sql change code example

Example 1: sql server alter column

ALTER TABLE table_name 
ALTER COLUMN column_name new_data_type(size);

Example 2: sqlserver add column to table

ALTER TABLE dbo.doc_exa 
ADD column_b VARCHAR(20) NULL, 
	column_c INT NULL ;

Example 3: update column sql server

UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;

Example 4: how to change the value of a table in sql

UPDATE employees 
SET 
    address = '1300 Carter St',
    city = 'San Jose',
    postalcode = 95125,
    region = 'CA'
WHERE
    employeeID = 3;

Example 5: sql update record

UPDATE table_name
SET column1 = value1, column2 = value2...., columnN = valueN
WHERE [condition];