SQL Server Express has no SQL Server Agent, so nothing runs to delete old backup files and the disk slowly fills. This post gives a PowerShell script that removes backup files older than a set number of days, tests it with a dry run, refuses to delete when any backup type has no recent file, and shows how to schedule it with Task Scheduler.
How to Estimate Space Saved by Data Compression in SQL Server? – Interview Question of the Week #167
How to estimate space saved by data compression in SQL Server? Use the built-in sp_estimate_data_compression_savings procedure. Here is a quick example.
Backup Detected Log Corruption: Context Is Bad Middle Sector
Backup detected log corruption in a client’s database, and every full backup failed at exactly 60 percent. Instead of rebuilding the log, we checked the VLFs and found a log waiting on REPLICATION. Removing the leftover replication fixed the backup.
SQL SERVER – Mirroring Error 1456 – The ALTER DATABASE Command Could not be Sent to the Remote Server Instance
Adding a new witness server after a disaster failed with database mirroring error 1456. Here is one possible cause and what to check.
Renaming a Table With Almost No Downtime Using sp_rename
A rename swaps names in a blink, yet the foreign key and permissions stay with the old table. Here is a short demo and a safer swap.
Collecting Server Hardware Facts Before a Tuning Session
Capture server hardware facts from SQL Server views, keep an inventory, and distinguish visible resources from workload sizing evidence.
![MySQL - Connection Error - [MySQL][ODBC 5.3(w) Driver]Host 'IP' is Not Allowed to Connect to this MySQL Server](https://blog.sqlauthority.com/wp-content/uploads/2018/03/mysql-login-err-04.jpg)
MySQL – Connection Error – [MySQL][ODBC 5.3(w) Driver]Host ‘IP’ is Not Allowed to Connect to this MySQL Server
Setting up a linked server to MySQL, the ODBC test failed: Host ‘IP’ is not allowed to connect to this MySQL server. Here is how I fixed it.