The ‘SQL Server’ Archives
Posted December 16, 2018 by

How To Use Case Statement In Order By Clause

Case Statement In Order By

A CASE statement is an expression to evaluate different conditions and return a scalar value when a condition is met. If none of the condition evaluated to TRUE it will return a value from ELSE block which is optional. ORDER BY clause used to sort the values in either ascending or descending order. A practical […]

Category Database, SQL Server

Posted December 15, 2018 by

How To Use FIRST_VALUE & LAST_VALUE Function In SQL Server

Case Statement In Order By

SQL Server 2012 version has ended a drought of insufficient analytical functions in SQL Server. Analytical functions like LEAD, LAG, FIRST_VALUE and LAST_VALUE that made querying and reporting easy – especially in the Business Intelligence domain. Performing analytical operations before these functions was a tedious task; Writing complex queries needed nested queries and self-joins resulting […]

Category Database, SQL Server

Posted December 3, 2018 by

Beginner’s Guide To Dynamic Data Masking In SQL Server

Case Statement In Order By

Dynamic Data Masking (DDM), a valuable feature added in SQL Server 2016. Hiding sensitive data from unauthorized users is achievable using DDM. Most importantly, Masking of data and encryption are two different ways of securing data. Dynamic Data Masking uses different strategies to hide data – benefiting by not modifying stored data as Encryption feature […]

Category Database, SQL Server

Posted November 26, 2018 by

How To Use STRING_AGG – Concat Multiple Row Values In SQL Server

Case Statement In Order By

Concat multiple row values in SQL Server is a well-known familiar problem. Every database developer happened to write concatenation string queries for reporting or general purpose. Numerous methods including XML PATH, COALESCE function, Recursive CTE been used to achieve desired results.

Category Database, SQL Server

Posted November 25, 2018 by

NULLIF – TSQL Function in SQL Server

Case Statement In Order By

NULLIF is a function applied to return a NULL value if specified two expressions (expression1= expression2) are equal. NULLIF function is an ANSI function, it is available with other RDBMS vendors like ORACLE, MySQL, Postgres and among others. NULLIF Function can be useful in cases when applications are using different indicators to represent a Missing […]

Posted November 23, 2018 by

TRY…CATCH Error & Exception Handling in SQL Server

Implementing acceptable Error Handling logic in T-SQL code is important to avoid unexpected errors breaking the system. Exception Handling using TRY…CATCH block in Microsoft SQL Server is fairly identical to exception handling in .NET and Java programming languages. Basic Fundamental of TRY…CATCH block is a group of statements can be enclosed in a BEGIN TRY…END […]

Posted November 22, 2018 by

How To Get Last Identity Inserted Value In SQL Server

Case Statement In Order By

IDENTITY property in SQL Server creates an identity type column. It generates auto-incrementing values in table by defining seed and increment values, works much like SEQUENCE object in SQL Server and Oracle. However, IDENTITY property is table dependent and SEQUENCE object works independently from the table.

Category Database, SQL Server

Posted November 18, 2018 by

How To Use DROP IF EXISTS in SQL Server

Case Statement In Order By

SQL Server 2016 edition has included an awe-inspiring feature in Database engine that is DROP IF EXISTS along with a bunch of superior features. Option DROP IF EXISTS is used when we need to verify if an object exists in a database before creating/ dropping it. In this situation, we need to first drop existing […]

Posted June 26, 2017 by

Performance Tip: Avoid Using the SP_ Prefix in Stored Procedures

Case Statement In Order By

Database developers often name stored procedures with the SP_ prefix in SQL Server. The SP_ prefix helps other developers quickly identify an object as a stored procedure. Although there have been many debates over whether or not user created objects should be named with the sp_ prefix following the naming convention standards, we should not […]

Posted June 20, 2017 by

Execute WITH RESULT SETS Feature in SQL Server

Case Statement In Order By

With the introduction of SQL Server 2012, a useful feature was included: EXECUTE WITH RESULT SETS. This feature allows us to modify the column names and column data types of the result sets returned by a stored procedure without actually modifying the stored procedure code.

Posted June 5, 2017 by

Creating an Index with DROP_EXISTING = ON in SQL Server

Creating an index in SQL Server is a moderately simple task that improves the query performance. We can create a clustered as well as a non-clustered index which can be either unique or non-unique as per requirement.

Posted May 29, 2017 by

How to Use the TRY_CAST Function in SQL Server

Case Statement In Order By

The TRY_CAST function in SQL Server is used to cast value from its existing data type to a specified target data type. This occurs only if the operation is successful. It returns NULL if the conversion fails. TRY_CAST is an extended version of the CAST function. This tutorial explains how to use TRY_CAST in SQL […]