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Omit the AS for table alias in Oracle. SELECT G.Guest_ID, G.First_Name, G.Last_Name FROM Guest G JOIN Stay S ON G.Guest_ID = S.Guest_ID WHERE G.City = 'Miami' AND S.Room = '222'; This will give you the output without errors.
18 paź 2009 · Is it possible to alias a column name and then use that in a CASE statement? For example, SELECT col1 as a, CASE WHEN a = 'test' THEN 'yes' END as value FROM table;
Oracle column alias. When you query data from a table, Oracle uses the column names of the table to display the column heading. For example, the following statement returns the first name and last name of employees: SELECT . first_name, last_name. FROM . employees. ORDER BY . first_name; Code language: SQL (Structured Query Language) (sql)
18 maj 2017 · If you want to dynamically set a column name, then the SQL itself must be dynamic. So you can use a ref cursor for that. SQL> create table t ( x date, bal number ); Table created. SQL> SQL> insert into t values ( date '2017-05-17', 10 ); 1 row created.
7 sty 2020 · In ORDER BY you can refer to column aliases in the SELECT clause. This is what's happening in query 2. It isn't sorting by the values in the column. It's sorting by the values from the product and country. So for product TOTALs it sorts the values DK, GB, US, TOTAL => DK, GB, TOTAL, US.
Table A is set up just to match the COL_ID with the column "name" in Table B in order to get the value of COL_DESCRIPTION to be used as a column alias. For Example: COLUMN ALIAS (is something like this possible?) | | V |-----| select B.BD1423 (select A.COL_DESCRIPTION from A where A.COL_ID = "BD1423"), <-- I don't want to hard code to "BD1423 ...
If you provide an alias for an aggregation function, then the database generates a name for each new column to which that aggregated value is transposed by concatenating the pivot column name, the underscore character (_), and the aggregation function alias.
