Functions

Ranga Babu
Data check

SQL Foreign key

April 5, 2019 by

In this article let us review different ways to create a SQL foreign key, rules on updates and deletes, enabling foreign key constraints, disabling foreign key constraints and not for replication in foreign keys.

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Rajendra Gupta
SQL Case Statement

CASE statement in SQL

April 1, 2019 by

The case statement in SQL returns a value on a specified condition. We can use a Case statement in select queries along with Where, Order By and Group By clause. It can be used in Insert statement as well. In this article, we would explore CASE statement and its various use cases.

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Esat Erkec

SQL Convert Function

January 29, 2019 by

In this article, we will discuss and learn basics and all details about SQL Server data type converting operations and also we will review the SQL CONVERT and TRY_CONVERT built-in functions with various samples. At first, we will explain and clarify syntax of the SQL CONVERT function and then we will learn how can we make data converting process numerical and date/time data types to character data.

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Sifiso W. Ndlovu

An MDS Driven Approach to a Turnaround Time Calculation in SQL Server

November 30, 2018 by

One calculation that you are almost guaranteed to have to produce in your career as a T-SQL developer relates to the calculation of a turnaround time. This is often a key KPI for measuring the performance of both individuals and teams, particularly when the business operates within a service-oriented sector i.e. customer support, transportation, healthcare etc. Turnaround time calculation does not only refer to business metrics rather any activity (i.e. ordering a pizza) with a recorded start and an end time can have its own turnaround time calculated. In this article we evaluate different options for calculating a turnaround time including using DATEDIFF function, creating your own user-defined function (UDF) as well as an integration with SQL Server Master Data Services.

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Rajendra Gupta
SQL Server 2019 columnstore index execution plan

Columnstore Index Enhancements – Index stats update in clone databases

November 9, 2018 by

SQL Server was launched in 1993 on WinNT and it completed its 25-year anniversary recently. SQL Server has come a long way since its first release. At the same time, Microsoft announced a preview version of SQL Server 2019. SQL Server 2019 provides the ability to extend its support to big data, Apache Spark, Hadoop distributed file system (HDFS) and provides enhancements to database performance, security, new features, and enhancements to SQL Server on Linux.

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