sql alter table modify code example

Example 1: sql add column

ALTER TABLE Customers
ADD Email varchar(255);

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: rename column sql

ALTER TABLE nom_table
RENAME COLUMN colonne_ancien_nom TO colonne_nouveau_nom

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