The BIT data type can also be used to represent the boolean values in MySQL. When using a BIT data type for storing boolean values, you can proceed without defining the data type’s range because MySQL will automatically create a column of type BIT(1), which will allow you to store the...
方法一:使用整数值 在MySQL中,可以使用整数值1和0来表示Boolean类型的值。可以通过直接插入整数值来设置Boolean类型的字段。 示例代码如下: -- 创建users表CREATETABLEusers(idINTPRIMARYKEY,nameVARCHAR(50),activeTINYINT(1));-- 插入数据INSERTINTOusers(id,name,active)VALUES(1,'Alice',1),(2,'Bob',0),...
可以如下插入boolean值:insert into [xxxx(xx)] values(true),当然也可以values(1); 举例如下: mysql> alter table test add isOk boolean; Query OK mysql> desc test; +---+---+---+---+---+---+ | Field | Type | Null | Key | Default | Extra | +---+---+---+---+---+---...
MySQL don't have bool type..(check manual for more)..in your case try ENUM for those columns.. Regards, Umesh Shastry http://www.blogger.com/profile/02551756983528645221 Sorry, you can't reply to this topic. It has been closed.
关于MySQL 的 boolean 和 tinyint(1) 一、oracle本身没有boolean类型,就是说跟数据库相关的类型中不包括boolean,一般采用number(1)和char(1)来实现。 所以”You cannot insert the values TRUE and FALSE into a database column. Also, you cannot select or fetch column values into a BOOLEAN variable.“...
I.MySQL数据库将字段的数据类型BOOL/BOOLEAN默认地转换成TINYINT(1); II.MySQL数据库自动完成的数据类型转换过程,没有给出任何错误或警告信息提示; b). 测试数据的写入 root@localhost : test 05:12:58> INSERT INTO boolean_test(Online_Flag,Lock_Flag) VALUES(TRUE,FALSE); ...
TheResultSet.getObject()method uses the type conversions between MySQL and Java types, following the JDBC specification where appropriate. The values returned byResultSetMetaData.GetColumnTypeName()andResultSetMetaData.GetColumnClassName()are shown in the table below. For more information on the JDBC ...
I use TINYINT(1) in order to store boolean values in Mysql. I don't know if there is any advantage to use this... But if i'm not wrong, mysql can store boolean (BOOL) and it store it as a tinyint(1) http://dev.mysql.com/doc/refman/5.0/en/other-vendor-data-types.html Sha...
I.MySQL数据库将字段的数据类型BOOL/BOOLEAN默认地转换成TINYINT(1); II.MySQL数据库自动完成的数据类型转换过程,没有给出任何错误或警告信息提示; b). 测试数据的写入 root@localhost:test05:12:58>INSERT INTO boolean_test(Online_Flag,Lock_Flag)VALUES(TRUE,FALSE); ...
Posted by:fnando p Date: June 07, 2005 04:41AM Some colluns of my database are boolean values, but I am representing it with INTEGERS. Can I use directly the type bool? Sorry, you can't reply to this topic. It has been closed....