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

3 votes116 views4 answers
Mysql decimal
SQL
-1 vote116 views2 answers
REMOVE DATE FROM DATE TIME SQL SERVER
SQL
1 vote124 views1 answer
Postgresql if 0 then 1
SQL
1 vote117 views2 answers
T-sql random number for each row
SQL
4 votes113 views1 answer
Oracle show error line number
SQL
0 vote124 views2 answers
Sql trigger difference between for and after
SQL
0 vote100 views1 answer
Java spring boot connect to sql server
SQL
0 vote241 views1 answer
The differnece between to values in sql
SQL
0 vote129 views1 answer
SQL check if record exist
SQL
0 vote120 views1 answer
ValueError: A string literal cannot contain NUL (0x00) characters.
SQL