add column table sql default value
ALTER TABLE users
ADD visit_number INT DEFAULT 0;add column table sql default value
ALTER TABLE users
ADD visit_number INT DEFAULT 0;how to add default constraint in mysql
ALTER TABLE "name_table" ALTER "name_column"
SET DEFAULT value_default;sql default
Sets a default value for a column;
Example 1 (MySQL): Creates a new table called Products which has a
name column with a default value of ‘Placeholder Name’ and an available_
from column with a default value of today’s date.
CREATE TABLE products (
id int,
name varchar(255) DEFAULT 'Placeholder Name',
available_from date DEFAULT GETDATE()
);
Example 2 (MySQL): The same as above, but editing an existing table.
ALTER TABLE products
ALTER name SET DEFAULT 'Placeholder Name',
ALTER available_from SET DEFAULT GETDATE();how to check default value of column in sql server
SELECT object_definition(default_object_id) AS definition
FROM sys.columns
WHERE name ='colname'
AND object_id = object_id('dbo.tablename')Copyright © 2021 Codeinu
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