Useful tips for everyday
Can a table have two foreign key columns? (One of them referenced two others, one at a time.) So, the referencing table had two foreign…
What does the apply operator do? The APPLY operator allows you to join two table expressions; the right table expression is processed every time for…
How can I tell how many cores SQL Server is actually using? Search “Microsoft SQL Server 2012 Licensing Guide” if further information is necessary. Example…
What should I do if my PostgreSQL install failed? Firstly, uninstall any failed installations. Use the Control Panel or the PostgreSQL installer in the install…
How do I connect SQL Server Management Studio to PowerShell? One way to figure out if your computer can reach a SQL database and that…
Why is my SQL Server not starting? Reason # 2:Startup parameters have incorrect file path locations. This is another common cause of SQL Server Service…
How do I know if my Autovacuum is working? select count(*) from pg_stat_activity where query like ‘autovacuum:%’; in collectd to know how many autovacuum are…
How to add members to a replica set in MongoDB? A new MongoDB system capable of supporting your data set, accessible by the active replica…
How do I update my pgAdmin version? What I suggest to you is go to control panel and uninstall from there all the versions you…
How many columns we can create in Oracle 12c? 1,000 columns There’s a hard limit of 1,000 columns per table in Oracle Database. So you…