Lycatech Services Production Support Analyst Interview Questions, Process, and Tips

Q1. Self intro and about family remaining questions from sql what are joins and their types
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Q2. What are data types
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Data types are classifications of data that determine the type of values that can be stored and manipulated.
• Data types define the characteristics of data such as size, range, and operations that can be performed on them.

• Common data types include integers, floating-point numbers, strings, booleans, and arrays.

• Examples: int age = 25, float salary = 5000.50, string name = 'John Doe', bool isEmployed = true, int[] numbers
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Q3. What is stored procedure
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A stored procedure is a precompiled set of SQL statements that can be executed on demand.
• Stored procedures are stored in a database and can be called by applications or other stored procedures.

• They are used to encapsulate and execute complex logic or tasks.

• Stored procedures can accept input parameters and return output parameters or result sets.

• They improve performance by reducing network traffic and optimizing query e...read more
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Q4. Differentiate TRUNCATE , DROP , DELETE
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TRUNCATE, DROP, and DELETE are SQL commands used to remove data from a table, but they differ in their functionality.
• TRUNCATE is a DDL command that removes all rows from a table, but keeps the structure intact.

• DROP is a DDL command that removes an entire table, including its structure and data.

• DELETE is a DML command that removes specific rows from a table based on a condition.

• TRUNCATE is faster than DELETE as it doesn...read more
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Q5. What are all the clauses available in sql
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SQL clauses are used to perform specific actions in a SQL query.
• SELECT: retrieves data from a database

• FROM: specifies the table(s) to retrieve data from

• WHERE: filters the data based on specified conditions

• GROUP BY: groups the data based on specified columns

• HAVING: filters the grouped data based on specified conditions

• ORDER BY: sorts the data based on specified columns

• JOIN: combines rows from multiple tables based on re...read more
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Q6. What is primary key
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A primary key is a unique identifier for a record in a database table.
• Primary key ensures each record in a table is unique.

• It is used to establish relationships between tables.

• Primary key can be a single column or a combination of columns.

• It enforces data integrity and allows efficient data retrieval.

• Examples of primary keys include social security numbers, email addresses, etc.
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