What is the difference between BLOB and TEXT in MySQL?

BLOB is used for storing binary data while Text is used to store large string. BLOB values are treated as binary strings (byte strings). They have no character set, and sorting and comparison are based on the numeric values of the bytes in column values. TEXT values are treated as nonbinary strings (character strings).

When would you use a BLOB data type?

Because blobs are used to store objects such as images, audio files, and video clips, they often require significantly more space than other data types. The amount of data a blob can store varies depending on the database type, but some databases allow blob sizes of several gigabytes.

What is the difference between VARCHAR and TEXT in MySQL?

TEXT has a fixed max size of 2¹⁶-1 = 65535 characters. VARCHAR has a variable max size M up to M = 2¹⁶-1 . So you cannot choose the size of TEXT but you can for a VARCHAR . The other difference is, that you cannot put an index (except for a fulltext index) on a TEXT column.

What is BLOB query?

BLOB is a binary object data type in standard query language (SQL) that is used to store large files such as images, movies, audio clips etc in the database.

How do I know my BLOB type?

Normally, if you’re designing a table that stores multiple types of binary data, you’d have a blob column and then a separate varchar2 column that identifies the MIME type of the data. That would be something like application/pdf for PDF documents, image/png for PNG image files, etc.

Which is better varchar or TEXT in MySQL?

MySQL VARCHAR vs. In most circumstances, VARCHAR provides better performance, it’s more flexible, and can be fully indexed. If you need to store longer strings, use MEDIUMTEXT or LONGTEXT, but be aware that very large amounts of data can be stored in columns of these types.

Is VARCHAR more efficient than TEXT?

TEXT: The Short Answer. If you’re looking for a TL;DR, it’s this: use VARCHAR if your data is of variable length and you know it fits into VARCHAR’s 65,535 character limit. In most circumstances, VARCHAR provides better performance, it’s more flexible, and can be fully indexed.

What is the difference between Blob and text in SQL Server?

BLOB and TEXT differ from VARBINARY and VARCHAR in the following ways: For indexes on BLOB and TEXT columns, you must specify an index prefix length. For CHAR and VARCHAR, a prefix length is optional. BLOB and TEXT columns cannot have DEFAULT values.

What are the types of Blob in MySQL?

MySQL 8.0 Reference Manual / Data Types / String Types / The BLOB and TEXT Types. A BLOB is a binary large object that can hold a variable amount of data. The four BLOB types are TINYBLOB, BLOB, MEDIUMBLOB, and LONGBLOB. These differ only in the maximum length of the values they can hold.

Can blob and text columns have default values?

BLOB and TEXT columns cannot have DEFAULT values. If you use the BINARY attribute with a TEXT data type, the column is assigned the binary ( _bin) collation of the column character set. LONG and LONG VARCHAR map to the MEDIUMTEXT data type.

What are the Blob and text constraints in MySQL Connector/ODBC?

MySQL Connector/ODBC defines BLOB values as LONGVARBINARY and TEXT values as LONGVARCHAR . Because BLOB and TEXT values can be extremely long, you might encounter some constraints in using them: Only the first max_sort_length bytes of the column are used when sorting. The default value of max_sort_length is 1024.