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How can I produce a table with 2 rows and 2 columns without selecting from an existing table? What I'm looking for is a select statement that returns,
e.g.
id | value
---------
1 | 103
2 | 556
804
No. dual has just one row, but you can use union all : SELECT 1 FROM DUAL UNION ALL SELECT 2 FROM DUAL UNION ALL SELECT 4542 FROM DUAL UNION ALL SELECT 342 FROM DUAL; This is just one way to generate a table "on-the-fly" in Oracle.
If more than one column name appears in the phrase, each one must be a connected reference to the same group. The clause "SELECT" cannot be used without the clause "FROM." With the aid of certain functions, the SQL GROUP BY Statement is used to group identical data into groups.
The SQL EXCEPT operator is used to return all rows in the first SELECT statement that are not returned by the second SELECT statement. Each SELECT statement will define a dataset. The EXCEPT operator will retrieve all records from the first dataset and then remove from the results all records from the second dataset.
You may use the IN, ANY, or ALL operator in outer query to handle a subquery that returns multiple rows. Contents: Using IN operator with a Multiple Row Subquery.
Use UNION
SELECT 1 as id, 103 as value
UNION
SELECT 2 as id, 556 as valueYou can use UNION ALL. Which is better choice then UNION
SELECT 1 as id, 103 as value
UNION ALL
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