Re^2: dbi odbc return string getting truncated

I was astonished at first, too, but "AS" probably is optional. Don't know about OP's database, but for SQLite, it is for the result column (not in CAST, though).

My next question would be: what table or column definitions are used when there is no "FROM"?

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Re^3: dbi odbc return string getting truncated
by afoken (Chancellor) on Aug 07, 2019 at 18:42 UTC

I was astonished at first, too, but "AS" probably is optional. Don't know about OP's database, but for SQLite, it is for the result column (not in CAST, though).

Yes, that's standard SQL. The AS in column-or-expression AS alias is optional.

My next question would be: what table or column definitions are used when there is no "FROM"?

None.

SELECT 42 AS RESULT
[download]

is perfectly legal SQL. It returns a single row with - in this case - a single column with a type matching the type of the expression left of AS. Only Oracle insists on a table or view, and it has a dummy table called DUAL for exactly that purpose. So, Oracle wants

SELECT 42 AS RESULT FROM DUAL
[download]

Alexander

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