Sql keys play a very important role in database related task in sql like retrieve data/record from the table according to the requirement. a key can be defined as a single or combination of multiple ...

Shelley Doll finishes her coverage of SQL data types with an overview of datetime and interval data types. Learn more about the basic syntax of these standard SQL types.

My post earlier this year on enabling query folding when using SQL queries as a data source in Power Query provoked a lot of interest. This post adds one more useful detail: how to preserve the ...

Review the implicit and explicit data type conversions between Python and SQL Server in data science and machine learning solutions. This article lists the supported data types, and the data type ...

Now, this app uses surrogate keys extensively (Django doesn't allow composite primary keys and encourages the use of surrogates heavily). For the first migration scripts I've tentatively skipped ...