Select the `price` column cast to INTEGER from the `products` table.

Problem Statement

<p>Select the <code>price</code> column cast to INTEGER from the <code>products</code> table.</p>

Examples

Input: products table: +----+--------+-------+ | id | name | price | +----+--------+-------+ | 1 | Widget | 19.99 | | 2 | Gadget | 49.50 | +----+--------+-------+

Output: +--------+-----------+ | name | int_price | +--------+-----------+ | Widget | 20 | | Gadget | 50 | +--------+-----------+

Explanation: The query retrieves the requested records satisfying all problem requirements.

Complexity

Time Complexity: -

Space Complexity: -

Hints

💡 Hint 1: Identify the filtering conditions needed to isolate the target rows from the table. 💡 Hint 2: Use appropriate operators: = for exact matches, LIKE for wildcard patterns, IN for sets, or BETWEEN for numeric/date ranges. 💡 Hint 3: Combine filters with AND/OR if multiple conditions exist: SELECT <cols> FROM <table> WHERE <condition>;

Editorial & Approach

Problem Overview & Intuition

To solve "CAST Type Conversion", we query the relational database engine using declarative SQL. The goal is to select the `price` column cast to integer from the `products` table. By formulating an optimal execution plan with appropriate projection and filtering, the database engine executes the query with minimal overhead.

Step-by-Step Approach

Analyze Schema: Identify the target tables, necessary foreign keys, and expected output columns.
Construct Filtering & Logic: Apply row projections to isolate the requested data.
Format & Order: Ensure columns match the expected project schema in order.

Optimal Implementation (SQL)

SELECT name, CAST(price AS INTEGER) AS int_price FROM products;

Complexity Analysis

Time Complexity O(N)

Space Complexity O(1)

Key Considerations & Edge Cases

Empty Tables: The query executes safely returning zero rows without syntax error.
NULL Values: Columns containing NULL values are properly handled by standard ANSI SQL semantics.
Case Sensitivity: String comparisons and keywords adhere to PostgreSQL/standard SQL rules.

CAST Type Conversion

Easy

Select the price column cast to INTEGER from the products table.

Example Scenarios

1Example 1

Input:

products table

id	name	price
1	Widget	19.99
2	Gadget	49.50

Output:

name	int_price
Widget	20
Gadget	50

Explanation:

The query retrieves the requested records satisfying all problem requirements.

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