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Sql interview questions & Answers

List of Topics

Sql Interview questions

  • What Is The Difference Between Sql And Mysql Or Sql Server?

    SQL or Structured Query Language is a language; language that communicates with a relational database thus providing ways of manipulating and creating databases. MySQL and Microsoft’s SQL Server both are relational database management systems that use SQL as their standard relational database language.

  • What Is The Difference Between Sql And Pl/sql?

  • What Is A Database?

  • What Are Tables And Fields?

  • What Are The Specific Uses Of Sql Functions?

  • What Are The Case Manipulation Functions Of Sql?

  • What Are The Types Of Join And Explain Each?

  • What Is Normalization?

  • What Is The Purpose Of The Nvl Function?

  • What Is The Use Of The Nullif Function?

  • What Is The Difference Between Cross Joins And Natural Joins?

  • What Is The Purpose Of Dml Statements In Sql?

  • What Are The Types Of Sub Query?

  • What Is A Stored Procedure?

  • What Is A Trigger?

  • What Is The Difference Between Delete And Truncate Commands?

  • What Are Local And Global Variables And Their Differences?

  • What Is A Constraint?

  • What Is Data Integrity?

  • What Is Auto Increment?

  • What Is Datawarehouse?

  • What Is Self-join?

  • What Is Cross-join?

  • What Is User Defined Functions?

  • What Are All Types Of User Defined Functions?

  • What Is Collation?

  • Advantages And Disadvantages Of Stored Procedure?

  • How Do You Copy Rows From One Table To Another?

  • What Happens If You Omit The Where Clause In The Update Statement?

  • Can You Modify The Rows In A Table Based On Values From Another Table? Explain.

  • What Is Sub Query?

  • What Is A Query?

  • What Is A Relationship And What Are They?

  • What Is A Cursor?

  • What Are All The Different Types Of Indexes?

  • What Is An Index?

  • What Is A View?

  • What Is De Normalization?.

  • What Is The Purpose Of The Merge Statement In Sql?

  • What Is The Difference Between Varchar2 And Char Datatypes?

  • Which Sql Statement Is Used To Add, Modify Or Drop Columns In A Database Table?

  • Can You Remove Rows From A Table Based On Values From Another Table? Explain.

  • Can You Sort A Column Using A Column Alias?

  • Which Statement Is Used To Add A New Row In A Database Table?

  • What Are All The Different Normalizations?

 

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