Text vs Varchar in MySQL: Key Differences and Usage

In MySQL, VARCHAR is a variable-length string type with a maximum length of 65,535 bytes, optimized for shorter strings and stored inline. TEXT is designed for longer text data, stored separately with a maximum length of 65,535 bytes, but with some limitations on indexing and performance.

Quick Comparison

This table summarizes the main differences between VARCHAR and TEXT in MySQL.

Feature	VARCHAR	TEXT
Maximum Length	Up to 65,535 bytes (depends on row size and charset)	Up to 65,535 bytes
Storage	Stored inline with the table row	Stored separately with a pointer in the row
Indexing	Fully indexable (prefix length can be specified)	Only prefix indexing allowed (up to 767 bytes)
Performance	Faster for shorter strings due to inline storage	Slower for large text due to separate storage
Use Case	Short to medium strings like names, emails	Large text like descriptions, articles
Memory Usage	Uses only needed space plus 1-2 bytes for length	Uses fixed 2 bytes pointer plus actual text storage

Key Differences

VARCHAR is a flexible string type that stores data inline with the table row. It uses 1 or 2 extra bytes to record the string length, making it efficient for shorter strings. The maximum length depends on the character set and total row size but can be up to 65,535 bytes.

TEXT types are designed for large text data and are stored outside the table row with only a pointer inside the row. This means accessing TEXT fields can be slower because MySQL needs to fetch the data separately. Also, TEXT columns have limitations on indexing; only a prefix of the text can be indexed, which can affect query performance.

In summary, VARCHAR is best for shorter strings where fast access and indexing are important, while TEXT is suitable for large blocks of text where size exceeds VARCHAR limits but indexing is less critical.

Code Comparison

mysql

CREATE TABLE example_varchar (
  id INT PRIMARY KEY,
  name VARCHAR(255)
);

INSERT INTO example_varchar (id, name) VALUES (1, 'Alice'), (2, 'Bob');

SELECT * FROM example_varchar;

Output

id | name
---|-------
1  | Alice
2  | Bob

TEXT Equivalent

mysql

CREATE TABLE example_text (
  id INT PRIMARY KEY,
  description TEXT
);

INSERT INTO example_text (id, description) VALUES (1, 'This is a long description text.'), (2, 'Another long text example.');

SELECT * FROM example_text;

Output

id | description
---|---------------------------------
1  | This is a long description text.
2  | Another long text example.

When to Use Which

Choose VARCHAR when you need to store short to medium-length strings that require fast access and full indexing, such as names, emails, or codes. It is efficient in storage and performance for these cases.

Choose TEXT when you need to store large amounts of text, like articles, comments, or descriptions, where the size exceeds VARCHAR limits and indexing is less important. Be aware that TEXT fields may have slower access and limited indexing options.

Key Takeaways

VARCHAR stores variable-length strings inline and is faster for short text.

TEXT stores large text separately and is suited for long content with limited indexing.

Use VARCHAR for short strings needing full indexing and quick access.

Use TEXT for large text blocks where size exceeds VARCHAR limits.

Indexing on TEXT is limited to prefixes, which can affect query speed.