Useful tips for everyday
How do you avoid duplicates in Teradata? Teradata Removing Duplicates From Table Approach 1: By create a new table and rename it as main table.…
Is the Index Maintenance default good for Ola Hallengren? However, the index maintenance defaults aren’t good for everyone. Here’s how they ship: CREATE PROCEDURE [dbo].…
Why does left join increase number of rows? If there are matches though, it will still return all rows that match, therefore, one row in…
What does nullable mean in SQL? Nullable means it can have a null value, thus not required. IS NULL bad in SQL? 33 Answers. Nulls…
Are inner joins slower? In fact, it’s slower; by definition, an outer join ( LEFT JOIN or RIGHT JOIN ) has to do all the…
Can you downgrade SQL Enterprise to standard? There is no direct method you have to uninstall enterprise and install standard. You need to backup user…
What is Repmgr in Postgres? repmgr is an open-source tool suite for managing replication and failover in a cluster of PostgreSQL servers. It enhances PostgreSQL’s…
What is a local account administrator? In Windows, a local administrator account is a user account that can manage a local computer. Generally, a local…
What does a histogram in your look like? Introduction to Histogram in R The histogram in R is one of the preferred plots for graphical…
Why do we shuffle in MapReduce? Shuffling can start even before the map phase has finished, to save some time. That’s why you can see…