DUAL is a table automatically created by Oracle Database along with the data dictionary. DUAL is in the schema of the user SYS but is accessible by the name DUAL to all users. It has one column, DUMMY , defined to be VARCHAR2(1) , and contains one row with a value X .

What is select from dual in SQL Server?

Dual is a table that is created by Oracle together with data dictionary. It consists of exactly one column named “dummy”, and one record. … You can check the content of the DUAL table using the following syntax. SELECT * FROM dual. It will return only one record with the value ‘X’.

Is there a dual in SQL Server?

In SQL Server DUAL table does not exist, but you could create one. The DUAL table was created by Charles Weiss of Oracle corporation to provide a table for joining in internal views.