BOOLEAN或TINYINT将值存储在MySQL中?
MySQL BOOLEAN和BOOL都等效于TINYINT(1)。每当使用BOOLEAN和BOOL数据类型创建列时,MySQL都会将BOOLEAN和BOOL隐式转换为TINYINT(1)。BOOLEAN和BOOL是TINYINT(1)的等效项,因为它们是同义词。
使用BOOLEAN数据类型创建一个表。查询创建表。
mysql> create table BooleanDemo-> (
-> IsOn BOOLEAN
-> );
现在检查上表的内部结构。查询如下-
mysql> show create table BooleanDemo;
输出结果
+-------------+----------------------------------------------------------------------------------------------------------------------------------+| Table | Create Table |
+-------------+----------------------------------------------------------------------------------------------------------------------------------+
| BooleanDemo | CREATE TABLE `booleandemo` ( `IsOn` tinyint(1) DEFAULT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci |
+-------------+----------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.01 sec)
看上面的示例输出,BOOLEAN被转换为tinyint(1)。BOOL数据类型也是如此。创建表的查询如下-
mysql> create table BOOLDemo-> (
-> validUser BOOL
-> );
现在检查表的内部结构。查询如下-
mysql> show create table BOOLDemo;
输出结果
+----------+------------------------------------------------------------------------------------------------------------------------------------+| Table | Create Table |
+----------+------------------------------------------------------------------------------------------------------------------------------------+
| BOOLDemo | CREATE TABLE `booldemo` (`validUser` tinyint(1) DEFAULT NULL ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci |
+----------+------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
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