mysql> create table test (name varchar(40), sex enum('male', concat('fem', 'ale') ); ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'concat('fem', 'ale') )' at line 1...
| id | settype | enumtype | +---+---+---+ | 1 | we,周,钱 | 南海 | | 3 | we,赵 | 南海 | +---+---+---+ 2 rows in set mysql> SELECT * FROM setenum WHERE settype LIKE '赵'; Empty set mysql> SELECT * FROM setenum WHERE settype = '赵'; Empty set mysql> SEL...
root@localhost : mysqlops 02:05:24> SELECT COUNT() FROM mysqlops_set_enum WHERE Work_Option=’’; ±---+ | COUNT() | ±---+ | 4017251 | ±---+ 1 row in set (5.00 sec) root@localhost : mysqlops 02:05:40> SELECT * FROM mysqlops_set_enum limit 6000000,1; ±---±---±...
Specifies MySQL specific data type of a field, property, for use in aMySqlParameter. Namespace:MySql.Data.MySqlClient Assembly: MySql.Data.dll Version: 9.1.0 Syntax publicenumMySqlDbType Fields NameDescription Binary Fixed length binary string. ...
使用 MySQL ENUM 作为列的数据类型有两个主要的好处，一是使得数据更紧凑进而节省空间，二是更好的可...
1 row in set (0.00 sec) 测试第二个枚举类型字段未插入数据的情况下,是否能使用上字段定义中指定的默认值: root@localhost : test 11:23:17> INSERT INTO Mysqlops_enum(ID,Job_type) VALUES(6,‘DBA’); Query OK, 1 row affected (0.00 sec) ...
MySQL中的ENUM是一种数据类型,用于定义一个列可以拥有的预定义值集合。它类似于一个固定长度的字符串对象,但实际上是一个有序的整数类型,每个枚举值都会被分配一个从1开始的索引值。 **基础概念:...
...typeHandlers> <typeHandler handler="org.apache.ibatis.type.EnumTypeHandler" javaType="java.lang.Enum 64310 MySQL中ENUM类型学习--MySql语法 在某些情况下,ENUM值也可以为空字符串('')或NULL: · 如果你将一个非法值插入ENUM(也就是说,允许的值列之外的字符串),将插入空字符串以作为特殊错误值。......
mysql>INSERTINTOt(numbers)VALUES(2),('2'),('3');mysql>SELECT*FROMt;+---+|numbers|+---+|1||2||2|+---+ To determine all possible values for anENUMcolumn, useSHOW COLUMNS FROMtbl_nameLIKE 'enum_col'and parse theENUMdefinition in theTypecolumn of the output. In the C API,ENUM...
Category:MySQL ServerSeverity:S3 (Non-critical) Version:5.5.9OS:Any Assigned to:CPU Architecture:Any [31 May 2011 10:59] Dennis Cheung Description:In a table with primary key type ENUM, is expected only valid key will exists in table. However, you can insert null enum into the table.How...