I have mysql 3.23.49 on Mac OS-X 10.1.5 and am going through the tutorial in the "MySQL Reference Manual" in Chapter 3.
I get an empty set with the following command:
SELECT * FROM pet WHERE birth >= "1998-1-1";
I have tried many variations which all give either the empty set or incorrect results.
For instance, SELECT * FROM pet WHERE 'birth' >= "1998-1-1";
You've quoted 'birth' here, so you're performing a string comparison. For the rows below, 'birth' is indeed lexically greater than "1998-1-1".
+----------+--------+---------+------+------------+------------+ | name | owner | species | sex | birth | death | +----------+--------+---------+------+------------+------------+ | Fluffy | Harold | cat | f | 1993-02-04 | NULL | | Claws | Gwen | cat | m | 1994-03-07 | NULL | | Buffy | Harold | dog | f | 1989-05-13 | NULL | | Fang | Benny | dog | m | 1990-08-27 | NULL | | Bowser | Diane | dog | m | 1989-08-31 | 1995-07-29 | | Chirpy | Gwen | bird | f | 1098-08-11 | NULL | | Whistler | Gwen | bird | | 1997-12-09 | NULL | | Slim | Benny | snake | m | 1996-04-29 | NULL | +----------+--------+---------+------+------------+------------+ or select * from pet where birth > "1997-1-1";
This result does indeed not look correct. Hm -- I get the correct result (3 rows) with Mac OS X (10.2.6) with MySQL 4.0.14. What happens when you use "1997-01-01" instead?
+----------+-------+---------+------+------------+-------+ | name | owner | species | sex | birth | death | +----------+-------+---------+------+------------+-------+ | Whistler | Gwen | bird | | 1997-12-09 | NULL | +----------+-------+---------+------+------------+-------+ 1 row in set (0.00 sec)
Is there something wrong with my table? I had to give myself FILE privileges before I could load my table data from a file. (The tutorial didn't mention that.)
The tutorial uses LOAD DATA LOCAL rather than LOAD DATA; with LOCAL you shouldn't need the FILE privilege.
Is there something wrong with my installation?
-- Paul DuBois, Senior Technical Writer Madison, Wisconsin, USA MySQL AB, www.mysql.com
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