Answers for "oracle add column to table"

alter table oracle

ALTER TABLE tablename MODIFY columnname varchar2(100)

oracle add column

-- ALTER TABLE <table> ADD <column> <type>  <constraint>;
ALTER TABLE members ADD age NUMBER;
ALTER TABLE members ADD birth_date DATE NOT NULL;
ALTER TABLE members ADD registering DATE DEFAULT sysdate;
ALTER TABLE members ADD member_id NUMBER UNIQUE;

add column table pl sql

ALTER TABLE table_name
  ADD column_name column_definition;

oracle alter table add column

ALTER TABLE table_name 
	ADD column_name data_type constraint;