Select Clause

Duration: 5 min

This video lesson is available to enrolled students.

Return to /learn/RSSB-BASIC-COMPUTER-INSTRUCTOR/paper-2-database-management-system/sql/select-where-distinct/asset-select-clause after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. About the Course: About the Course
  2. Paper-1 & 2 | Basic Numeracy: Ratio and Proportion (Ratios), Divisibility Rules, Mixture and Alligation, Permutation and Combination, Logarithm, Number System, HCF LCM, Sequence and Series (Series), Speed Time and Distance, Percentage, Average, Mensuration and Geometry, Age Problems, Arithmetic, Statistics, Probability, Profit and Loss, Simple Interest and Compound Interest, Partnership, Speed Mathematics and Basic Mathematics, Algebra, Powers and Exponents (Surds and Indices), Time and Work, Pipe and Cistern, RSSB Specific Videos - Basic Numeracy
  3. Paper-1 & 2 | Data Interpretation: Data Interpretation
  4. Paper-1 & 2 | General Mental Ability: Mental Ability, RSSB Specific Videos - Mental Ability
  5. Paper-1 & 2 | Logical Reasoning and Analytical Ability: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Syllogisms, Seating Arrangements, Blood Relations, Directions (Direction Test), Analytical Reasoning (Counting Figures Reasoning), Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Venn Diagram, Analogy, Ranking, Order and Sequence, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Data Arrangement, Logical Sequence Of Words, Crypt Arithmetic
  6. Paper-1 & 2 | Decision Making and Problem Solving: Selection Decision Table (Decision Making)
  7. Paper-1 | General Science: Physics, Biology, Chemistry, RSSB Specific Videos
  8. Paper-1 | General Awareness: State Wise GK, GK- Current Affairs
  9. Paper - 2 | Digital Logic Systems: Digital Systems & Boolean Basics, Logic Gates & Hardware, Combinational Circuit, Sequential Circuits
  10. Paper-2 | Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, Relational Calculus, Relational Algebra, SQL, NoSQL
  11. Paper-2 | Data Structures & Algorithms: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Algorithm Analysis, Sorting Algorithms, Intro to Compilers, Hashing
  12. Paper 2 | Data Communication and Network Security: Introduction to CN, Data Communication, Data Link Layer - Ethernet, DLL: Error Control, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Application Layer, Hardware basics, Network Security, Ethical Hacking
  13. Paper-2 | Operating Systems: Introduction to OS, Process Management, Memory Management, File Management, Deadlock
  14. Paper-2 | Computer Organization and Architecture: Basics of COA, Floating Point Rep, Cache Memory Organization, Input Output Organisation, Instr Formats & Modes, Control Unit Design, Register Transfer and Microoperations, Programming the Basic Computer, Number System, Number Representation
  15. Paper 2 | System Analysis and Design: Fundamentals of Systems and Information Systems, Fundamentals of Software Engineering, SDLC and Development Approaches, Software Documentation and Software Requirements Specification (SRS), SDD and Quality Assurance, Security, Risk Management & Maintenance, Software Testing
  16. Paper-2 | C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  17. Paper 2 | OOPS , C++ , JAVA: Language Design, OOPS with C++, Java, .Net Programming, Java Fundamentals
  18. Paper 2 | Python: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis
  19. Emerging Trends and AI: Emerging Tech Trends, Artificial Intelligence
  20. Paper-2 | Data Processing (Ms-Office): MS Office Applications
  21. Paper-2 | Internet and Web Technologies: HTML Basics, CSS, XML, JavaScript-Basics, Internet Fundamentals, Protocols & Services, Web Publishing & Hosting, Server Side & Security, Emerging Technologies, Terms & Abbreviations, Cyber Threats and Malware Attacks, Role of Internet and Web Services, Security in Mobile and Wireless Computing
  22. Paper 2 | Pedagogy: Child Development, Theories, Concept of Pedagogy, Inclusive Education, Experiential Pedagogy, Assessment & Evaluation, Psychology, Curriculum Framework & Reforms, National Education Policy (NEP) 2020
  23. Live Classes: RSSB Live Sessions
  24. Paper 1 - Full Mock Tests:
  25. Paper 2 - Full Mock Tests:
  26. BCI Previous Year Papers:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This educational video features an instructor, Sanchit Jain Sir, teaching SQL query formulation using a bank database schema. The lecture begins with practical examples where the instructor writes SQL code on a digital whiteboard to answer specific questions about branches, loans, and accounts. The session transitions into a theoretical explanation of the SELECT clause, comparing its function to the projection operator in relational algebra to reinforce the concept of vertical filtering. The video includes visual aids like the "KG" logo and handwritten diagrams.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor starts with the question "Write a SQL query to find all the details of bank branches?". He points to the branch table in the diagram, which contains attributes branch_name, branch_city, and assets. He circles these attributes in red to indicate they are the target columns. He then writes the SQL command Select * from Branch in red and blue ink, demonstrating how to retrieve every column from the specified table. The "KG" logo is visible in the top left corner.

  2. 2:00 – 5:00 02:00-05:00

    The instructor tackles three additional queries. First, for "find each loan number along with loan amount", he circles the loan table and writes Select loan_no, amount from Loan. Second, for "name of all customer without duplication having bank account", he circles the depositor table and writes Select distinct custname from Depositor, emphasizing the use of the distinct keyword to remove duplicates. Third, for "account_no and balance with 6% yearly interest added", he writes Select accountno, balance * 1.06 from Account, showing how to perform arithmetic calculations directly within the SELECT clause. The text is written in blue ink.

  3. 5:00 – 5:11 05:00-05:11

    The final segment displays a slide titled "Select Clause". The text explains that the SELECT clause is similar to the 'Π' (Pi) projection in relational algebra, used to pick required columns out of all columns in a relation. It highlights "Vertical filtering" and notes that the order of columns in the SELECT clause determines their appearance in the result. It also clarifies that while Relational Algebra projection is optional for all columns, SQL requires the SELECT clause for readability. The slide includes a diagram of a table with columns being selected. At the very end, the slide transitions to "Select Clause with where clause", introducing sigma (σ) notation.

The video provides a comprehensive introduction to the SELECT statement. It moves from concrete examples involving specific tables like branch, loan, and account to abstract theoretical definitions. This progression helps students understand not just the syntax for retrieving data, but also the underlying relational algebra principles that govern database operations. The instructor effectively uses visual cues to link the schema diagram to the written code, ensuring students grasp both the practical application and the theoretical foundation of SQL queries.

Loading lesson…