While reading celko's SQL puzzles (second edition) i followed a reference to
http://www.dbmsmag.com/9801d06.html.
There is a puzzle that counts items in boxes.
When i try to run the proposed solution on PG 8.1.5, PG says: ERROR: column reference
qty is ambiguous
apparently the variable
L van der Walt wrote:
I have three table:
Users - Contains username, ID etc...
Permissions - A permission name and ID
Link up table - The user.id and permission.id
If a user.id and a permission.id row exists in the linkuptable the user
have that permission granted.
With the statement
how can i specify an integer to be one byte byte or even 4 bits long?
int1, int(1), tinyint are nowhere to be seen.
smallest i can find is smallint that is 2 bytes.
in a table i will have a few columns with values between 0 and 15, so
optimally i am looking for some kind of unsigned 4-bits, or
