Quick Answer: What is char and varchar in MySQL?

What is difference between VARCHAR and CHAR?

CHAR is fixed length and VARCHAR is variable length. CHAR always uses the same amount of storage space per entry, while VARCHAR only uses the amount necessary to store the actual text. The char is a fixed-length character data type, the varchar is a variable-length character data type.

What is the difference between CHAR and VARCHAR MySQL?

A CHAR field is a fixed length, and VARCHAR is a variable length field. This means that the storage requirements are different – a CHAR always takes the same amount of space regardless of what you store, whereas the storage requirements for a VARCHAR vary depending on the specific string stored.

What is difference between CHAR and VARCHAR with example?

The short answer is: VARCHAR is variable length, while CHAR is fixed length. CHAR is a fixed length string data type, so any remaining space in the field is padded with blanks. … For example, if you set a VARCHAR(100) data type = ‘Jen’, then it would take up 3 bytes (for J, E, and N) plus 2 bytes, or 5 bytes in all.

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Should I use CHAR or VARCHAR?

If you use char or varchar, we recommend to: Use char when the sizes of the column data entries are consistent. Use varchar when the sizes of the column data entries vary considerably. Use varchar(max) when the sizes of the column data entries vary considerably, and the string length might exceed 8,000 bytes.

Which is faster CHAR or VARCHAR?

VARCHAR is used to store variable length character strings up to 4000 characters. But, remember CHAR is faster than VARCHAR – some times up to 50% faster.

Where is CHAR and VARCHAR used?

Char is used by programmers when the length of the data value is known and varchar is used when the length of data values keeps varying for each cell. As the name suggests, char stores only specific string characters.

What does VARCHAR 255 mean?

The length can be specified as a value from 0 to 65,535. The effective maximum length of a VARCHAR is subject to the maximum row size (65,535 bytes, which is shared among all columns) and the character set used. … VARCHAR(255) stores 255 characters, which may be more than 255 bytes.

Where do we use CHAR in MySQL?

The CHAR and VARCHAR types are declared with a length that indicates the maximum number of characters you want to store. For example, CHAR(30) can hold up to 30 characters. The length of a CHAR column is fixed to the length that you declare when you create the table. The length can be any value from 0 to 255.

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What does VARCHAR mean in MySQL?

A varchar or variable character field is a set of character data of indeterminate length. The term varchar refers to a data type of a field (or column) in a database management system which can hold letters and numbers.

What is CHAR used for?

The char type is used to store single characters (letters, digits, symbols, etc…).

What does varchar 20 mean?

The data type of varchar is Variable-length with non-Unicode character data. The storage size is the actual length of data entered + 2 bytes. • For varchar (20): The max storage size is: 20*1 byte +2 bytes=22 bytes; •

What is a CHAR data type?

The CHAR data type stores character data in a fixed-length field. Data can be a string of single-byte or multibyte letters, numbers, and other characters that are supported by the code set of your database locale. … The size of a CHAR column is byte-based, not character-based.

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