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Select from dual in T-SQL / SQL Server

2019-05-28 mssqlt-sql

In Oracle database, you can select from dual table if you only want to return a one row result set. In many other databases, the query engine supports select directly from constant values without specifying a table name.

In SQL Server, you can directly select values without specifying a table name.

Code snippet

SELECT "Constant Value" AS COLUMN_NAME;