Software Engineering

SQL Data Type Reference & Comparison

Search and compare SQL data types (INT, VARCHAR, TEXT, DECIMAL, DATETIME, BLOB) across MySQL, PostgreSQL, and SQLite.

SQL Data Type Reference & Cross-Engine Comparison
Data Type Category Storage Size / Range Cross-Engine Compatibility
INT / INTEGERNumeric4 Bytes (±2.14 Billion)MySQL / PostgreSQL / SQLite
BIGINTNumeric8 Bytes (±9.22 Quintillion)MySQL / PostgreSQL / SQLite
VARCHAR(n)StringVariable up to $n$ charsMySQL / PostgreSQL / SQLite
TEXTStringUp to 65,535 bytesMySQL / PostgreSQL / SQLite
DECIMAL(p,s)Numeric (Exact)Exact fixed-point precisionMySQL / PostgreSQL / SQLite
DATETIME / TIMESTAMPDate & Time8 Bytes (YYYY-MM-DD HH:MM:SS)MySQL / PostgreSQL
JSONStructuredVariable JSON documentMySQL 5.7+ / PostgreSQL
BLOBBinary Large ObjectRaw binary data storageMySQL / PostgreSQL / SQLite
What is SQL Data Type Reference & Comparison?

SQL Data Type Reference & Comparison is an online engineering and computational utility designed to provide immediate, high-precision results for students, researchers, and developers.

Formula & Method

Calculations use standard precision formulas and client-side processing:

SQL Data Type Reference & Comparison Engine
Where it is Used

Widely utilized in academic coursework, laboratory experimentation, production engineering, electronic circuit prototyping, and web application development.

Practical Worked Example
Sample Scenario:
Given initial input values into the calculator above:
  • Input Parameter 1: Standard test value
  • Input Parameter 2: Design specification
  • Result: Calculated instantaneously without server latency.
Input Guidelines
  1. Enter positive numbers or text strings into the designated input fields.
  2. If invalid values are supplied, the calculator displays a friendly error: "Please enter a valid number."
  3. Use the Copy button to copy calculated outputs directly to your clipboard.
  4. Click Clear / Reset to restore default sample values.
Technical Disclaimer: Results generated by SQL Data Type Reference & Comparison are intended for educational, research, and general design estimates. Critical structural, electrical, or medical calculations should be independently verified against official technical datasheets.
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