O Guia Definitivo do Yii 1.1

The truncateTable method builds and executes a SQL statement for truncating a table.
The $table parameter specifies the name of the table to be truncated. The query builder
will quote the table name properly.
Below is an example showing how to truncate a table:
// TRUNCATE TABLE `tbl_user`
truncateTable('tbl_user')
addColumn
function addColumn($table, $column, $type)
The addColumn method builds and executes a SQL statement for adding a new table
column. The $table parameter specifies the name of the table that the new column will be
added to. The $column parameter specifies the name of the new column. And $type
specifies the definition of the new column. Column definition can contain abstract data
type, as described in the subsection of "createTable". The query builder will quote the table
name as well as the column name properly.
Below is an example showing how to add a table column:
// ALTER TABLE `tbl_user` ADD `email` varchar(255) NOT NULL
addColumn('tbl_user', 'email', 'string NOT NULL')
dropColumn
function dropColumn($table, $column)
The dropColumn method builds and executes a SQL statement for dropping a table
column. The $table parameter specifies the name of the table whose column is to be
dropped. The $column parameter specifies the name of the column to be dropped. The
query builder will quote the table name as well as the column name properly.
Below is an example showing how to drop a table column:
// ALTER TABLE `tbl_user` DROP COLUMN `location`
dropColumn('tbl_user', 'location')
renameColumn
function renameColumn($table, $name, $newName)
The renameColumn method builds and executes a SQL statement for renaming a table
column. The $table parameter specifies the name of the table whose column is to be
renamed. The $name parameter specifies the old column name. And $newName specifies