单项选择题 What type of constraint can be used to ensure that, in any given row in a table, the value of one column never exceeds the value of another column?（）

单项选择题 Which of the following will be a consequence of defining the column IDCOL2 in TABLE2 as a foreign key referencing the primary key (IDCOL1) of TABLE1?（）

单项选择题 A stored procedure object is created into which DB2 object?（）