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11 gru 2009 · The char is a fixed-length character data type, the varchar is a variable-length character data type. Because char is a fixed-length data type, the storage size of the char value is equal to the maximum size for this column.
8 paź 2010 · 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.
25 cze 2024 · What is the main difference between CHAR and VARCHAR in MySQL? CHAR : Stores fixed-length character strings, padded with spaces if necessary. VARCHAR : Stores variable-length character strings, using only the required storage space.
21 cze 2022 · VARCHAR is efficient for non-Unicode text up to 8,000 characters, while VARCHAR(MAX) handling larger text data up to 2 GB. NVARCHAR supports Unicode data, making it suitable for multilingual applications.
VARCHAR(size) A VARIABLE length string (can contain letters, numbers, and special characters). The size parameter specifies the maximum column length in characters - can be from 0 to 65535: BINARY(size) Equal to CHAR(), but stores binary byte strings. The size parameter specifies the column length in bytes. Default is 1: VARBINARY(size)
The following table illustrates the differences between CHAR and VARCHAR by showing the result of storing various string values into CHAR(4) and VARCHAR(4) columns (assuming that the column uses a single-byte character set such as latin1).
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.
