alter table modify column sql code example

Example 1: sql server alter column

ALTER TABLE table_name 
ALTER COLUMN column_name new_data_type(size);

Example 2: alter table modify column

-- ORACLE 18c
ALTER TABLE table_name 
MODIFY column_name datatype;

-- Example
ALTER TABLE product
MODIFY description VARCHAR2(500 char);

Example 3: alter table query sql server change column

ALTER TABLE table_name
  ALTER COLUMN column_name column_type;

Example 4: alter table query sql server change column

ALTER TABLE table_name
  DROP COLUMN column_name;