sql server UPDATE column code example

Example 1: sql server alter column

ALTER TABLE table_name 
ALTER COLUMN column_name new_data_type(size);

Example 2: update column sql server

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

Example 3: 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 4: alter table query sql server change column

ALTER TABLE table_name
  DROP COLUMN column_name;

Example 5: alter table query sql server change column

sp_rename 'table_name.old_column_name', 'new_column_name', 'COLUMN';