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

6 votes172 views2 answers
Find mysql version linux
SQL
0 vote190 views1 answer
Install package for sqlserver in asp.net core
SQL
0 vote166 views1 answer
Sqlite3 now
SQL
0 vote167 views1 answer
Strat with in sql
SQL
1 vote176 views4 answers
Psql check tables command
SQL
0 vote183 views1 answer
Change date format in oracle query
SQL
0 vote175 views2 answers
Mysql on update current_timestamp
SQL
0 vote193 views1 answer
Mysql range of dates overlap
SQL
0 vote171 views1 answer
First mysql
SQL
7 votes187 views1 answer
Grant schema permissions postgres
SQL