Delete blank column

hi! can anybody please help me..i have a table employee and it has 4 column namely id,lastname,firstname,salary and i want to delete all rows where firstname is equal to blank or ' ' NULL? thanks a bunch!DELETE FROM employee
WHERE firstname IS NULL
OR firstname = ' ';|||thanks so much!!|||i call homework

define unique keys

I have a primary key (column name is emp_id) in employee table. Also,
I would like to make a combination of other two columns is unique.
(combination of officecode field and claimno field must be unique).
how can I implement this uniquess in ms sql 2000? thank you.On 17 Oct 2007 13:41:28 -0700, TGEAR wrote:

Quote:

Originally Posted by

>I have a primary key (column name is emp_id) in employee table. Also,
>I would like to make a combination of other two columns is unique.
>(combination of officecode field and claimno field must be unique).
>how can I implement this uniquess in ms sql 2000? thank you.

Hi TGEAR,

CREATE TABLE Demo
(PrimaryKeyColumn int NOT NULL
,HalfOfOtherKeyColumn int NOT NULL
,OtherHalfOfOtherKey int NOT NULL
,SomeOhterKeyForFun int NOT NULL
,CONSTRAINT pk_Demo PRIMARY KEY (PrimaryKeyColumn)
,CONSTRAINT uq_Demo UNIQUE (HalfOfOtherKeyColumn, OtherHalfOfOtherKey)
);

--
Hugo Kornelis, SQL Server MVP
My SQL Server blog: http://sqlblog.com/blogs/hugo_kornelis|||TGEAR wrote:

Quote:

Originally Posted by

I have a primary key (column name is emp_id) in employee table. Also,
I would like to make a combination of other two columns is unique.
(combination of officecode field and claimno field must be unique).
how can I implement this uniquess in ms sql 2000? thank you.

alter table employee
add constraint officecode_claimno
unique (officecode, claimno)