Create a view error - sql

Question

Hello I am trying to create a view using the following:
CREATE OR REPLACE VIEW CONCERT_EVENTS1 AS
SELECT CONCERT.CONCERT_ID, EVENT.EVENT_ID, CONCERT.NAME, EVENT.DATE1 , CONCERT.DURATION,
CONCERT.COST AS TO_CHAR(COST, 'L9,999.99')
FROM EVENT
INNER JOIN CONCERT
ON CONCERT.CONCERT_ID = EVENT.CONCERT_ID;
Below is the error I'm receiving:
Error starting at line 1 in command:
CREATE OR REPLACE VIEW CONCERT_EVENTS1 AS
SELECT CONCERT.CONCERT_ID, EVENT.EVENT_ID, CONCERT.NAME, EVENT.DATE1 , CONCERT.DURATION,
CONCERT.COST AS TO_CHAR(COST, 'L9,999.99')
FROM EVENT
INNER JOIN CONCERT
ON CONCERT.CONCERT_ID = EVENT.CONCERT_ID
Error at Command Line:2 Column:113
Error report:
SQL Error: ORA-00923: FROM keyword not found where expected
00923. 00000 - "FROM keyword not found where expected"
*Cause:
*Action:
What is the problem with my SQL?

Answer 1

The AS statement is incorrect. AS is used in selects to rename a column. So CONCERT.COST as CONCERT_COST would rename the column to CONCERT_COST in your view. If you want to format the column, that goes to the left of the as:
TO_CHAR(CONCERT.COST, 'L9,999.99') AS FORMATED_COST
if you still want to rename the column.

Answer 2

Your "AS TO_CHAR(COST, 'L9,999.99')" is not quite right. The "As" statement is used to alias a column, you don't want the column to be named "TO_CHAR(COST, 'L9,999.99')"
I believe what you want is:
CREATE OR REPLACE VIEW CONCERT_EVENTS1 AS
SELECT CONCERT.CONCERT_ID, EVENT.EVENT_ID, CONCERT.NAME, EVENT.DATE1 , CONCERT.DURATION,
TO_CHAR(CONCERT.COST, 'L9,999.99') as 'ALIAS_HERE'
FROM EVENT
INNER JOIN CONCERT
ON CONCERT.CONCERT_ID = EVENT.CONCERT_ID;

Answer 3

This message always indicates a syntax error in the query projection, the bit between the SELECT and the FROM keywords:
ORA-00923: FROM keyword not found where expected
You are still getting it because you have muffed the suggested fix for your original bloomer. Now you have two declarations for the COST column ....
CONCERT.COST TO_CHAR(CONCERT.COST, 'L9,999.99') AS FORMATED_COST
Syntax demands we put a comma between every column in the projection:
CREATE OR REPLACE VIEW CONCERT_EVENTS1 AS
SELECT CONCERT.CONCERT_ID
, EVENT.EVENT_ID
, CONCERT.NAME
, EVENT.DATE1
, CONCERT.DURATION
, CONCERT.COST
, TO_CHAR(CONCERT.COST, 'L9,999.99') AS FORMATED_COST
FROM EVENT INNER
JOIN CONCERT
ON CONCERT.CONCERT_ID = EVENT.CONCERT_ID
Alternatively, if you don't want the numeric COST column in the view just drop it.
I know syntax errors are hard for beginners but you really need to learn to look at your own code with a cool eye. You can't come running to SO every time you've dropped a comma. Laying out your code in a proper fashion will help: code which is easier to read is easier to debug. For the same reason you should avoid putting all your code in UPPER CASE.