1) Creating a table with a virtual column exampleįirst, create a table named parts which has a virtual column: CREATE TABLE parts( Let’s take some examples of using virtual columns. This statement shows how to define a virtual column in the CREATE TABLE statement: CREATE TABLE table_name (Īnd this statement illustrates how to add a virtual column to an existing table using the ALTER TABLE statement: ALTER TABLE table_nameĬode language: SQL (Structured Query Language) ( sql ) Oracle virtual column examples Note that the GENERATED ALWAYS and VIRTUAL keywords are for clarity only. The values of the virtual column will derive from the expression. Third, specify an expression in parentheses after the AS keyword.If you omit the data type, the virtual column will take the data type of the result of the expression. Second, specify the virtual column’s data type.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |