What is LOB data type?

Large Objects (LOBs) are a set of data types that are designed to hold large amounts of data. A LOB can hold up to a maximum size ranging from 8 terabytes to 128 terabytes depending on how your database is configured. Storing data in LOBs enables you to access and manipulate the data efficiently in your application.

How many types of LOB are there?

There are two types of LOBs: internal and external. Internal LOBs (BLOBs, CLOBs, and NCLOBs) are stored in the database and can participate in a transaction in the database server. External LOBs (BFILEs) represent binary data stored in operating-system files outside the database tablespaces.

What is hybrid LOB in SAP HANA?

To save memory you can store LOB data on disk, in this case the data is only loaded into memory when it is needed. Alternatively, you can use the configurable Hybrid LOB feature which is flexible and stores LOBs either on disk or in memory depending on their size.

What is the difference between CLOB and Nclob?

The primary difference between these types is that the CLOB type uses 1 byte per character to store characters in the ASCII character set while the NCLOB type uses 2 or 3 bytes per character to store characters in the Unicode character set. The BLOB (Binary Large Object) type can store data in binary format.

What is LOB in Postgres?

Table of Contents PostgreSQL Oracle. A lob is a large object. Lob columns can be used to store very long texts or binary files. There are two kind of lobs: CLOB and BLOB.

What is BLOB in Hana?

BLOB. The BLOB data type is used to store large amounts of binary data. BLOB values can be converted to VARBINARY. The SAP HANA BLOB data type is mapped to SAP ASE IMAGE data type.

What is column store in SAP HANA?

The SAP HANA database supports two types of table: those that store data either column-wise ( column tables ) or row-wise ( row tables ). A row store stores a sequence of records that contains the fields of one row in the table. In a column store, the entries of a column are stored in contiguous memory locations.

What is the correct hierarchy of the SAP HANA component model?

SAP HANA supports two types of Hierarchies, namely, Level Hierarchy and Parent-Child Hierarchy.

What is VARCHAR2 in SQL?

The VARCHAR2 data type specifies a variable-length character string in the database character set. You specify the database character set when you create your database. When you create a table with a VARCHAR2 column, you must specify the column length as size optionally followed by a length qualifier.

What is toast table in PostgreSQL?

TOAST is a mechanism PostgreSQL uses to keep physical data rows from exceeding the size of a data block (typically 8KB). To allow user tables to have rows wider than this, the TOAST mechanism breaks up wide field values into smaller pieces, which are stored “out of line” in a TOAST table associated with the user table.