NOT NULL SQL

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
);

Is not null sql

select c_custkey, c_name, c_address from customer where c_custkey in (select o_orderkey from orders where o_orderkey IS NOT NULL)

Similar codes

0 vote199 views1 answer
Get first name and last name from full name string in SQL
SQL
11 votes169 views1 answer
Reset identity sql server
SQL
0 vote202 views2 answers
2nd max salary query in sql
SQL
5 votes201 views3 answers
Truncate function in sql oracle
SQL
0 vote214 views1 answer
Select row from mysql where date more than 30 days
SQL
7 votes220 views5 answers
Max 3 salary in sql
SQL
3 votes204 views1 answer
Create a table with an id in mysql
SQL
0 vote253 views1 answer
Get from database the most recent data limit by 5
SQL
0 vote199 views1 answer
Bigquery declare
SQL
0 vote206 views2 answers
Sql query inner join 3 tables
SQL