How do I escape a reserved word in oracle

Question

In TSQL I could use something like Select [table] from tablename to select a column named "table".

How do I do this for reserved words in oracle?

Edit: I've tried square braces, double quotes, single quotes, and backquotes, they don't work...

As a further clarification, I have a column which someone named comment. As this is a reserved word oracle is chucking a wobbly trying to select with it, its failing when parsing the query. I've tried Select "comment" from tablename but it didn't work. I'll check case and come back.

Answer 1

From a quick search, Oracle appears to use double quotes (", eg "table") and apparently requires the name to be fully qualified and the correct case—whereas, for anyone interested, MySQL defaults to using backtics (`) except when set to use double quotes for compatibility.

Answer 2

Oracle does use double-quotes, but you most likely need to place the object name in upper case, e.g. "TABLE". By default, if you create an object without double quotes, e.g.

CREATE TABLE table AS ...

Oracle would create the object as upper case. However, the referencing is not case sensitive unless you use double-quotes!

Answer 3

eyelidlessness (huh??) was correct regarding the double quotes.

However if quoted names are use, Oracle is case-sensitive (and typically Oracle names are all-uppercase).

Answer 4

Oracle normally requires double-quotes to delimit the name of identifiers in SQL statements, e.g.

SELECT "MyColumn" AS "MyColAlias"
FROM "MyTable" AS "Alias"
WHERE "ThisCol" = 'That Value';

However, it graciously allows omitting the double-quotes, in which case it quietly converts the identifier to uppercase:

SELECT MyColumn AS MyColAlias
FROM MyTable AS Alias
WHERE ThisCol = 'That Value';

gets internally converted to something like:

SELECT "MYTABLE" . "MYCOLUMN" AS "MYCOLALIAS"
FROM "THEUSER" . "MYTABLE" AS "ALIAS"
WHERE "MYTABLE" . "THISCOL" = 'That Value';