oracle alter table code example

Example 1: alter table oracle

ALTER TABLE tablename MODIFY columnname varchar2(100)

Example 2: add column table pl sql

ALTER TABLE table_name
  ADD column_name column_definition;

Example 3: 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
}

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