change values in sql code example

Example 1: 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 2: sql update from select

UPDATE YourTable 
SET Col1 = OtherTable.Col1, 
    Col2 = OtherTable.Col2 
FROM (
    SELECT ID, Col1, Col2 
    FROM other_table) AS OtherTable
WHERE 
    OtherTable.ID = YourTable.ID

Example 3: sql update record

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

Example 4: updating values in sql

//to update value

UPDATE students SET course_id = 102
WHERE last_name = 'Jones'; -> 
                 if there is no condition it will update all!