Centific SQL Developer Interview Questions and Answers

Q1. Explain about SSIS Architecture
Ans. 
SSIS Architecture is a platform for data integration and workflow applications.
• SSIS stands for SQL Server Integration Services

• It includes a data flow engine, control flow engine, and event handling

• SSIS packages can be created using SQL Server Data Tools (SSDT)

• SSIS packages can be scheduled and executed using SQL Server Agent
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Q2. How to implement transactions in ssis
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Transactions in SSIS can be implemented using the TransactionOption property in Control Flow tasks.
• Set the TransactionOption property to Required on the Control Flow tasks that need to be included in the transaction.

• Use the TransactionOption property to specify the level of transaction support needed for each task.

• Transactions can be managed using the Distributed Transaction Coordinator (DTC) service.
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Q1. How to insert multiple values in one go
Ans. 
Use the INSERT INTO statement with multiple value sets separated by commas
• Use the INSERT INTO statement followed by the table name

• List the column names in parentheses after the table name

• Use the VALUES keyword followed by multiple value sets in parentheses, separated by commas

• Example: INSERT INTO table_name (column1, column2) VALUES (value1, value2), (value3, value4)
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Q2. Update query using joins
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Update query using joins in SQL
• Use UPDATE statement with JOIN clause to update data in multiple tables

• Specify the tables to be updated and joined using ON clause

• Set the columns to be updated in SET clause
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Simple coding not that much tough

Q1. Question related to your skills
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Q2. Just basic questions
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Q1. Why u want to join
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Q1. Write a query to display the highest salary
Ans. 
Query to display the highest salary in a table
• Use the SELECT statement to retrieve data

• Use the MAX() function to find the highest salary

• Specify the column name for salary in the query
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Q2. Stored proceduers,functions,cursors triggers,
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Performance tunning and sql profiler

Q1. Types of Indexes
Ans. 
Types of indexes include clustered, non-clustered, unique, composite, and filtered indexes.
• Clustered indexes physically reorder the data in the table based on the index key.

• Non-clustered indexes create a separate structure for the index, pointing back to the original table data.

• Unique indexes ensure that no two rows have the same values in the indexed columns.

• Composite indexes are created on multiple columns to improve...read more
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Q2. Sceanrio based question
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Q1. Salary discussion
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Q2. Joining date and last working date
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Profit and loss,percentage

Q1. Why do you this job ?
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Q2. How can i believe you are the best to our company?
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Q1. About sql and roles and responsibilities
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Q2. What is sql ? What are joins ?
Ans. 
SQL is a programming language used to manage and manipulate relational databases. Joins are used to combine data from multiple tables.
• SQL stands for Structured Query Language

• It is used to create, modify, and query databases

• Joins are used to combine data from two or more tables based on a related column

• Types of joins include inner join, left join, right join, and full outer join

• Example: SELECT * FROM table1 INNER JOIN t
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Q3. What are set operators ?
Ans. 
Set operators are used to combine the result sets of two or more SELECT statements.
• Set operators include UNION, UNION ALL, INTERSECT, and EXCEPT.

• UNION combines the results of two SELECT statements and removes duplicates.

• UNION ALL combines the results of two SELECT statements and includes duplicates.

• INTERSECT returns only the common rows between two SELECT statements.

• EXCEPT returns only the rows from the first SELECT st...read more
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Q4. What are constraints?
Ans. 
Constraints are rules that are applied to a table column or a group of columns.
• Constraints ensure data accuracy and consistency in a database.

• They can be used to enforce rules like uniqueness, primary key, foreign key, etc.

• Constraints can be added when creating a table or altered later using ALTER TABLE statement.

• Examples of constraints include NOT NULL, CHECK, UNIQUE, PRIMARY KEY, FOREIGN KEY, etc.
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