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 vote37 views1 answer
Fast sql column count
SQL
-1 vote40 views1 answer
Ssql to lowercqse
SQL
1 vote49 views1 answer
Postgresql float 2 decimal places
SQL
1 vote46 views1 answer
Sql server list locks
SQL
8 votes30 views1 answer
Sql remove characters from string right
SQL
0 vote36 views1 answer
Case when with count and combining similar values in sql
SQL
3 votes54 views2 answers
Oracle sql first day of month
SQL
15 votes33 views3 answers
Create table with primary key auto increment in sql
SQL
0 vote45 views1 answer
Sql delete where x or y or z
SQL
10 votes35 views6 answers
Mysql delete duplicates
SQL