Sql interview questions with examples pdf

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Common SQL Interview Questions 2. Practical SQL Query Interview Questions ( SQL Server Queries examples with answers). I don't want to. Here are top 39 objective type sample SQL Interview questions and their answers are given just These sample questions are framed by experts from Intellipaat who trains for SQL Training to give you .. How to store pdf file in SQL Server?. SQL Server. Interview Questions and Answers. For All Database Developers and. Developers Administrators. Pinal Dave. Vinod Kumar.

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SQL Interview Questions with Answers .. analyze later. For example, you can monitor a production environment to see which stored procedures are hampering . Top 60 Advanced SQL Interview Questions And Answers Pdf, You can crack For Example: SELECT column_name(s) FROM table_name WHERE condition;. Top 50 Basic SQL Interview Questions And Answers pdf will mainly contain In the above example, emp refers to alias name for employee table and dept refers .

These tasks are also called as job and are stored with in SQL server. A temp table is a temporary storage structure to store the data temporarily. So, yes it is possible for a stored procedure to call itself. The first three normal forms are usually adequate. What is a Database? Null value is a field with no value.

Null values allowed. Data Integrity defines the accuracy as well as the consistency of the data stored in a database. It also defines integrity constraints to enforce business rules on the data when it is entered into an application or a database.

Database Management System is a collection of programs that enables a user to store, retrieve, update and delete information from a database. To alter existing database objects DROP: To rename database objects.

SQL Interview Questions and Answers for - Intellipaat

Constraints are used to specify the limit on the data type of the table. It can be specified while creating or altering the table statement. The sample of constraints are:. Explain different types of index? There are three types of index namely:. Unique Index: This index does not allow the field to have duplicate values if the column is unique indexed.

If a primary key is defined, a unique index can be applied automatically.

Clustered Index: This index reorders the physical order of the table and searches based on the basis of key values. Each table can only have one clustered index. Non-Clustered Index: Non-Clustered Index does not alter the physical order of the table and maintains a logical order of the data.

Each table can have many nonclustered indexes. There are many successive levels of normalization. These are called normal forms. Each consecutive normal form depends on the previous one. The first three normal forms are usually adequate. Third Normal Form 3NF — Dependent solely on the primary key and no other non-key supporting column value. It is used to ensure that the data transactions are processed reliably in a database system.

Atomicity refers to the transactions that are completely done or failed where transaction refers to a single logical operation of a data.

Interview questions pdf sql with examples

It means if one part of any transaction fails, the entire transaction fails and the database state is left unchanged. Consistency ensures that the data must meet all the validation rules. In simple words, you can say that your transaction never leaves the database without completing its state. Durability means that if a transaction has been committed, it will occur whatever may come in between such as power loss, crash or any sort of error.

Trigger in SQL is are a special type of stored procedures that are defined to execute automatically in place or after data modifications.

It allows you to execute a batch of code when an insert, update or any other query is executed against a specific table.

Arithmetic Operators Logical Operators Comparison Operators Apart from this SQL Interview Questions blog, if you want to get trained from professionals on this technology, you can opt for a structured training from edureka! Skip to content 1. What are properties of the transaction?

Examples pdf interview sql questions with

Explain the working of SQL Privileges? This command is used provide database access to user apart from an administrator. This command is used provide database deny or remove access to database objects. It can be rolled back. The operation cannot be rolled back DROP command removes a table from the database completely. What is Referential Integrity?

Why are SQL functions used? SQL functions are used for the following purposes: To perform some calculations on the data To modify individual data items To manipulate the output To format dates and numbers To convert the data types 8. What do you mean by recursive stored procedure? List some case manipulation functions in SQL? There are three case manipulation functions in SQL, namely: New 51 Machine Learning lnterview questions For example- Select emp.

What are aggregate and scalar functions?

500 SQL Server Interview Questions and Answers - SQL FAQ PDF

What is a Stored Procedure? List some advantages and disadvantages of Stored Procedure? List all the types of user-defined functions? There are three types of user-defined functions, namely: What do you mean by Collation? What are the different types of Collation Sensitivity? Following are the different types of collation sensitivity: You can go to the below steps to change authentication mode in SQL Server: What is a Data warehouse?

What are Local and Global variables? How can you fetch alternate records from a table? When is it used? Learn for free! Subscribe to our youtube Channel. Explain the steps needed to Create the scheduled job? Steps to create a Scheduled Job: Right click on jobs and choose Add New. A New Job window will come into view. Give an associated name for the same.

An SQL job can comprise of one or supplementary schedules. It is basically the instance at which SQL job will jog itself. We can spell out returning schedules also. Become SQL Certified in 16 hrs.

Explain correlated query work? When is the Explicit Cursor Used? Find What is Wrong in this Query? Name some commands that can be used to manipulate text in T-SQL code. For example, a command that obtains only a portion of the text or replace a text string, etc. The starting position is optional. LEN textData — Returns integer value of the length of the string, excluding trailing blanks. STUFF textData, start , length , insertTextData — Deletes a specified length of characters and inserts another set of characters at a specified starting point.

What are the three ways that Dynamic SQL can be executed? Writing a query with parameters. Using EXEC. In what version of SQL Server were synonyms released? How do synonyms work and explain its use cases? Synonyms were released with SQL Server Synonyms enable the reference of another object View, Table, Stored Procedure or Function potentially on a different server, database or schema in your environment.

In simple words, the original object that is referenced in the whole code is using a completely different underlying object, but no coding changes are necessary. Think of this as an alias as a means to simplify migrations and application testing without the need to make any dependent coding changes. Synonyms can offer a great deal of value when converting underlying database objects without breaking front end or middle tier code.

This could be useful during a re-architecture or upgrade project. If you are a SQL Developer, how can you delete duplicate records in a table with no primary key? If so, what are the commands? The bulk copy bcp command of Microsoft SQL Server provides you with the ability to insert large numbers of records directly from the command line. In addition to being a great tool for command-line aficionados, bcp is a powerful tool for those seeking to insert data into a SQL Server database from within a batch file or other programmatic method.

Bulk Insert: Provides ad hoc connection information as part of a four-part object name without using a linked server name. Executes the specified pass-through query on the specified linked server. Linked Servers: Typically linked servers are configured to enable the Database Engine to execute a Transact-SQL statement that includes tables in another instance of SQL Server, or another database product such as Oracle.

What is the native system stored procedure to execute a command against all databases? The alternative is to use a cursor to process specific commands against each database. How do you maintain database integrity where deletions from one table will automatically cause deletions in another table? What port does SQL server run on? Explain with an example? What are the risks of storing a hibernate-managed object in cache? How do you overcome the problems?

What is SQL Profiler? Use SQL Profiler to monitor only the events in which you are interested. What are the implications of having it OFF? In this example, Stuff function replaces the string "Intellipaat" onwards the 3rd position 'nte' with 'abc'. In this example, Replace function replaces the occurrence of each 'bc' string with 'xy'. What is de-normalization in SQL database administration?

Give examples. Materialized views for implementation purpose such as: Linking attribute of one relation with other relations. To improve the performance and scalability of web applications. Buffer Cache: Buffer cache is a memory pool in which data pages are read. The ideal performance of the buffer cache is indicated as: Log Caches: Log cache is a memory pool used to read and write the log pages.

Top SQL Interview Questions And Answers

A set of cache pages are available in each log cache. The synchronization is reduced between log and data buffers by managing log cache separately from the buffer cache.

Describe how to use Linked Server. Expand Server Objects in Object Explorer. Right-click on Linked Servers. Click on New Linked Server. Select General page in the left pane and Type any name for the linked server in the first text box. Select the Other Data Source option. Click on Microsoft Jet 4. Type the full path and file name of the Excel file in Data Source box. Type the Excel version no. Discuss Lahari , says Feb 12, Normalization is a systematic approach of decomposing tables to eliminate data redundancy and undesirable characteristics like Insertion, Update and Deletion Anamolies.

All Rights Reserved. Discuss Puviya, says Feb 10, SQL is basically Structured query language for the processing of data in the query format. A Database Management system consists of a collection of interrelated data and set of programs to access that data. Discuss Jayani Sumudini, says August 10, A Database Management system provides a secure and survivable medium for the storage and retrieval of data.