Specifies MySQL specific data type of a field, property, for use in a MySqlParameter.Namespace: MySql.Data.MySqlClientAssembly: MySql.Data.dllVersion: 9.3.0Syntaxpublic enum MySqlDbType Fields NameDescription Binary Fixed length binary string. Bit Bit-field data type Blob A binary column with ...
I am using MySQL server 5.0 and Query Browser 1.2.13. When I change a column in empty table from CHAR type to ENUM data type, QB reports error, it doesn't like: DEFAULT NULL =====================================
An ENUM is a string object with a value chosen from a list of permitted values that are enumerated explicitly in the column specification at table creation time. See Section 11.3.1, “String Data Type Syntax” for ENUM type syntax and length limits. ...
mysql> select * from setenum where settype=b'10011'; Empty set mysql> select * from setenum where enumtype=b'100'; Empty set 1. 2. 3. 4. 5. 6. 7. 8. SELECT * FROM setenum WHERE settype LIKE '%赵%'; 1. –与FIND_IN_SET函数同 SELECT * FROM setenum WHERE FIND_IN_SET('...
1 row in set (0.00 sec) 3、读写时不要使用数字 由于上面介绍的用索引值存储的特性,我们不要用枚举类型来存储数字格式的列,否则会引起很大的混淆,如: mysql> create table test2 (numbers enum('0', '1', '2')); Query OK, 0 rows affected (0.04 sec) ...
1 row in set (5.11 sec) root@localhost : mysqlops 02:45:40> ALTER TABLE mysqlops_set_enum MODIFY Work_Option enum(‘JavaScript’,‘DBA’,‘SA’,‘C++’,‘NA’,‘QA’,‘Java’,‘other’,’’,‘Python’) NOT NULL DEFAULT ‘DBA’; ...
1 row in set (0.00 sec) 测试第二个枚举类型字段Work_City是否允许存储NULL值: root@localhost : test 11:22:53> INSERT INTO mysqlops_enum(ID,Job_type,Work_City) VALUES(3,‘Other’,NULL); ERROR 1048 (23000): Column ‘Work_City’ cannot be null ...
MySQL数据库:5.5.15-log InnoDB存储引擎:plugin-InnoDB 1.1.8 (二) 测试数据准备 鉴于篇幅的缘由,单独作为一篇文章分享在www.mysqlops.com网站上,请点击MySQL数据库之数据类型集合类型和枚举类型测试环境 (三) 枚举类型ENUM字段DDL操作 a. 增加枚举类型字段定义的默认值属性 ...
The MySQL ENUM function only permits certain values in a MySQL column. Learn how to use it and why it’s important.
| database() |+---+| pymysql |+---+1 row in set (0.00 sec) mysql>mysql> select user(); -- 查询当前会话的登陆用户+---+| user() |+---+| root@localhost |+---+1 row in set (0.00 sec) mysql>mysql> show processlist; ...