On Fri, Jan 10, 2003 at 06:45:43PM -0500, Hale Pringle wrote:
> I have notices that when you want to use the upper() function, you must also
> use the trim().
No. But. . .
> For example,
> In a situation where a column names lastname is char(40):
> SELECT * FROM users WHERE lastname = 'Pringle' returns one row.
>
> SELECT * FROM users WHERE UPPER(lastname) = UPPER('Pringle') will return
> zero rows.
>
> SELECT * FROM users WHERE TRIM(UPPER(lastname) = TRIM(UPPER('Pringle'))
> will return one row.
>
> This seems odd to me. Can someone explain?
. . .yes. The problem has to so with the char() data type, which is
padded per spec. So if you do anything on it, you need to trim() it.
I believe there is a special case in place in the spec just for the
SELECTs, but someone more familiar with the specification can help.
If you don't really need exactly 40 characters, use varchar() or text().
A
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