TYPE OF VALUES IN SQL


SQL supports various data types to represent different kinds of values. Here are some common SQL data types:

**1. Numeric Types:**
   - **INT** or **INTEGER**: Integer values (e.g., 1, 10, -5).
   - **NUMERIC** or **DECIMAL**: Fixed-point or floating-point numbers.
   - **FLOAT**: Floating-point numbers with decimal places.
   - **REAL**: Single-precision floating-point numbers.
   - **DOUBLE** or **DOUBLE PRECISION**: Double-precision floating-point numbers.

**2. Character Strings:**
   - **CHAR(n)**: Fixed-length character string (e.g., CHAR(10)).
   - **VARCHAR(n)**: Variable-length character string (e.g., VARCHAR(255)).
   - **TEXT**: Variable-length text.

**3. Date and Time Types:**
   - **DATE**: Date values (e.g., '2023-10-14').
   - **TIME**: Time values (e.g., '12:30:00').
   - **TIMESTAMP**: Date and time combined (e.g., '2023-10-14 12:30:00').

**4. Boolean Type:**
   - **BOOLEAN**: Represents true or false values.

**5. Binary Data Types:**
   - **BINARY(n)**: Fixed-length binary data.
   - **VARBINARY(n)**: Variable-length binary data.
   - **BLOB**: Binary Large Object for storing large binary data.

**6. Enumerated Types:**
   - **ENUM**: Represents a static, ordered set of values.

**7. Geometric Types:**
   - **POINT**: Represents a 2D point.
   - **LINE**: Represents a line.
   - **POLYGON**: Represents a polygon.

**8. Network Address Types:**
   - **CIDR**: Represents an IPv4 or IPv6 network address.
   - **INET**: Represents an IPv4 or IPv6 host address.
   - **MACADDR**: Represents a MAC address.

**9. UUID Type:**
   - **UUID**: Universally Unique Identifier.

**10. Arrays:**
    - **ARRAY**: Represents an array of values.

**11. JSON Types:**
    - **JSON**: Stores JSON-formatted data.

**12. XML Type:**
    - **XML**: Stores XML data.

**13. Money Type:**
    - **MONEY**: Represents currency values.

**14. Bit Strings:**
    - **BIT(n)**: Fixed-length bit string.
    - **BIT VARYING(n)**: Variable-length bit string.

**15. Interval Types:**
    - **INTERVAL**: Represents a time interval.

**16. Custom User-Defined Types:**
    - You can create your own data types in some database systems.

Each database system may have slight variations in supported data types and their names, but these are the most common types you'll encounter in SQL. The choice of data type depends on the nature of the data you're storing and the specific requirements of your database.

Comments

Post a Comment

Popular posts from this blog

How to Start Coding: The Ultimate Guide for Beginner Programmers

Image
Coding is one of the most valuable skills you can build. If you’re searching for "how to learn coding," it might be because you want to advance your career. Maybe you’re hoping to build software or games for your friends or get a better grip on the tech space. Either way, learning the language of computers can be a major asset to your professional and personal development. With time, dedication, and internet access, anyone can learn to code. If you’re reading this, that includes you. That’s why, in this guide, we’ll unpack everything you need to know to start writing code, including: Why learn to code? How to Start Coding? Coding vs. Programming? Coding for Beginners? What is coding? Coding is the process of using programming languages to give instructions to a computer. These instructions power the websites, software, and applications people use every day. Why Learn to Code? Before diving into your first lesson, think about why you want to code in the first place...
Read more

SMART STUDY RATHER THAN HARD STUDY

Image
Smart studying involves effective strategies that help you learn and retain information efficiently. Here are some tips to study smart, rather than just studying hard: 1. **Set Clear Goals:** Define specific, achievable study goals. Knowing what you need to accomplish will help you focus your efforts. 2. **Prioritize:** Identify the most important topics or tasks and start with those. Don't waste time on less crucial material. 3. **Active Learning:** Engage with the material actively. Summarize, teach, or discuss it with others. This helps solidify your understanding. 4. **Use Technology Wisely:** Utilize educational apps, online resources, and digital tools that can aid your learning process. 5. **Chunk Information:** Break information into smaller, manageable chunks. It's easier to remember and understand material this way. 6. **Practice Regularly:** Frequent, shorter study sessions are often more effective than cramming. Spaced repetition can enhance retention. 7...
Read more

HTML LEARNING ROADMAP

Image
 HTML learning roadmap: 1. **Introduction to HTML:    - Learn about the structure of HTML documents.    - Understand HTML tags and attributes. 2. **HTML Document Structure:**    - Study the basic structure of an HTML document (DOCTYPE, html, head, body).    - Explore the use of meta tags, title tags, and headers. 3. **Text and Multimedia:**    - Learn how to create headings, paragraphs, and text formatting.    - Understand how to embed images and videos. 4. **Links and Navigation:**    - Explore the use of anchor tags for creating hyperlinks.    - Learn about navigation within a website using lists and links. 5. **Forms:**    - Understand form elements like input, textarea, and buttons.    - Learn about form validation and submission. 6. **Tables:**    - Explore the creation of tables to organize data. 7. **Semantic HTML:**    - Learn about semantic ta...
Read more