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

4 votes192 views3 answers
Sql drop primary key
SQL
0 vote166 views1 answer
Insert thai language sql server
SQL
3 votes220 views3 answers
Create table in SQL Server
SQL
1 vote176 views1 answer
Sql only five first row
SQL
0 vote298 views1 answer
How to delete duplicate rows in oracle
SQL
0 vote187 views1 answer
Psql get table data types
SQL
0 vote198 views1 answer
Sql query to find duplicate email address
SQL
0 vote184 views1 answer
Mysql table variables
SQL
1 vote196 views2 answers
Copy database mysql
SQL
0 vote146 views1 answer
Mysql collation for all languages
SQL