modify table code example
Example 1: sql add column
ALTER TABLE Customers
ADD Email varchar(255);
Example 2: sqlserver add column to table
ALTER TABLE dbo.doc_exa
ADD column_b VARCHAR(20) NULL,
column_c INT NULL ;
Example 3: alter table modify column
-- ORACLE 18c
ALTER TABLE table_name
MODIFY column_name datatype;
-- Example
ALTER TABLE product
MODIFY description VARCHAR2(500 char);