What are BLOB data type?

A blob is a data type that can store binary data. This is different than most other data types used in databases, such as integers, floating point numbers, characters, and strings, which store letters and numbers. Since blobs can store binary data, they can be used to store images or other multimedia files.

What are BLOB fields?

Answer. A BLOB (Binary Large Object) is a field created in a database such as Oracle, DB2, Informix or Microsoft SQL Server. A BLOB field can hold binary information like images or files. Generally, any datatype that starts with “LONG” is a BLOB. For example: “LONG”, “LONG RAW”, “LONG VARCHAR”.

What is TEXT data type in MySQL?

TEXT is the family of column type intended as high-capacity character storage. The actual TEXT column type is of four types-TINYTEXT, TEXT, MEDIUMTEXT and LONGTEXT. The four TEXT types are very similar to each other; the only difference is the maximum amount of data each can store.

How is BLOB stored in database?

BLOB storage BLOBs are not stored in the normal database files on disk in the same way as is other data managed by DB. Instead, they are stored as binary files in a special directory set aside for the purpose. The BLOB size limit is system dependent.

How do you read a BLOB TEXT?

“blob to text javascript” Code Answer’s

1. var reader = new FileReader();
2. reader. onload = function() {
3. alert(reader. result);
4. }
5. reader. readAsText(blob);

How do you convert a BLOB to TEXT?

create new columns of type text in the table for each blob column. convert all the blobs to text and save them in the new columns. remove the blob columns. rename the new columns to the names of the removed ones.

How do you BLOB a database?

Retrieving blob from database The getBytes() method of the Blob Interface retrieves the contents of the current Blob object and returns as a byte array. Using the getBlob() method you can get the contents of the blob in to a byte array and create an image using the write() method of the FileOutputStream object.

What is a BLOB message?

The BLOB message domain includes all the messages with content that cannot be interpreted and subdivided into smaller sections of information. Messages in this domain are processed by the BLOB parser.