javascript not null
if (variable !== null) {
console.log("Var is NOT null");
}javascript not null
if (variable !== null) {
console.log("Var is NOT null");
}sql not null
SELECT column_name FROM table_name
WHERE column_name IS NOT NULL;Select without null values sql
SELECT column_names
FROM table_name
WHERE column_name IS NOT NULL;NOT NULL SQL
By default, a column can hold NULL values.
The NOT NULL constraint enforces a column to NOT accept NULL values.
This enforces a field to always contain a value, which means that you cannot insert a new record, or update a record without adding a value to this field.
Sql NOT NULL in creating a table
CREATE TABLE Persons (
ID int NOT NULL,
LastName varchar(255) NOT NULL,
FirstName varchar(255) NOT NULL,
Age int
);not null
SELECT NVL(emp_id,001)emp_id,emp_name FROM employee_details;Copyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
