Hi, it seems that when there is an 'union' in a query it transforms the 'null' to '0' when the field is a number, and more over, I think the result is wrong... I am using the 4.0.12 mysql server for Win32 in a Windows NT server.
this is the query...
select id, name from customer union all select null as id, name from customer
And... this is the result !!! ----------------------- id name ----------------------- 1 John Smith 2 Robert O Neill 3 Paul Mackenzie 0 Paul Mackenzie 0 Paul Mackenzie 0 Paul Mackenzie
If you want to test it, here are my table and records...
CREATE TABLE IF NOT EXISTS Customer (
id INTEGER PRIMARY KEY AUTO_INCREMENT,
name VARCHAR(50));
INSERT INTO Customer (name) VALUES ('John Smith');
INSERT INTO Customer (name) VALUES ('Robert O Neill');
INSERT INTO Customer (name) VALUES ('Paul Mackenzie');
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