create table oracle
CREATE TABLE ot.persons(
person_id NUMBER GENERATED BY DEFAULT AS IDENTITY,
first_name VARCHAR2(50) NOT NULL,
last_name VARCHAR2(50) NOT NULL,
PRIMARY KEY(person_id)
);create table oracle
CREATE TABLE ot.persons(
person_id NUMBER GENERATED BY DEFAULT AS IDENTITY,
first_name VARCHAR2(50) NOT NULL,
last_name VARCHAR2(50) NOT NULL,
PRIMARY KEY(person_id)
);alter table oracle
ALTER TABLE tablename MODIFY columnname varchar2(100)PL SQL MODIFY COLUMN NME
ALTER TABLE table_name
RENAME COLUMN old_name TO new_name;update table syntax in oracle
{
UPDATE table-Name [[AS] correlation-Name]
SET column-Name = Value
[ , column-Name = Value} ]*
[WHERE clause] |
UPDATE table-Name
SET column-Name = Value
[ , column-Name = Value ]*
WHERE CURRENT OF
}alter table oracle
ALTER TABLE table_name
ADD CONSTRAINT constraint_name
FOREIGN KEY (column1, column2, ... column_n)
REFERENCES parent_table (column1, column2, ... column_n);Copyright © 2021 Codeinu
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