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Posted by --CELKO-- on 10/30/06 21:26
Did you notice that you have put the prefix "fld-" on all the columns?
This is not just a great way to destroy a data dictioanry and violate
ISO-11179 rules, but it also tells us that you have not idea waht
columns are nothing like fields. Likewise, the silly, redundant "tbl-"
prefix.
You have no key on the table. Identity cannot ever be a relational
key. I can insert the same user data 1000 times and you will not
detect the redundancy. You have no defaults or constraints. What the
he3ck is a batch? It looks like a flag of some kind, but we do not use
those in SQL.
What you did was mimic a deck of punch cards or a magnetic tape file.
Clean up the data element and get yourself a key and constraints, more
like this:
CREATE TABLE AdminUsers
(user_name VARCHAR(20) NOT NULL PRIMARY KEY,
password VARCHAR(20) NOT NULL
CHECK (LEN(password) > 5), -- other rules?
full_name VARCHAR(50) NOT NULL, -- trim spaces?
permission_code INTEGER DEFAULT 0 NOT NULL,
email_addr VARCHAR(50) NOT NULL
CHECK (<<grep pattern match>>),
user_initials VARCHAR(3) DEFAULT ' ' NOT NULL,
lastlogon_date DATETIME
DEFAULT CURRENT_TIMESTAMP NOT NULL,
batch_foobarflag CHAR(1) NOT NULL); what is it?
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