Cognitive Platform Solutions SQL Developer Interview Questions and Answers

Q1. What is sql , index , stored proc , triggers
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Q1. Project in SQL developer
Ans. 
A project in SQL developer involves designing, implementing, and maintaining databases for various applications.
• Understand project requirements and design database schema accordingly

• Write efficient SQL queries to retrieve and manipulate data

• Optimize database performance by indexing, normalization, and query tuning

• Collaborate with developers and stakeholders to ensure database meets project needs
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Q2. Types of sql, explain briefly
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Types of SQL include DDL, DML, DCL, and TCL.
• DDL (Data Definition Language) - used to define the structure of database objects (CREATE, ALTER, DROP)

• DML (Data Manipulation Language) - used to manipulate data in database objects (SELECT, INSERT, UPDATE, DELETE)

• DCL (Data Control Language) - used to control access to data (GRANT, REVOKE)

• TCL (Transaction Control Language) - used to manage transactions (COMMIT, ROLLBACK)
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They asked to do installation

Q1. Joins in sql server
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Q2. Set operator in sql
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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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Q1. Technical discussion
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Q1. Manager round and technical discussion
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Q1. Selection processs
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Q1. Write a query to display the highest salary
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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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Q1. Types of Indexes
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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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