uid) WHERE su.name = 'username' GO SELECT so.name OBJECT, su.name OWNER, so.xtype TP FROM sys.sysobjects so INNER JOIN sysusers su ON (so.uid = su.uid) WHERE su.name = 'username' GO
Once you have the owned objects/schemas, you can change them with the following SQL (schema example):
USE [DATABASENAME] GO ALTER AUTHORIZATION ON SCHEMA::[db_datareader] TO [newowner] /* new owner username */ ALTER AUTHORIZATION ON SCHEMA::[db_datawriter] TO [newowner] GO
Then you’re ready to drop the user DROP USER [username].
Bonus SQL: The following will list the schemas and their owner.
SELECT schema_name(schema_id) as SCHEMANAME, user_name(s.principal_id) as USERNAME FROM sys.schemas AS s
From time to time, I get a customer request to configure/optimize a MySQL server, and usually, when the customer has already installed the MySQL Server, usually, it’s an “old” version. It’s ok if your software uses features that only work on some specific version of a Database, but keep an eye open for its end of life support. And that EOF is coming to MySQL 5.6. Below you can see a table with the MySQL versions and their ending date.
So, next time you need to configure a new server, keep an eye on the version you’re using.
| Version | Ending date |
|---|---|
| 5.6 | 02/05/2021 |
| 5.7 | 10/21/2023 |
| 8.0 | 04/xx/2026 |
Hey folks,
have you ever received a call for a MySQL on windows that stopped working after someone did something at their my.cnf? Then you try to start the service by cmd and get the following error.
mysqld: [ERROR] Found option without preceding group in config file C:\ProgramData\MySQL\MySQL Server 8.0\my.ini at line 1.
mysqld: [ERROR] Fatal error in defaults handling. Program aborted!
Well, for some reason, the editor that was used (no idea which one was), threw some random byte at the beginning of the file. To solve that (on windows at least), open the file on Notepad++, go to Format > Convert to ANSI. Save the file and start again the service.
What was the weirdest thing that happened to you on a Windows Server?
Hey Folks,
A few months ago, I found an issue, where, for some reason, someone ignored the warnings and tried to restore a backup from a different version of MySQL (or even MariaDB, IDK). And as a result, half the database was running without Primary Keys. So when a system was trying to update their schema, we were getting errors (like the error bellow) trowed at our face.
1075 - Incorrect table definition; there can be only one auto column and it must be defined as a key
Ok, first things first, you would like to run an ALTER TABLE TABLE_NAME_HERE
ADD PRIMARY KEY (ID); and see if it works. The error was being thrown because the table key doesn’t have a single index on it… if you have problems with duplicated records on it, you can try the following script to solve the issue.
First, get the max id from the table, and then run the following:
UPDATE TABLE_NAME_HERE JOIN (SELECT @sequence := MAX_ID_HERE ) r SET id=@sequence:=@sequence+1 where id= DUPLICATED_ID_HERE;
WARNING
Be aware that, if the rows that were duplicated, where referenced as FK on another table, you will get some headache (well, you already have problems…) !!
Have you ever tried to do a MySQL replication at a different timezone/SO and got the following error message at SHOW REPLICA STATUS? Well, there are two ways to solve this, Error ‘Unknown or incorrect time zone: ‘America/Cuiaba” on query. Default database: ‘glpi_tiab’. Query: ‘BEGIN’
If you are on Linux, you can run the following and solve the problem (after a restart of the service).
$ mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -u root mysql -p
On Windows, I found it to be easier if you download the timezone instead of build/import your own. You can download from here https://dev.mysql.com/downloads/timezones.html.
use mysql;
source /path/to/file/timezone_posix.sql;
Well, that’s it for today. See ya.
Have you ever been in the need to retrieve the SQL Server version that was used on a backup file?
Well, if for some weird reason that happens to you, the following SQL can help you. It won’t restore the database, it’ll just retrieve some basic info about it.
With that, you’ll have the DatabaseVersion (Internal Number Version) where the backup was from. You can also grab some useful information like the Server Name, Creation Date, and more.
RESTORE HEADERONLY FROM DISK = N'b:\backup\data_backup.bak'
Below we have a table of Versions x Internal Number.
| Version | Internal Number Version | Compat. Level |
|---|---|---|
| SQL Server 2019 | 895 – 904 | 150 |
| SQL Server 2017 | 868 – 869 | 140 |
| SQL Server 2016 | 852 | 130 |
| SQL Server 2014 | 782 | 120 |
| SQL Server 2012 | 706 | 110 |
I hope it helps!
Hi folks,
You usually receive notifications from SQLServer at your e-mail, right? A nice way to receive updates from your SQL Server Schedule job, it’s sending them through telegram. To do so, you’ll have to configure one additional step and choose Operating System (CmdExec) as a type of command. And to call the Telegram API, we can use a PowerShell command like the following:
powershell "Invoke-RestMethod -Uri 'https://api.telegram.org/bot{API-KEY}/sendMessage?chat_id={CHAT-ID}&text={TEXT}'"
Just replace the following keys with the proper value (don’t forget to remove the curly brackets too).
API-KEY: Your bot API key
CHAT-ID: The ID of the chat where you’ll receive the message, could be a single user, or a chat group
TEXT: Your beloved message.
What else do you use to achieve this kind of alers? Slack? healthchecks.io? Tell us 😉
Hey folks,
Do you enjoy learning new things? Between September 22 and September 24, Microsoft will be hosting their yearly Microsoft Ignite event. Of course, it’ll be online this time and free of charge :).
This year, you can earn a certification voucher and that’s awesome. You’ll be able to choose one certification from a specific list. Check the list of available certifications and the Terms and Conditions accessing the following link: https://docs.microsoft.com/pt-br/learn/certifications/microsoft-ignite-cloud-skills-challenge-2020-free-certification-exam.
Hey folks,
Bcaching_sha2_password and it’s the default auth plugin now. Here is the list of compatible connectors to check if your app is ok with that or if you should call the dev team.
Example: If, for some reason, you get stuck with the following error (PHP sample), you have to do a few changes.
Connect Error: SQLSTATE[HY000] [2054] The server requested authentication method unknown to the client
default-authentication-plugin with mysql_native_password value, restart the server and set the password again with the following command.
Config File:
[mysqld] /... other configs .../ default-authentication-plugin=mysql_native_password
SQL:
ALTER USER 'adv'@'localhost' IDENTIFIED WITH mysql_native_password BY '1AB@8CD#E91F22!';
So, look out before just doing a update on your server, or you could break your app 😉