Interview Question of the Week #047 – Logic To Find Weekdays Between Two Dates

I often enjoy seeing interview questions where the contestant has to write SQL Scripts. Here is another such example. Question: How to find weekdays between two dates? Answer: Here is a function which can be used to find weekdays between two dates. CREATE FUNCTION dbo.getDayCount(@startdate date, @enddate date) RETURNS INT…
Read More

Interview Question of the Week #046 – How @@DATEFIRST and SET DATEFIRST Are Related?

Question: How @@DATEFIRST and SET DATEFIRST are related? Answer: The master database’s syslanguages table has a DateFirst column that defines the first day of the week for a particular language. SQL Server with US English as default language, SQL Server sets DATEFIRST to 7 (Sunday) by default. We can reset any day…
Read More

Interview Question of the Week #045 – How to Do Case Sensitive Search?

One of my popular questions which helps me to understand lots of understanding of SQL by SQL developer. Question: How doing a case sensitive search in SQL Server? Answer: If Column1 of Table1 has following values ‘CaseSearch, casesearch, CASESEARCH, CaSeSeArCh’, following statement will return you all the four records. SELECT…
Read More

Interview Question of the Week #044 – What is the difference of performance between SELECT and SET?

Question: What is the difference of performance between SELECT and SET? Answer: SELECT : Designed to return data. SET : Designed to assign values to local variables. While testing the performance of the following two scripts in query analyzer, interesting results are discovered. SET @foo1 = 1; SET @foo2 =…
Read More