Question

Amit wants to be familiar with SQL. One of his friends Anand suggests him to execute the following SQL commands:
(A) Create Table Student
(B) Use Database DB
(C) Select * from Student
(D) Insert into Student
In which order Amit needs to run the above commands?

• A. (A), (B), (C), (D)
• B. (A), (B), (D), (C)
• C. (B), (A), (D), (C)
• D. (C), (B), (D), (A)

Answer 1

The Correct Option is C

The correct order for Amit to execute the SQL commands is (B), (A), (D), (C).

Additional Context:

• Proper SQL Execution Sequence:
  • (B) Use Database DB: First select the database to work with
  • (A) Create Table Student: Then create the table structure
  • (D) Insert into Student: Add data to the created table
  • (C) Select * from Student: Finally query the populated table
• Comparison with Other Options:
  • Option (1): Incorrect (tries to create table before selecting database)
  • Option (2): Incorrect (same issue as Option 1, plus queries before inserting)
  • Option (4): Incorrect (tries to query non-existent table first)
• SQL Command Flow Logic:
  • 1. Database selection (USE)
  • 2. Table creation (CREATE)
  • 3. Data manipulation (INSERT)
  • 4. Data retrieval (SELECT)
• Practical Example:

  -- Correct execution sequence:
  USE DB;                     -- Select database
  CREATE TABLE Student (...);  -- Create table
  INSERT INTO Student (...)    -- Insert data
  VALUES (...);
  SELECT * FROM Student;       -- View data
      

• Error Prevention:
  • Attempting to create a table without selecting a database may fail
  • Querying a table before it exists or has data returns errors/empty results

Correct Answer: (3) (B), (A), (D), (C)