Hello,
I'm using MySQL 4.0.20 on Linux and I am experiencing some problems with a query result.
I have the following table structure:
mysql> desc gen_Lloyds_vessel; +-----------------+----------+------+-----+---------------------+----------------+ | Field | Type | Null | Key | Default | Extra | +-----------------+----------+------+-----+---------------------+----------------+ | iLloydsvesselID | int(11) | | PRI | NULL | auto_increment | | cName | char(50) | | | | | | iImo | int(11) | | | 0 | | | cCountry | char(5) | | | | | | iYearbuilt | int(11) | | | 0 | | | cVesseltype | char(40) | | | | | | iEnteredby | int(11) | | | 0 | | | tEntered | datetime | | | 0000-00-00 00:00:00 | | | iUpdatedby | int(11) | | | 0 | | | tUpdated | datetime | | | 0000-00-00 00:00:00 | | +-----------------+----------+------+-----+---------------------+----------------+ 10 rows in set (0.00 sec)
Look at the query below:
mysql> SELECT cName,iImo FROM gen_Lloyds_vessel WHERE gen_Lloyds_vessel.iImo = 'FOOBAR'; +----------------------+------+
| cName | iImo |
+----------------------+------+
| SSG EDWARD A. CARTER | 0 |
| LYKES HERO | 0 |
| PONL GENOA | 0 |
| YM MILANO | 0 |
| PONL NEWARK | 0 |
| COSCO NORFOLK | 0 |
| PONL JAKARTA | 0 |
| PONL SYDNEY | 0 |
| PONL GENOA | 0 |
| PONL MARSEILLE | 0 |
+----------------------+------+
10 rows in set (0.07 sec)
None of these iImo fields has the value 'FOOBAR' but still I receive these results. Anyone have a clue what is causing this?
iImo is a numeric field, mysql knows it, and automagically converts the string 'FOOBAR' to a numeric value: 0. You are actually querying for iImo=0. Try this:
SELECT 'FOOBAR'+0,'FOOBAR'=0;
-- Roger
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