t sql null or empty string
select * from vendor
where isnull(vendor_email,'') = ''t sql null or empty string
select * from vendor
where isnull(vendor_email,'') = ''sql check for null and empty string
IF ISNULL(@param) OR @param = '' THEN doSomething...sql is not null
The reverse of NULL. Tests for values that aren’t empty / NULL
"Tests for empty (NULL) values.
Example: Returns users that haven’t given a contact number.
SELECT * FROM users
WHERE contact_number IS NULL;"Copyright © 2021 Codeinu
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