Notice that the pivot table is displaying only the data that’s pertinent to our present analysis. On the right-hand side, you’ll find the criteria that Excel used to create it in the ...

Anything else? When the below conditions are met, the above bad case will occur: table with multi-column primary key; the first column of the primary key is varchar; there are a lot of rows with the ...

This issue affects all MySQL >= 8.0.30 where sql_generate_invisible_primary_key is set to ON. When migrating table with non-standard PK (standard in my case is unsigned numeric with auto_increment), ...

Bill Kent’s clever summary of 3NF is “ [every] non-key [attribute] must provide a fact about the key, the whole key, and nothing but the key, so help me Codd.” ...

PDO is PHP Data Objects which is used to connect to any database. Benefit of using PDO is that if there is any problem in our query it has an exception class to handle it. If any exception thrown to ...

When working on a multidimensional design, every fact table within scope should be handled with care. In an ideal world, each low-level fact table represents the metrics related to a business event.