Data types

Ahmad Yaseen

SQL Server Data Type Conversion Methods and performance comparison

October 3, 2017 by

When you define SQL Server database tables, local variables, expressions or parameters, you should specify what kind of data will be stored in those objects, such as text data, numbers, money or dates. This attribute is called the SQL Server Data Type. SQL Server provides us with a big library of system data types that define all types of data that can be used with SQL Server, from which we can choose the SQL Server data type that is suitable for the data we will store in that object. You can also define your own customized user defined data type using T-SQL script. SQL Server data types can be categorized into seven main categories:

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Sifiso Ndlovu

SQL Server pivoting on non-numeric data types

February 19, 2016 by


In the article, Multiple Options to Transposing Rows into Columns, I covered various options available in SQL Server to rotating a given row into columns. One of the options included the use of a PIVOT relational operator. The mandatory requirement of the operator is that you must supply the aggregate function with only a numeric data type. Such a mandatory requirement is usually not an issue as most aggregations and subsequent pivoting is performed against fields of numeric data type. However, sometimes the nature of business reporting requests may be such that you are required to cater for pivoting against non-numeric data types. In this article we take a look at how you can deal with such requirements by introducing a workaround to pivoting on non-numeric fields.

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