让我们首先创建一个表。我们已将其中一列设置为TINYINT类型-
create table DemoTable -> ( -> EmployeeId int, -> isMarried tinyint -> );
使用插入命令在表中插入一些记录-
insert into DemoTable values(101,true); insert into DemoTable values(102,false); insert into DemoTable values(103,true); insert into DemoTable values(104,true);
使用select语句显示表中的所有记录-
select *from DemoTable;
这将产生以下输出-
+------------+----------+ | EmployeeId | isMarried| +------------+----------+ | 101 | 1 | | 102 | 0 | | 103 | 1 | | 104 | 1 | +------------+----------+ 4 rows in set (0.00 sec)
这是使用TINYINT实现UPDATE语句的查询-
update DemoTable -> set isMarried=false -> where EmployeeId=103; Rows matched: 1 Changed: 1 Warnings: 0
让我们再次检查表记录-
select *from DemoTable;
这将产生以下输出-
+------------+----------+ | EmployeeId | isMaried | +------------+----------+ | 101 | 1 | | 102 | 0 | | 103 | 0 | | 104 | 1 | +------------+----------+ 4 rows in set (0.00 sec)