Database development

Esat Erkec

How to use JSON data in SSRS

November 6, 2018 by

In this article, we will explore the concept of using JSON data in SQL Server Reporting Services (SSRS). This usage concept will include a different approach than the usual methodologies because we will take advantage of SQL Server R service support.

What is JSON?

JSON is an abbreviation for JavaScriptObjectNotation. The main purpose of JSON data was to provide data transfer between server and web applications for JavaScript but today’s JSON is the most popular data interchange format. JSON offers two advantages to us. These are; light-weight text based format easily readable by humans. Currently, JSON is not only used in JavaScript applications, it is also used in all popular software programing languages like JavaScript, C++, C#, Perl, Java, Python, Php etc.

Read more »
Prashanth Jayaram

SQL date format Overview; DateDiff SQL function, DateAdd SQL function and more

October 31, 2018 by

SQL date format functions like the DateDiff SQL function and DateAdd SQL Function are oft used by DBAs but many of us never took the time to fully understand these extremely useful features. For professionals just getting started with SQL Server, these functions are some of the first to become familiar with. So hopefully this article will have a little something for everyone across the skill spectrum

Read more »
Rajendra Gupta
Data truncation error

SQL truncate enhancement: Silent Data truncation in SQL Server 2019

October 31, 2018 by

In this article, we’ll take a look into SQL truncate improvement in SQL Server 2019.

Data inserts and updates are a normal and regular task for the developers and database administrators as well as from the application. The source of the data can be in multiple forms as if direct insert using T-SQL, stored procedures, functions, data import from flat files, SSIS packages etc.

Read more »
Rajendra Gupta
Execute DMV query sys.dm_db_database_page_allocations to get page details

SQL Server 2019 – New DMF sys.dm_db_page_info

October 22, 2018 by

Microsoft released preview of SQL Server 2019 recently in Ignite 2018. With every release of SQL Server is enriched with new dynamic management view and functions along with enhancements to existing features.

In this article, we will view the newly introduced dynamic management function (DMF) sys.dm_db_page_info and explore the different scenarios around it.

Read more »
Prashanth Jayaram

Overview of the SQL Insert statement

October 16, 2018 by

This article on the SQL Insert statement, is part of a series on string manipulation functions, operators and techniques. The previous articles are focused on SQL query techniques, all centered around the task of data preparation and data transformation.

Read more »
Prashanth Jayaram

Static and Dynamic SQL Pivot and Unpivot relational operator overview

October 12, 2018 by

In this article, we’ll walk-through the SQL Pivot and SQL Unpivot operators and how they can be useful to transpose SQL Server data. Also, we’ll discuss both static and dynamic ways to use PIVOT and UNPIVOT relational operators that can be used to transform aggregated distinct values as column(s) in the result-set by specifying all the column values in the PIVOT IN clause.

Read more »
Prashanth Jayaram

Overview of the SQL Update statement

October 8, 2018 by

In this article, we’ll walk-through the SQL update statement to modify one or more existing rows in the table. 

In order to modify data in a table, we’ll use an Update statement, a DML (data manipulation language) statement. A SQL update statement comes with a SET clause where we define the column-and-value as a pair of items. In addition, you can enforce the conditional clause. In order to limit the number of rows, we’ll need to set up a where clause. The condition is defined in the where clause that identifies what rows to modify in the table.

Read more »
Prashanth Jayaram

Overview of the SQL LIKE Operator

October 2, 2018 by

In this article, we are going to learn how to use the SQL LIKE operator, in SQL Server, using regular expressions to find and/or manipulate text. We will start by learning the symbols and basic syntax of using wildcard regular expressions. We will use character sets and repetition expressions to create flexible matching patterns, and along the way, we’ll examine different ways to use the LIKE operator. And then, finally, in the latter part of the section, we will explore some of the most common and most useful regular expression examples.

Read more »
Prashanth Jayaram

SQL Join overview and tutorial

September 17, 2018 by

The ability to combine results from related rows from multiple tables is an important part of relational database system design. In SQL Server, this is accomplished with the SQL join clause.  It’s the nature of traditional relational database systems where some table contains information related to other tables with a common key value. Using a SQL join, you can easily perform queries on related data-sets from multiple tables with these shared keys.

Read more »
Bojan Petrovic

Querying data using the SQL Case statement

September 12, 2018 by

The Case statement in SQL is mostly used in a case with equality expressions. The SQL Case statement is usually inside of a Select list to alter the output. What it does is evaluates a list of conditions and returns one of the multiple possible result expressions.

Read more »