What is difference between tables and views?

A table is structured with columns and rows, while a view is a virtual table extracted from a database. The table is an independent data object while views are usually depending on the table. The table is an actual or real table that exists in physical locations.

Which is better view or table?

A view consists of rows and columns just like a table. The difference between a view and a table is that views are definitions built on top of other tables (or views), and do not hold data themselves. If data is changing in the underlying table, the same change is reflected in the view.

What is a DB2 table view?

A view is an alternative way of representing data that exists in one or more tables. A view can include all or some of the columns from one or more base tables.

Is view faster than table SQL?

Views make queries faster to write, but they don’t improve the underlying query performance. Once we create an indexed view, every time we modify data in the underlying tables then not only must SQL Server maintain the index entries on those tables, but also the index entries on the view.

Are views updatable in Db2?

A column of a view is updatable when all of the following rules are true: The view is deletable. The column resolves to a column of a table (not using a dereference operation) and the READ ONLY option is not specified.

Can we alter view in Db2?

ALTER VIEW is primarily used during Db2 migration or when Db2 maintenance is applied. To change a view definition (for example, to add additional columns), you must drop the view and create a new view using the CREATE VIEW statement.

Which is faster table or view?

What’s the difference between SQL Server and DB2?

The difference between Db2 and SQL Server is that both are developed by different companies. One is being developed by IBM, and the latter is being developed by Microsoft Corporation. While Db2 is a family of data management, which includes database servers as well. SQL is a Relational Database Management.

What is the use of table without journaling in DB2?

From sql interface when we creating table we are getting return message like table is created but not journaled if this is the way to use db2 then what is the use of table without journaling. The use of a table is mostly the same with or without journaling. You can INSERT, DELETE and UPDATE just the same whether a journal is associated or not.

What’s the difference between Table space and database?

The database stores all data in tables that are related to one another. Relationships are established between tables such that data is shared and duplication is minimized. A table space is a storage structure containing tables, indexes, large objects, and long data.

What’s the difference between db400 and SQL standard tables?

At least one big difference is that “db400” handles not only SQL standard tables, but also native files. There are attributes of native files that aren’t handled quite directly within SQL such as multiple members. A migration away from “db400” needs to account for multi-member files.