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Database-style Records: ID/City/Score

Database-Style Record problems present a set of records with multiple fields (e.g., ID, Name, City, Score). You must match field values to create complete records using given constraints. Each field has unique values across records.

10Worksheets
200+Practice Questions
HardDifficulty
3-4 hoursHours to Master

What You'll Learn

Introduction & Overview Why This Matters How to Solve Pro Tips & Tricks
Shortcut Methods Common Mistakes Practice Worksheets Exam Importance

Introduction to Database-style Records: ID/City/Score

Database-Style Record problems present a set of records with multiple fields (e.g., ID, Name, City, Score). You must match field values to create complete records using given constraints. Each field has unique values across records.

Prerequisites

Tabular arrangement basics Unique value constraints Comparative statements across fields Process of elimination
Why This Matters: Database-Style problems appear in 1-2 questions in SSC CGL and Banking PO exams. They test multi-field matching and constraint satisfaction.

How to Solve Database-style Records: ID/City/Score Problems

1

Step 1: List all records (rows) and fields (columns)

2

Step 2: Identify which fields are known and which are unknown

3

Step 3: Apply direct assignments (e.g., 'Record with ID 101 has Score 85')

4

Step 4: Apply comparative constraints across fields (e.g., 'Score of record with ID 102 is higher than score of record from City X')

5

Step 5: Use elimination to match unknown field values

6

Step 6: Ensure each field value is used exactly once per field type

7

Step 7: Answer the specific question

Pro Strategy: Create a table with records as rows and fields as columns. Mark known values. Use comparative constraints to establish ordering. Use elimination to match remaining values. Each field value (ID, Name, City, Score) is unique per record.

Example Problem

Example: Five records with fields ID, Name, City, Score. Record with ID 101 has higher score than record from Mumbai. Name 'John' has score not lowest. Record from Delhi has ID greater than record with ID 104. Find which city corresponds to highest score. Solution: Step 1: List records with known and unknown fields Step 2: Apply direct assignments Step 3: Use comparative constraints to order scores or IDs Step 4: Use elimination to match cities to records Step 5: Identify city with highest score Answer: City with highest score identified

Pro Tips & Tricks

  • Each field has unique values across all records
  • Use > and < to compare numerical fields (Score, ID)
  • Use equality for matching fields (e.g., 'Name X has City Y')
  • Start with the most restrictive constraints
  • Create separate ordering lists for numerical fields
  • Cross-reference between fields to resolve ambiguities

Shortcut Methods to Solve Faster

Number of records = number of unique values per field
If a field value is assigned to a record, it cannot be assigned elsewhere
Comparative constraints create partial orders
Use a grid to track possible value assignments

Common Mistakes to Avoid

Forgetting that each field value is unique
Not updating the table after each deduction
Confusing comparative direction (higher vs lower)
Leaving field values unmatched

Exam Importance

Database-style Records: ID/City/Score is an important topic for various competitive exams. Here's how frequently it appears:

SSC CGL
1-2 questions
BANKING PO
1-2 questions
RAILWAYS RRB
1-2 questions
CAT
1-2 questions
INSURANCE
1-2 questions

Ready to Master Database-style Records: ID/City/Score?

Start with Worksheet 1 and work your way up to expert level! Each worksheet includes:

20 practice questions
Detailed solutions
Step-by-step explanations
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