oracel的pl/sql有:You use the BOOLEAN datatype to store the logical values TRUE, FALSE, and NULL
(which stands for a missing, unknown, or inapplicable value). Only logic operations are allowed on BOOLEAN variables.The BOOLEAN datatype takes no parameters. Only the values TRUE, FALSE, and
NULL can be assigned to a BOOLEAN variable. You cannot insert the values TRUE
and FALSE into a database column. Also, you cannot select or fetch column values
into a BOOLEAN variable.oracel的sql没有。
(which stands for a missing, unknown, or inapplicable value). Only logic operations are allowed on BOOLEAN variables.The BOOLEAN datatype takes no parameters. Only the values TRUE, FALSE, and
NULL can be assigned to a BOOLEAN variable. You cannot insert the values TRUE
and FALSE into a database column. Also, you cannot select or fetch column values
into a BOOLEAN variable.oracel的sql没有。
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D6I 的checkbox和radiobutton都没有BOOLEAN
type BOOLEAN is (FALSE, TRUE);
有布尔类型:boolean但只能赋值true 或false