average() public method Returns the average of the specified

setIsolationLevel() public method Sets the transaction

$select public property The columns being selected. For example

$indexBy public property The name of the column by which the query

alterColumn() public method Builds a SQL statement for

query() public method Executes the SQL statement and returns

init() public method Initializes the object.

setAttribute() public method Sets the named attribute

$emulatePrepare public property Whether to turn on prepare emulation

$comment public property Comment of this column. Not all DBMS